/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/nzb-file-trans.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 04:44:44,152 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 04:44:44,154 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 04:44:44,197 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 04:44:44,218 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-05 04:44:44,220 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-05 04:44:44,222 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-05 04:44:44,223 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-05 04:44:44,226 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-05 04:44:44,227 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-05 04:44:44,229 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-05 04:44:44,233 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-05 04:44:44,234 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-05 04:44:44,236 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-05 04:44:44,237 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-05 04:44:44,239 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-05 04:44:44,247 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-05 04:44:44,253 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 04:44:44,254 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 04:44:44,254 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 04:44:44,262 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-05 04:44:44,298 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 04:44:44,298 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 04:44:44,298 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 04:44:44,298 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 04:44:44,301 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 04:44:44,301 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 04:44:44,301 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 04:44:44,301 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 04:44:44,301 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 04:44:44,301 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 04:44:44,302 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 04:44:44,302 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 04:44:44,302 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 04:44:44,303 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 04:44:44,303 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 04:44:44,303 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 04:44:44,303 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 04:44:44,303 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 04:44:44,303 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 04:44:44,303 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 04:44:44,304 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 04:44:44,304 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 04:44:44,304 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 04:44:44,304 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 04:44:44,304 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 04:44:44,304 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 04:44:44,304 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 04:44:44,305 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 04:44:44,305 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 04:44:44,305 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 04:44:44,305 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 04:44:44,305 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 04:44:44,593 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 04:44:44,612 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 04:44:44,615 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 04:44:44,616 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 04:44:44,617 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 04:44:44,617 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/nzb-file-trans.wvr.bpl [2021-06-05 04:44:44,618 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/nzb-file-trans.wvr.bpl' [2021-06-05 04:44:44,658 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 04:44:44,660 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 04:44:44,660 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 04:44:44,661 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 04:44:44,661 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 04:44:44,670 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:44:44" (1/1) ... [2021-06-05 04:44:44,677 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:44:44" (1/1) ... [2021-06-05 04:44:44,687 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 04:44:44,688 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 04:44:44,688 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 04:44:44,688 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 04:44:44,694 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:44:44" (1/1) ... [2021-06-05 04:44:44,694 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:44:44" (1/1) ... [2021-06-05 04:44:44,695 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:44:44" (1/1) ... [2021-06-05 04:44:44,696 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:44:44" (1/1) ... [2021-06-05 04:44:44,699 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:44:44" (1/1) ... [2021-06-05 04:44:44,702 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:44:44" (1/1) ... [2021-06-05 04:44:44,703 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:44:44" (1/1) ... [2021-06-05 04:44:44,709 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 04:44:44,710 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 04:44:44,710 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 04:44:44,710 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 04:44:44,711 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:44:44" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 04:44:44,771 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 04:44:44,771 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 04:44:44,771 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 04:44:44,771 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 04:44:44,771 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 04:44:44,771 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 04:44:44,772 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 04:44:44,772 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 04:44:44,772 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 04:44:44,772 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 04:44:44,772 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 04:44:44,773 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 04:44:44,773 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 04:44:45,328 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 04:44:45,329 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-06-05 04:44:45,330 INFO L202 PluginConnector]: Adding new model nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 04:44:45 BoogieIcfgContainer [2021-06-05 04:44:45,330 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 04:44:45,331 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 04:44:45,331 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 04:44:45,333 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 04:44:45,334 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:44:44" (1/2) ... [2021-06-05 04:44:45,334 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31586d2c and model type nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 04:44:45, skipping insertion in model container [2021-06-05 04:44:45,334 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 04:44:45" (2/2) ... [2021-06-05 04:44:45,336 INFO L111 eAbstractionObserver]: Analyzing ICFG nzb-file-trans.wvr.bpl [2021-06-05 04:44:45,340 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 04:44:45,340 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 04:44:45,341 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 04:44:45,341 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 04:44:45,375 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-05 04:44:45,393 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-05 04:44:45,409 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 04:44:45,409 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 04:44:45,409 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 04:44:45,409 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 04:44:45,410 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 04:44:45,410 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 04:44:45,410 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 04:44:45,410 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 04:44:45,416 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 28 transitions, 80 flow [2021-06-05 04:44:45,430 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 110 states, 108 states have (on average 3.4814814814814814) internal successors, (376), 109 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:45,433 INFO L276 IsEmpty]: Start isEmpty. Operand has 110 states, 108 states have (on average 3.4814814814814814) internal successors, (376), 109 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:45,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:44:45,439 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:45,440 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:45,440 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:45,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:45,445 INFO L82 PathProgramCache]: Analyzing trace with hash 454115418, now seen corresponding path program 1 times [2021-06-05 04:44:45,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:45,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79988333] [2021-06-05 04:44:45,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:45,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:45,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:45,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:45,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79988333] [2021-06-05 04:44:45,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79988333] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:44:45,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:44:45,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 04:44:45,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588299299] [2021-06-05 04:44:45,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 04:44:45,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:45,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 04:44:45,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 04:44:45,694 INFO L87 Difference]: Start difference. First operand has 110 states, 108 states have (on average 3.4814814814814814) internal successors, (376), 109 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:45,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:45,883 INFO L93 Difference]: Finished difference Result 265 states and 821 transitions. [2021-06-05 04:44:45,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 04:44:45,885 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 04:44:45,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:45,900 INFO L225 Difference]: With dead ends: 265 [2021-06-05 04:44:45,900 INFO L226 Difference]: Without dead ends: 250 [2021-06-05 04:44:45,901 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 109.2ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:44:45,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-06-05 04:44:45,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 126. [2021-06-05 04:44:45,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 3.368) internal successors, (421), 125 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:45,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 421 transitions. [2021-06-05 04:44:45,943 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 421 transitions. Word has length 14 [2021-06-05 04:44:45,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:45,943 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 421 transitions. [2021-06-05 04:44:45,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:45,944 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 421 transitions. [2021-06-05 04:44:45,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:44:45,945 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:45,945 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:45,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 04:44:45,946 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:45,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:45,947 INFO L82 PathProgramCache]: Analyzing trace with hash -947352844, now seen corresponding path program 2 times [2021-06-05 04:44:45,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:45,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374057415] [2021-06-05 04:44:45,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:45,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:46,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:46,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:46,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374057415] [2021-06-05 04:44:46,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374057415] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:44:46,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:44:46,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 04:44:46,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360843382] [2021-06-05 04:44:46,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 04:44:46,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:46,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 04:44:46,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 04:44:46,052 INFO L87 Difference]: Start difference. First operand 126 states and 421 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:46,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:46,232 INFO L93 Difference]: Finished difference Result 326 states and 1050 transitions. [2021-06-05 04:44:46,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 04:44:46,233 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 04:44:46,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:46,235 INFO L225 Difference]: With dead ends: 326 [2021-06-05 04:44:46,236 INFO L226 Difference]: Without dead ends: 311 [2021-06-05 04:44:46,236 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 80.7ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:44:46,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-06-05 04:44:46,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 132. [2021-06-05 04:44:46,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 3.312977099236641) internal successors, (434), 131 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:46,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 434 transitions. [2021-06-05 04:44:46,249 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 434 transitions. Word has length 14 [2021-06-05 04:44:46,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:46,249 INFO L482 AbstractCegarLoop]: Abstraction has 132 states and 434 transitions. [2021-06-05 04:44:46,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:46,249 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 434 transitions. [2021-06-05 04:44:46,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:44:46,250 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:46,250 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:46,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 04:44:46,251 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:46,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:46,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1857974612, now seen corresponding path program 3 times [2021-06-05 04:44:46,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:46,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903203338] [2021-06-05 04:44:46,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:46,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:46,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:46,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:46,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903203338] [2021-06-05 04:44:46,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903203338] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:44:46,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:44:46,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 04:44:46,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394671896] [2021-06-05 04:44:46,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 04:44:46,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:46,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 04:44:46,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 04:44:46,390 INFO L87 Difference]: Start difference. First operand 132 states and 434 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:46,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:46,533 INFO L93 Difference]: Finished difference Result 261 states and 774 transitions. [2021-06-05 04:44:46,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 04:44:46,534 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 04:44:46,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:46,536 INFO L225 Difference]: With dead ends: 261 [2021-06-05 04:44:46,536 INFO L226 Difference]: Without dead ends: 246 [2021-06-05 04:44:46,536 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 123.2ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:44:46,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-06-05 04:44:46,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 140. [2021-06-05 04:44:46,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 3.2949640287769784) internal successors, (458), 139 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:46,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 458 transitions. [2021-06-05 04:44:46,556 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 458 transitions. Word has length 14 [2021-06-05 04:44:46,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:46,556 INFO L482 AbstractCegarLoop]: Abstraction has 140 states and 458 transitions. [2021-06-05 04:44:46,557 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:46,557 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 458 transitions. [2021-06-05 04:44:46,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:44:46,558 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:46,558 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:46,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 04:44:46,558 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:46,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:46,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1906157040, now seen corresponding path program 4 times [2021-06-05 04:44:46,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:46,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494790699] [2021-06-05 04:44:46,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:46,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:46,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:46,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:46,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494790699] [2021-06-05 04:44:46,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494790699] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:44:46,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:44:46,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 04:44:46,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641501259] [2021-06-05 04:44:46,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 04:44:46,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:46,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 04:44:46,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 04:44:46,662 INFO L87 Difference]: Start difference. First operand 140 states and 458 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:46,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:46,801 INFO L93 Difference]: Finished difference Result 264 states and 776 transitions. [2021-06-05 04:44:46,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 04:44:46,802 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 04:44:46,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:46,804 INFO L225 Difference]: With dead ends: 264 [2021-06-05 04:44:46,804 INFO L226 Difference]: Without dead ends: 249 [2021-06-05 04:44:46,804 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 109.0ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:44:46,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-06-05 04:44:46,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 140. [2021-06-05 04:44:46,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 3.2949640287769784) internal successors, (458), 139 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:46,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 458 transitions. [2021-06-05 04:44:46,811 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 458 transitions. Word has length 14 [2021-06-05 04:44:46,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:46,811 INFO L482 AbstractCegarLoop]: Abstraction has 140 states and 458 transitions. [2021-06-05 04:44:46,811 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:46,811 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 458 transitions. [2021-06-05 04:44:46,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:44:46,812 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:46,813 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:46,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 04:44:46,813 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:46,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:46,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1941149522, now seen corresponding path program 5 times [2021-06-05 04:44:46,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:46,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377891909] [2021-06-05 04:44:46,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:46,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:46,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:46,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:46,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377891909] [2021-06-05 04:44:46,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377891909] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:44:46,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:44:46,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 04:44:46,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430433404] [2021-06-05 04:44:46,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 04:44:46,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:46,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 04:44:46,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 04:44:46,932 INFO L87 Difference]: Start difference. First operand 140 states and 458 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:47,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:47,188 INFO L93 Difference]: Finished difference Result 229 states and 668 transitions. [2021-06-05 04:44:47,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 04:44:47,189 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 04:44:47,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:47,191 INFO L225 Difference]: With dead ends: 229 [2021-06-05 04:44:47,191 INFO L226 Difference]: Without dead ends: 214 [2021-06-05 04:44:47,191 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 238.6ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:44:47,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-06-05 04:44:47,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 142. [2021-06-05 04:44:47,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 3.3120567375886525) internal successors, (467), 141 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:47,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 467 transitions. [2021-06-05 04:44:47,198 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 467 transitions. Word has length 14 [2021-06-05 04:44:47,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:47,198 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 467 transitions. [2021-06-05 04:44:47,198 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:47,198 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 467 transitions. [2021-06-05 04:44:47,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:44:47,199 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:47,199 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:47,199 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 04:44:47,200 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:47,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:47,200 INFO L82 PathProgramCache]: Analyzing trace with hash 1674927890, now seen corresponding path program 6 times [2021-06-05 04:44:47,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:47,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876029701] [2021-06-05 04:44:47,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:47,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:47,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:47,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:47,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876029701] [2021-06-05 04:44:47,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876029701] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:44:47,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:44:47,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 04:44:47,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595596433] [2021-06-05 04:44:47,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 04:44:47,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:47,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 04:44:47,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 04:44:47,288 INFO L87 Difference]: Start difference. First operand 142 states and 467 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:47,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:47,603 INFO L93 Difference]: Finished difference Result 336 states and 1030 transitions. [2021-06-05 04:44:47,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:44:47,604 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 04:44:47,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:47,606 INFO L225 Difference]: With dead ends: 336 [2021-06-05 04:44:47,606 INFO L226 Difference]: Without dead ends: 321 [2021-06-05 04:44:47,606 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 228.2ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:44:47,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-06-05 04:44:47,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 142. [2021-06-05 04:44:47,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 3.3120567375886525) internal successors, (467), 141 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:47,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 467 transitions. [2021-06-05 04:44:47,613 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 467 transitions. Word has length 14 [2021-06-05 04:44:47,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:47,613 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 467 transitions. [2021-06-05 04:44:47,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:47,613 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 467 transitions. [2021-06-05 04:44:47,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:44:47,614 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:47,614 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:47,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-05 04:44:47,614 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:47,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:47,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1444712772, now seen corresponding path program 1 times [2021-06-05 04:44:47,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:47,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137552971] [2021-06-05 04:44:47,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:47,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:47,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:47,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:47,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137552971] [2021-06-05 04:44:47,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137552971] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:44:47,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:44:47,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 04:44:47,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348162412] [2021-06-05 04:44:47,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 04:44:47,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:47,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 04:44:47,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 04:44:47,630 INFO L87 Difference]: Start difference. First operand 142 states and 467 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:47,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:47,635 INFO L93 Difference]: Finished difference Result 166 states and 549 transitions. [2021-06-05 04:44:47,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 04:44:47,635 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:44:47,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:47,636 INFO L225 Difference]: With dead ends: 166 [2021-06-05 04:44:47,637 INFO L226 Difference]: Without dead ends: 166 [2021-06-05 04:44:47,637 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 04:44:47,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-06-05 04:44:47,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2021-06-05 04:44:47,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 3.327272727272727) internal successors, (549), 165 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:47,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 549 transitions. [2021-06-05 04:44:47,642 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 549 transitions. Word has length 15 [2021-06-05 04:44:47,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:47,642 INFO L482 AbstractCegarLoop]: Abstraction has 166 states and 549 transitions. [2021-06-05 04:44:47,642 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:47,642 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 549 transitions. [2021-06-05 04:44:47,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:44:47,643 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:47,643 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:47,643 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 04:44:47,643 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:47,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:47,644 INFO L82 PathProgramCache]: Analyzing trace with hash 868256482, now seen corresponding path program 1 times [2021-06-05 04:44:47,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:47,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610655092] [2021-06-05 04:44:47,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:47,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:47,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:47,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:47,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610655092] [2021-06-05 04:44:47,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610655092] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:44:47,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:44:47,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 04:44:47,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660374121] [2021-06-05 04:44:47,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 04:44:47,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:47,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 04:44:47,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 04:44:47,660 INFO L87 Difference]: Start difference. First operand 166 states and 549 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:47,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:47,665 INFO L93 Difference]: Finished difference Result 192 states and 636 transitions. [2021-06-05 04:44:47,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 04:44:47,665 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:44:47,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:47,666 INFO L225 Difference]: With dead ends: 192 [2021-06-05 04:44:47,667 INFO L226 Difference]: Without dead ends: 192 [2021-06-05 04:44:47,667 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 04:44:47,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-06-05 04:44:47,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2021-06-05 04:44:47,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 3.329842931937173) internal successors, (636), 191 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:47,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 636 transitions. [2021-06-05 04:44:47,677 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 636 transitions. Word has length 15 [2021-06-05 04:44:47,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:47,677 INFO L482 AbstractCegarLoop]: Abstraction has 192 states and 636 transitions. [2021-06-05 04:44:47,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:47,677 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 636 transitions. [2021-06-05 04:44:47,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:44:47,678 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:47,678 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:47,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-05 04:44:47,678 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:47,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:47,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1029743448, now seen corresponding path program 1 times [2021-06-05 04:44:47,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:47,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402668780] [2021-06-05 04:44:47,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:47,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:47,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:47,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:47,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402668780] [2021-06-05 04:44:47,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402668780] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:44:47,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:44:47,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 04:44:47,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153524072] [2021-06-05 04:44:47,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 04:44:47,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:47,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 04:44:47,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 04:44:47,703 INFO L87 Difference]: Start difference. First operand 192 states and 636 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:47,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:47,708 INFO L93 Difference]: Finished difference Result 223 states and 739 transitions. [2021-06-05 04:44:47,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 04:44:47,709 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:44:47,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:47,710 INFO L225 Difference]: With dead ends: 223 [2021-06-05 04:44:47,710 INFO L226 Difference]: Without dead ends: 223 [2021-06-05 04:44:47,710 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 04:44:47,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-06-05 04:44:47,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2021-06-05 04:44:47,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 3.328828828828829) internal successors, (739), 222 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:47,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 739 transitions. [2021-06-05 04:44:47,717 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 739 transitions. Word has length 15 [2021-06-05 04:44:47,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:47,717 INFO L482 AbstractCegarLoop]: Abstraction has 223 states and 739 transitions. [2021-06-05 04:44:47,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:47,718 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 739 transitions. [2021-06-05 04:44:47,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:44:47,718 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:47,718 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:47,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-05 04:44:47,719 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:47,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:47,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1505443044, now seen corresponding path program 1 times [2021-06-05 04:44:47,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:47,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787704593] [2021-06-05 04:44:47,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:47,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:47,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:44:47,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:47,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787704593] [2021-06-05 04:44:47,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787704593] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:44:47,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:44:47,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 04:44:47,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537630645] [2021-06-05 04:44:47,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 04:44:47,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:47,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 04:44:47,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 04:44:47,761 INFO L87 Difference]: Start difference. First operand 223 states and 739 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:47,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:47,807 INFO L93 Difference]: Finished difference Result 414 states and 1238 transitions. [2021-06-05 04:44:47,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 04:44:47,809 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:44:47,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:47,811 INFO L225 Difference]: With dead ends: 414 [2021-06-05 04:44:47,811 INFO L226 Difference]: Without dead ends: 366 [2021-06-05 04:44:47,812 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 22.7ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 04:44:47,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-06-05 04:44:47,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 223. [2021-06-05 04:44:47,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 3.3063063063063063) internal successors, (734), 222 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:47,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 734 transitions. [2021-06-05 04:44:47,822 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 734 transitions. Word has length 16 [2021-06-05 04:44:47,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:47,823 INFO L482 AbstractCegarLoop]: Abstraction has 223 states and 734 transitions. [2021-06-05 04:44:47,824 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:47,824 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 734 transitions. [2021-06-05 04:44:47,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:44:47,824 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:47,826 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:47,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-05 04:44:47,826 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:47,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:47,827 INFO L82 PathProgramCache]: Analyzing trace with hash 821727578, now seen corresponding path program 1 times [2021-06-05 04:44:47,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:47,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025742655] [2021-06-05 04:44:47,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:47,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:47,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:44:47,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:47,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025742655] [2021-06-05 04:44:47,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025742655] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:44:47,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:44:47,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 04:44:47,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131522704] [2021-06-05 04:44:47,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 04:44:47,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:47,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 04:44:47,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 04:44:47,882 INFO L87 Difference]: Start difference. First operand 223 states and 734 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:47,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:47,948 INFO L93 Difference]: Finished difference Result 571 states and 1740 transitions. [2021-06-05 04:44:47,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 04:44:47,949 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:44:47,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:47,951 INFO L225 Difference]: With dead ends: 571 [2021-06-05 04:44:47,952 INFO L226 Difference]: Without dead ends: 495 [2021-06-05 04:44:47,952 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.4ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-05 04:44:47,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-06-05 04:44:47,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 233. [2021-06-05 04:44:47,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 3.2456896551724137) internal successors, (753), 232 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:47,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 753 transitions. [2021-06-05 04:44:47,961 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 753 transitions. Word has length 16 [2021-06-05 04:44:47,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:47,961 INFO L482 AbstractCegarLoop]: Abstraction has 233 states and 753 transitions. [2021-06-05 04:44:47,961 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:47,961 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 753 transitions. [2021-06-05 04:44:47,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:44:47,962 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:47,962 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:47,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-06-05 04:44:47,962 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:47,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:47,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1911442418, now seen corresponding path program 2 times [2021-06-05 04:44:47,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:47,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100994042] [2021-06-05 04:44:47,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:47,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:48,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:44:48,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:48,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100994042] [2021-06-05 04:44:48,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100994042] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:44:48,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:44:48,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 04:44:48,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94724583] [2021-06-05 04:44:48,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 04:44:48,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:48,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 04:44:48,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 04:44:48,013 INFO L87 Difference]: Start difference. First operand 233 states and 753 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:48,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:48,027 INFO L93 Difference]: Finished difference Result 347 states and 1054 transitions. [2021-06-05 04:44:48,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 04:44:48,028 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:44:48,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:48,029 INFO L225 Difference]: With dead ends: 347 [2021-06-05 04:44:48,029 INFO L226 Difference]: Without dead ends: 283 [2021-06-05 04:44:48,030 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 04:44:48,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-06-05 04:44:48,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 230. [2021-06-05 04:44:48,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 3.2620087336244543) internal successors, (747), 229 states have internal predecessors, (747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:48,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 747 transitions. [2021-06-05 04:44:48,037 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 747 transitions. Word has length 16 [2021-06-05 04:44:48,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:48,037 INFO L482 AbstractCegarLoop]: Abstraction has 230 states and 747 transitions. [2021-06-05 04:44:48,037 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:48,037 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 747 transitions. [2021-06-05 04:44:48,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:44:48,038 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:48,038 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:48,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-06-05 04:44:48,038 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:48,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:48,039 INFO L82 PathProgramCache]: Analyzing trace with hash -2095449492, now seen corresponding path program 1 times [2021-06-05 04:44:48,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:48,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755300157] [2021-06-05 04:44:48,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:48,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:48,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:48,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:48,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755300157] [2021-06-05 04:44:48,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755300157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:48,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128000896] [2021-06-05 04:44:48,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:48,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:48,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 04:44:48,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:48,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:48,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128000896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:48,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:48,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-06-05 04:44:48,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466239230] [2021-06-05 04:44:48,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:44:48,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:48,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:44:48,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:44:48,247 INFO L87 Difference]: Start difference. First operand 230 states and 747 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:48,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:48,376 INFO L93 Difference]: Finished difference Result 529 states and 1519 transitions. [2021-06-05 04:44:48,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:44:48,376 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:44:48,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:48,378 INFO L225 Difference]: With dead ends: 529 [2021-06-05 04:44:48,379 INFO L226 Difference]: Without dead ends: 455 [2021-06-05 04:44:48,379 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 73.8ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:44:48,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2021-06-05 04:44:48,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 240. [2021-06-05 04:44:48,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 3.1380753138075312) internal successors, (750), 239 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:48,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 750 transitions. [2021-06-05 04:44:48,392 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 750 transitions. Word has length 16 [2021-06-05 04:44:48,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:48,393 INFO L482 AbstractCegarLoop]: Abstraction has 240 states and 750 transitions. [2021-06-05 04:44:48,393 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:48,393 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 750 transitions. [2021-06-05 04:44:48,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:44:48,394 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:48,394 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:48,611 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-06-05 04:44:48,612 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:48,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:48,612 INFO L82 PathProgramCache]: Analyzing trace with hash 364875434, now seen corresponding path program 3 times [2021-06-05 04:44:48,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:48,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930823939] [2021-06-05 04:44:48,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:48,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:48,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:44:48,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:48,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930823939] [2021-06-05 04:44:48,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930823939] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:44:48,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:44:48,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 04:44:48,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514801469] [2021-06-05 04:44:48,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 04:44:48,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:48,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 04:44:48,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 04:44:48,639 INFO L87 Difference]: Start difference. First operand 240 states and 750 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:48,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:48,664 INFO L93 Difference]: Finished difference Result 335 states and 978 transitions. [2021-06-05 04:44:48,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 04:44:48,665 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:44:48,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:48,667 INFO L225 Difference]: With dead ends: 335 [2021-06-05 04:44:48,667 INFO L226 Difference]: Without dead ends: 263 [2021-06-05 04:44:48,667 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 04:44:48,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-06-05 04:44:48,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 234. [2021-06-05 04:44:48,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 3.0257510729613735) internal successors, (705), 233 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:48,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 705 transitions. [2021-06-05 04:44:48,674 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 705 transitions. Word has length 16 [2021-06-05 04:44:48,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:48,675 INFO L482 AbstractCegarLoop]: Abstraction has 234 states and 705 transitions. [2021-06-05 04:44:48,675 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:48,675 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 705 transitions. [2021-06-05 04:44:48,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:44:48,676 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:48,676 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:48,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-06-05 04:44:48,676 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:48,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:48,676 INFO L82 PathProgramCache]: Analyzing trace with hash -792720916, now seen corresponding path program 2 times [2021-06-05 04:44:48,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:48,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200730006] [2021-06-05 04:44:48,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:48,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:48,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:44:48,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:48,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200730006] [2021-06-05 04:44:48,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200730006] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:44:48,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:44:48,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 04:44:48,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728059347] [2021-06-05 04:44:48,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 04:44:48,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:48,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 04:44:48,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 04:44:48,728 INFO L87 Difference]: Start difference. First operand 234 states and 705 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:48,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:48,749 INFO L93 Difference]: Finished difference Result 314 states and 885 transitions. [2021-06-05 04:44:48,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 04:44:48,750 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:44:48,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:48,751 INFO L225 Difference]: With dead ends: 314 [2021-06-05 04:44:48,751 INFO L226 Difference]: Without dead ends: 244 [2021-06-05 04:44:48,751 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.1ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 04:44:48,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-06-05 04:44:48,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 213. [2021-06-05 04:44:48,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.9669811320754715) internal successors, (629), 212 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:48,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 629 transitions. [2021-06-05 04:44:48,757 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 629 transitions. Word has length 16 [2021-06-05 04:44:48,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:48,757 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 629 transitions. [2021-06-05 04:44:48,757 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:48,758 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 629 transitions. [2021-06-05 04:44:48,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:44:48,758 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:48,758 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:48,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-06-05 04:44:48,758 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:48,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:48,759 INFO L82 PathProgramCache]: Analyzing trace with hash -507279316, now seen corresponding path program 2 times [2021-06-05 04:44:48,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:48,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812603306] [2021-06-05 04:44:48,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:48,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:48,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:44:48,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:48,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812603306] [2021-06-05 04:44:48,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812603306] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:44:48,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:44:48,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 04:44:48,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924559168] [2021-06-05 04:44:48,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 04:44:48,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:48,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 04:44:48,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 04:44:48,812 INFO L87 Difference]: Start difference. First operand 213 states and 629 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:48,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:48,855 INFO L93 Difference]: Finished difference Result 281 states and 773 transitions. [2021-06-05 04:44:48,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 04:44:48,855 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:44:48,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:48,857 INFO L225 Difference]: With dead ends: 281 [2021-06-05 04:44:48,857 INFO L226 Difference]: Without dead ends: 240 [2021-06-05 04:44:48,857 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 21.8ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 04:44:48,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-06-05 04:44:48,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 209. [2021-06-05 04:44:48,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.985576923076923) internal successors, (621), 208 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:48,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 621 transitions. [2021-06-05 04:44:48,863 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 621 transitions. Word has length 16 [2021-06-05 04:44:48,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:48,863 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 621 transitions. [2021-06-05 04:44:48,864 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:48,864 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 621 transitions. [2021-06-05 04:44:48,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:44:48,866 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:48,866 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:48,866 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-06-05 04:44:48,866 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:48,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:48,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1232360210, now seen corresponding path program 3 times [2021-06-05 04:44:48,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:48,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240919068] [2021-06-05 04:44:48,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:48,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:48,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:44:48,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:48,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240919068] [2021-06-05 04:44:48,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240919068] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:44:48,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:44:48,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 04:44:48,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693541133] [2021-06-05 04:44:48,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 04:44:48,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:48,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 04:44:48,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 04:44:48,900 INFO L87 Difference]: Start difference. First operand 209 states and 621 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:48,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:48,939 INFO L93 Difference]: Finished difference Result 238 states and 670 transitions. [2021-06-05 04:44:48,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 04:44:48,940 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:44:48,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:48,942 INFO L225 Difference]: With dead ends: 238 [2021-06-05 04:44:48,942 INFO L226 Difference]: Without dead ends: 189 [2021-06-05 04:44:48,943 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.2ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:44:48,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-06-05 04:44:48,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2021-06-05 04:44:48,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.9202127659574466) internal successors, (549), 188 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:48,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 549 transitions. [2021-06-05 04:44:48,948 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 549 transitions. Word has length 16 [2021-06-05 04:44:48,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:48,948 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 549 transitions. [2021-06-05 04:44:48,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:48,949 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 549 transitions. [2021-06-05 04:44:48,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:48,949 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:48,949 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:48,950 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-06-05 04:44:48,950 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:48,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:48,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1392682474, now seen corresponding path program 1 times [2021-06-05 04:44:48,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:48,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541480197] [2021-06-05 04:44:48,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:48,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:49,220 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:49,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:49,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541480197] [2021-06-05 04:44:49,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541480197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:49,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027971901] [2021-06-05 04:44:49,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:49,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:49,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:44:49,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:49,649 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:44:49,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027971901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:49,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:49,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2021-06-05 04:44:49,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929460065] [2021-06-05 04:44:49,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:44:49,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:49,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:44:49,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:44:49,652 INFO L87 Difference]: Start difference. First operand 189 states and 549 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:50,929 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2021-06-05 04:44:51,102 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 46 [2021-06-05 04:44:51,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:51,290 INFO L93 Difference]: Finished difference Result 577 states and 1611 transitions. [2021-06-05 04:44:51,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:44:51,290 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:44:51,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:51,294 INFO L225 Difference]: With dead ends: 577 [2021-06-05 04:44:51,294 INFO L226 Difference]: Without dead ends: 486 [2021-06-05 04:44:51,294 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 1561.0ms TimeCoverageRelationStatistics Valid=208, Invalid=662, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:44:51,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-06-05 04:44:51,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 243. [2021-06-05 04:44:51,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 2.9545454545454546) internal successors, (715), 242 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:51,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 715 transitions. [2021-06-05 04:44:51,302 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 715 transitions. Word has length 20 [2021-06-05 04:44:51,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:51,302 INFO L482 AbstractCegarLoop]: Abstraction has 243 states and 715 transitions. [2021-06-05 04:44:51,303 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:51,303 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 715 transitions. [2021-06-05 04:44:51,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:51,303 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:51,303 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:51,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 04:44:51,517 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:51,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:51,517 INFO L82 PathProgramCache]: Analyzing trace with hash 56489052, now seen corresponding path program 2 times [2021-06-05 04:44:51,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:51,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605006426] [2021-06-05 04:44:51,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:51,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:51,677 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:51,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:51,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605006426] [2021-06-05 04:44:51,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605006426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:51,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529582738] [2021-06-05 04:44:51,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:51,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:44:51,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:51,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:44:51,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:52,094 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:44:52,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529582738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:52,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:52,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-06-05 04:44:52,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284048862] [2021-06-05 04:44:52,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:44:52,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:52,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:44:52,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:44:52,096 INFO L87 Difference]: Start difference. First operand 243 states and 715 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:53,447 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2021-06-05 04:44:54,027 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-06-05 04:44:54,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:54,352 INFO L93 Difference]: Finished difference Result 801 states and 2205 transitions. [2021-06-05 04:44:54,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 04:44:54,353 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:44:54,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:54,356 INFO L225 Difference]: With dead ends: 801 [2021-06-05 04:44:54,356 INFO L226 Difference]: Without dead ends: 633 [2021-06-05 04:44:54,357 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 2088.8ms TimeCoverageRelationStatistics Valid=284, Invalid=1122, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 04:44:54,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2021-06-05 04:44:54,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 284. [2021-06-05 04:44:54,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 2.954063604240283) internal successors, (836), 283 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:54,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 836 transitions. [2021-06-05 04:44:54,367 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 836 transitions. Word has length 20 [2021-06-05 04:44:54,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:54,367 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 836 transitions. [2021-06-05 04:44:54,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:54,367 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 836 transitions. [2021-06-05 04:44:54,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:54,368 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:54,368 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:54,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:54,585 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:54,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:54,585 INFO L82 PathProgramCache]: Analyzing trace with hash 2054143060, now seen corresponding path program 3 times [2021-06-05 04:44:54,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:54,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099735346] [2021-06-05 04:44:54,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:54,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:54,783 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:54,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:54,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099735346] [2021-06-05 04:44:54,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099735346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:54,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403344365] [2021-06-05 04:44:54,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:54,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:44:54,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:54,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:44:54,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:55,154 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:44:55,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403344365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:55,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:55,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2021-06-05 04:44:55,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127767946] [2021-06-05 04:44:55,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:44:55,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:55,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:44:55,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:44:55,158 INFO L87 Difference]: Start difference. First operand 284 states and 836 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:56,654 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2021-06-05 04:44:57,122 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2021-06-05 04:44:57,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:57,198 INFO L93 Difference]: Finished difference Result 766 states and 2175 transitions. [2021-06-05 04:44:57,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:44:57,199 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:44:57,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:57,202 INFO L225 Difference]: With dead ends: 766 [2021-06-05 04:44:57,202 INFO L226 Difference]: Without dead ends: 654 [2021-06-05 04:44:57,203 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 1846.9ms TimeCoverageRelationStatistics Valid=281, Invalid=1051, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 04:44:57,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2021-06-05 04:44:57,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 303. [2021-06-05 04:44:57,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 2.9205298013245033) internal successors, (882), 302 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:57,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 882 transitions. [2021-06-05 04:44:57,213 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 882 transitions. Word has length 20 [2021-06-05 04:44:57,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:57,214 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 882 transitions. [2021-06-05 04:44:57,214 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:57,214 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 882 transitions. [2021-06-05 04:44:57,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:57,214 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:57,215 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:57,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:57,429 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:57,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:57,429 INFO L82 PathProgramCache]: Analyzing trace with hash 585717068, now seen corresponding path program 4 times [2021-06-05 04:44:57,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:57,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040960353] [2021-06-05 04:44:57,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:57,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:57,674 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:57,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:57,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040960353] [2021-06-05 04:44:57,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040960353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:57,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469886371] [2021-06-05 04:44:57,675 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:57,714 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:44:57,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:57,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:44:57,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:58,073 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:44:58,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469886371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:58,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:58,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-06-05 04:44:58,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941085985] [2021-06-05 04:44:58,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:44:58,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:58,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:44:58,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:44:58,075 INFO L87 Difference]: Start difference. First operand 303 states and 882 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:59,379 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 40 [2021-06-05 04:44:59,991 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 38 [2021-06-05 04:45:00,251 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2021-06-05 04:45:00,443 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2021-06-05 04:45:00,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:00,679 INFO L93 Difference]: Finished difference Result 971 states and 2714 transitions. [2021-06-05 04:45:00,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 04:45:00,680 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:45:00,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:00,683 INFO L225 Difference]: With dead ends: 971 [2021-06-05 04:45:00,684 INFO L226 Difference]: Without dead ends: 736 [2021-06-05 04:45:00,684 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 2488.3ms TimeCoverageRelationStatistics Valid=359, Invalid=1363, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 04:45:00,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2021-06-05 04:45:00,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 362. [2021-06-05 04:45:00,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 3.0554016620498614) internal successors, (1103), 361 states have internal predecessors, (1103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:00,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 1103 transitions. [2021-06-05 04:45:00,694 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 1103 transitions. Word has length 20 [2021-06-05 04:45:00,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:00,695 INFO L482 AbstractCegarLoop]: Abstraction has 362 states and 1103 transitions. [2021-06-05 04:45:00,695 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:00,695 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 1103 transitions. [2021-06-05 04:45:00,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:00,697 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:00,697 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:00,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-05 04:45:00,927 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:00,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:00,928 INFO L82 PathProgramCache]: Analyzing trace with hash -2103334614, now seen corresponding path program 5 times [2021-06-05 04:45:00,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:00,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103103721] [2021-06-05 04:45:00,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:00,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:01,175 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:01,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:01,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103103721] [2021-06-05 04:45:01,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103103721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:01,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98751290] [2021-06-05 04:45:01,176 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:01,228 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:45:01,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:01,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:45:01,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:01,464 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:45:01,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98751290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:01,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:01,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-06-05 04:45:01,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956729037] [2021-06-05 04:45:01,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:45:01,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:01,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:45:01,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:45:01,466 INFO L87 Difference]: Start difference. First operand 362 states and 1103 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:02,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:02,758 INFO L93 Difference]: Finished difference Result 667 states and 1967 transitions. [2021-06-05 04:45:02,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 04:45:02,759 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:45:02,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:02,762 INFO L225 Difference]: With dead ends: 667 [2021-06-05 04:45:02,762 INFO L226 Difference]: Without dead ends: 592 [2021-06-05 04:45:02,764 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 1119.0ms TimeCoverageRelationStatistics Valid=240, Invalid=1092, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 04:45:02,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-06-05 04:45:02,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 368. [2021-06-05 04:45:02,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 3.0544959128065394) internal successors, (1121), 367 states have internal predecessors, (1121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:02,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 1121 transitions. [2021-06-05 04:45:02,776 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 1121 transitions. Word has length 20 [2021-06-05 04:45:02,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:02,776 INFO L482 AbstractCegarLoop]: Abstraction has 368 states and 1121 transitions. [2021-06-05 04:45:02,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:02,777 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 1121 transitions. [2021-06-05 04:45:02,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:02,777 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:02,777 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:03,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:03,007 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:03,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:03,007 INFO L82 PathProgramCache]: Analyzing trace with hash -927843970, now seen corresponding path program 6 times [2021-06-05 04:45:03,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:03,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40470935] [2021-06-05 04:45:03,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:03,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:03,138 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:03,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:03,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40470935] [2021-06-05 04:45:03,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40470935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:03,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273220385] [2021-06-05 04:45:03,139 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:03,193 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:45:03,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:03,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:45:03,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:03,483 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:45:03,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273220385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:03,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:03,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 04:45:03,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644964603] [2021-06-05 04:45:03,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:45:03,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:03,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:45:03,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:45:03,485 INFO L87 Difference]: Start difference. First operand 368 states and 1121 transitions. Second operand has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:03,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:03,794 INFO L93 Difference]: Finished difference Result 643 states and 1884 transitions. [2021-06-05 04:45:03,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:45:03,794 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:45:03,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:03,797 INFO L225 Difference]: With dead ends: 643 [2021-06-05 04:45:03,797 INFO L226 Difference]: Without dead ends: 565 [2021-06-05 04:45:03,797 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 379.3ms TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:45:03,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-06-05 04:45:03,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 374. [2021-06-05 04:45:03,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 373 states have (on average 3.06970509383378) internal successors, (1145), 373 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:03,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 1145 transitions. [2021-06-05 04:45:03,807 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 1145 transitions. Word has length 20 [2021-06-05 04:45:03,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:03,807 INFO L482 AbstractCegarLoop]: Abstraction has 374 states and 1145 transitions. [2021-06-05 04:45:03,807 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:03,807 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 1145 transitions. [2021-06-05 04:45:03,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:03,808 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:03,808 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:04,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:04,031 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:04,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:04,032 INFO L82 PathProgramCache]: Analyzing trace with hash 685722764, now seen corresponding path program 7 times [2021-06-05 04:45:04,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:04,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168634575] [2021-06-05 04:45:04,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:04,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:04,221 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:04,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:04,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168634575] [2021-06-05 04:45:04,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168634575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:04,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728474215] [2021-06-05 04:45:04,222 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:04,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:04,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:45:04,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:04,849 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1, ends_with_6], 1=[ends_with_2]} [2021-06-05 04:45:04,863 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:45:04,864 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:04,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:45:04,874 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:04,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:45:04,879 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:04,883 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:45:04,884 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:04,888 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:45:04,889 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:04,894 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:45:04,895 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:04,967 INFO L628 ElimStorePlain]: treesize reduction 83, result has 46.1 percent of original size [2021-06-05 04:45:04,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:45:04,977 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:05,014 INFO L628 ElimStorePlain]: treesize reduction 25, result has 63.2 percent of original size [2021-06-05 04:45:05,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:45:05,018 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:05,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:45:05,022 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:05,037 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:05,043 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:45:05,044 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 4 variables, input treesize:278, output treesize:20 [2021-06-05 04:45:05,130 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:45:05,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728474215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:05,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:05,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2021-06-05 04:45:05,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024934494] [2021-06-05 04:45:05,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:45:05,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:05,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:45:05,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:45:05,132 INFO L87 Difference]: Start difference. First operand 374 states and 1145 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:05,995 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2021-06-05 04:45:06,262 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2021-06-05 04:45:06,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:06,476 INFO L93 Difference]: Finished difference Result 613 states and 1787 transitions. [2021-06-05 04:45:06,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 04:45:06,476 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:45:06,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:06,478 INFO L225 Difference]: With dead ends: 613 [2021-06-05 04:45:06,478 INFO L226 Difference]: Without dead ends: 553 [2021-06-05 04:45:06,479 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 1236.6ms TimeCoverageRelationStatistics Valid=188, Invalid=868, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:45:06,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-06-05 04:45:06,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 384. [2021-06-05 04:45:06,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 3.0548302872062663) internal successors, (1170), 383 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:06,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1170 transitions. [2021-06-05 04:45:06,487 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1170 transitions. Word has length 20 [2021-06-05 04:45:06,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:06,487 INFO L482 AbstractCegarLoop]: Abstraction has 384 states and 1170 transitions. [2021-06-05 04:45:06,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:06,487 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1170 transitions. [2021-06-05 04:45:06,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:06,488 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:06,488 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:06,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-06-05 04:45:06,711 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:06,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:06,711 INFO L82 PathProgramCache]: Analyzing trace with hash 504067178, now seen corresponding path program 8 times [2021-06-05 04:45:06,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:06,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854485861] [2021-06-05 04:45:06,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:06,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:06,791 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:45:06,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:06,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854485861] [2021-06-05 04:45:06,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854485861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:06,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102044625] [2021-06-05 04:45:06,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:06,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:45:06,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:06,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:45:06,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:07,099 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:45:07,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102044625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:07,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:07,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 04:45:07,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403015716] [2021-06-05 04:45:07,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:45:07,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:07,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:45:07,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:45:07,101 INFO L87 Difference]: Start difference. First operand 384 states and 1170 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:07,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:07,410 INFO L93 Difference]: Finished difference Result 663 states and 1941 transitions. [2021-06-05 04:45:07,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:45:07,410 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:45:07,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:07,412 INFO L225 Difference]: With dead ends: 663 [2021-06-05 04:45:07,412 INFO L226 Difference]: Without dead ends: 537 [2021-06-05 04:45:07,412 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 371.5ms TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:45:07,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2021-06-05 04:45:07,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 389. [2021-06-05 04:45:07,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 3.054123711340206) internal successors, (1185), 388 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:07,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 1185 transitions. [2021-06-05 04:45:07,421 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 1185 transitions. Word has length 20 [2021-06-05 04:45:07,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:07,421 INFO L482 AbstractCegarLoop]: Abstraction has 389 states and 1185 transitions. [2021-06-05 04:45:07,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:07,422 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 1185 transitions. [2021-06-05 04:45:07,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:07,422 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:07,423 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:07,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:07,646 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:07,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:07,646 INFO L82 PathProgramCache]: Analyzing trace with hash -1287248534, now seen corresponding path program 9 times [2021-06-05 04:45:07,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:07,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438880934] [2021-06-05 04:45:07,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:07,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:07,747 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:45:07,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:07,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438880934] [2021-06-05 04:45:07,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438880934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:07,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721470943] [2021-06-05 04:45:07,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:07,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:45:07,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:07,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:45:07,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:08,116 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:45:08,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721470943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:08,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:08,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 04:45:08,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120353957] [2021-06-05 04:45:08,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:45:08,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:08,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:45:08,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:45:08,118 INFO L87 Difference]: Start difference. First operand 389 states and 1185 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:08,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:08,715 INFO L93 Difference]: Finished difference Result 865 states and 2507 transitions. [2021-06-05 04:45:08,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:45:08,715 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:45:08,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:08,718 INFO L225 Difference]: With dead ends: 865 [2021-06-05 04:45:08,718 INFO L226 Difference]: Without dead ends: 722 [2021-06-05 04:45:08,718 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 671.4ms TimeCoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:45:08,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2021-06-05 04:45:08,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 395. [2021-06-05 04:45:08,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 3.068527918781726) internal successors, (1209), 394 states have internal predecessors, (1209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:08,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 1209 transitions. [2021-06-05 04:45:08,727 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 1209 transitions. Word has length 20 [2021-06-05 04:45:08,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:08,727 INFO L482 AbstractCegarLoop]: Abstraction has 395 states and 1209 transitions. [2021-06-05 04:45:08,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:08,727 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 1209 transitions. [2021-06-05 04:45:08,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:08,728 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:08,728 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:08,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-06-05 04:45:08,945 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:08,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:08,945 INFO L82 PathProgramCache]: Analyzing trace with hash 326318200, now seen corresponding path program 10 times [2021-06-05 04:45:08,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:08,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054024389] [2021-06-05 04:45:08,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:08,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:09,033 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:45:09,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:09,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054024389] [2021-06-05 04:45:09,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054024389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:09,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134888115] [2021-06-05 04:45:09,034 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:09,070 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:45:09,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:09,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:45:09,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:09,357 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:45:09,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134888115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:09,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:09,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 04:45:09,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798896053] [2021-06-05 04:45:09,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:45:09,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:09,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:45:09,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:45:09,358 INFO L87 Difference]: Start difference. First operand 395 states and 1209 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:09,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:09,675 INFO L93 Difference]: Finished difference Result 717 states and 2094 transitions. [2021-06-05 04:45:09,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:45:09,675 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:45:09,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:09,677 INFO L225 Difference]: With dead ends: 717 [2021-06-05 04:45:09,677 INFO L226 Difference]: Without dead ends: 558 [2021-06-05 04:45:09,677 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 432.1ms TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:45:09,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-06-05 04:45:09,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 389. [2021-06-05 04:45:09,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 3.054123711340206) internal successors, (1185), 388 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:09,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 1185 transitions. [2021-06-05 04:45:09,686 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 1185 transitions. Word has length 20 [2021-06-05 04:45:09,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:09,686 INFO L482 AbstractCegarLoop]: Abstraction has 389 states and 1185 transitions. [2021-06-05 04:45:09,686 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:09,686 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 1185 transitions. [2021-06-05 04:45:09,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:09,687 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:09,687 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:09,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-06-05 04:45:09,893 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:09,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:09,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1731378416, now seen corresponding path program 11 times [2021-06-05 04:45:09,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:09,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109296886] [2021-06-05 04:45:09,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:09,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:09,998 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:45:09,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:09,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109296886] [2021-06-05 04:45:09,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109296886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:09,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889707273] [2021-06-05 04:45:09,998 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:10,042 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:45:10,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:10,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:45:10,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:10,310 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:45:10,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889707273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:10,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:10,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 04:45:10,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233556542] [2021-06-05 04:45:10,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:45:10,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:10,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:45:10,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:45:10,311 INFO L87 Difference]: Start difference. First operand 389 states and 1185 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:12,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:12,137 INFO L93 Difference]: Finished difference Result 980 states and 2855 transitions. [2021-06-05 04:45:12,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 04:45:12,137 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:45:12,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:12,139 INFO L225 Difference]: With dead ends: 980 [2021-06-05 04:45:12,140 INFO L226 Difference]: Without dead ends: 780 [2021-06-05 04:45:12,140 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 1615.0ms TimeCoverageRelationStatistics Valid=342, Invalid=1464, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 04:45:12,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2021-06-05 04:45:12,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 442. [2021-06-05 04:45:12,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 441 states have (on average 3.0657596371882088) internal successors, (1352), 441 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:12,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 1352 transitions. [2021-06-05 04:45:12,161 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 1352 transitions. Word has length 20 [2021-06-05 04:45:12,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:12,162 INFO L482 AbstractCegarLoop]: Abstraction has 442 states and 1352 transitions. [2021-06-05 04:45:12,162 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:12,162 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 1352 transitions. [2021-06-05 04:45:12,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:12,163 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:12,163 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:12,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2021-06-05 04:45:12,387 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:12,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:12,387 INFO L82 PathProgramCache]: Analyzing trace with hash -852916892, now seen corresponding path program 12 times [2021-06-05 04:45:12,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:12,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511650746] [2021-06-05 04:45:12,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:12,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:12,468 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:12,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:12,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511650746] [2021-06-05 04:45:12,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511650746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:12,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524363163] [2021-06-05 04:45:12,469 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:12,529 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:45:12,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:12,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:45:12,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:12,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:45:12,618 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:12,694 INFO L628 ElimStorePlain]: treesize reduction 4, result has 95.5 percent of original size [2021-06-05 04:45:12,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:45:12,698 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:12,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:45:12,701 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:12,754 INFO L628 ElimStorePlain]: treesize reduction 18, result has 76.6 percent of original size [2021-06-05 04:45:12,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:45:12,761 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:12,786 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:12,786 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:45:12,787 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:91, output treesize:55 [2021-06-05 04:45:13,145 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:13,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524363163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:13,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:13,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 04:45:13,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608501396] [2021-06-05 04:45:13,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:45:13,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:13,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:45:13,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:45:13,146 INFO L87 Difference]: Start difference. First operand 442 states and 1352 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:13,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:13,537 INFO L93 Difference]: Finished difference Result 830 states and 2406 transitions. [2021-06-05 04:45:13,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:45:13,537 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:45:13,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:13,539 INFO L225 Difference]: With dead ends: 830 [2021-06-05 04:45:13,540 INFO L226 Difference]: Without dead ends: 687 [2021-06-05 04:45:13,540 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 508.5ms TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:45:13,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2021-06-05 04:45:13,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 452. [2021-06-05 04:45:13,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 451 states have (on average 3.0776053215077606) internal successors, (1388), 451 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:13,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 1388 transitions. [2021-06-05 04:45:13,550 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 1388 transitions. Word has length 20 [2021-06-05 04:45:13,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:13,551 INFO L482 AbstractCegarLoop]: Abstraction has 452 states and 1388 transitions. [2021-06-05 04:45:13,551 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:13,551 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 1388 transitions. [2021-06-05 04:45:13,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:13,552 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:13,552 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:13,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-06-05 04:45:13,765 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:13,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:13,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1463437194, now seen corresponding path program 13 times [2021-06-05 04:45:13,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:13,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898881418] [2021-06-05 04:45:13,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:13,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:13,857 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:13,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:13,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898881418] [2021-06-05 04:45:13,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898881418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:13,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720421436] [2021-06-05 04:45:13,857 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:13,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:13,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:45:13,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:14,164 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:14,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720421436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:14,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:14,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 04:45:14,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33425067] [2021-06-05 04:45:14,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:45:14,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:14,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:45:14,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:45:14,165 INFO L87 Difference]: Start difference. First operand 452 states and 1388 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:14,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:14,327 INFO L93 Difference]: Finished difference Result 595 states and 1752 transitions. [2021-06-05 04:45:14,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:45:14,327 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:45:14,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:14,330 INFO L225 Difference]: With dead ends: 595 [2021-06-05 04:45:14,330 INFO L226 Difference]: Without dead ends: 475 [2021-06-05 04:45:14,332 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 229.1ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:45:14,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-06-05 04:45:14,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 442. [2021-06-05 04:45:14,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 441 states have (on average 3.0657596371882088) internal successors, (1352), 441 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:14,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 1352 transitions. [2021-06-05 04:45:14,341 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 1352 transitions. Word has length 20 [2021-06-05 04:45:14,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:14,341 INFO L482 AbstractCegarLoop]: Abstraction has 442 states and 1352 transitions. [2021-06-05 04:45:14,341 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:14,341 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 1352 transitions. [2021-06-05 04:45:14,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:45:14,342 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:14,342 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:14,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:14,557 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:14,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:14,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1353227094, now seen corresponding path program 14 times [2021-06-05 04:45:14,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:14,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869122646] [2021-06-05 04:45:14,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:14,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:14,621 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:14,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:14,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869122646] [2021-06-05 04:45:14,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869122646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:14,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413357460] [2021-06-05 04:45:14,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:14,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:45:14,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:14,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:45:14,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:14,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:45:14,734 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:14,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:45:14,744 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:14,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:45:14,747 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:14,785 INFO L628 ElimStorePlain]: treesize reduction 23, result has 63.5 percent of original size [2021-06-05 04:45:14,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:45:14,789 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:14,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:45:14,793 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:14,821 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.0 percent of original size [2021-06-05 04:45:14,822 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:45:14,822 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:75, output treesize:19 [2021-06-05 04:45:14,878 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:45:14,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413357460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:14,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:14,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-05 04:45:14,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887961339] [2021-06-05 04:45:14,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:45:14,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:14,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:45:14,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:45:14,879 INFO L87 Difference]: Start difference. First operand 442 states and 1352 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:15,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:15,126 INFO L93 Difference]: Finished difference Result 699 states and 2099 transitions. [2021-06-05 04:45:15,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:45:15,127 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:45:15,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:15,130 INFO L225 Difference]: With dead ends: 699 [2021-06-05 04:45:15,131 INFO L226 Difference]: Without dead ends: 648 [2021-06-05 04:45:15,131 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 192.3ms TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:45:15,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2021-06-05 04:45:15,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 421. [2021-06-05 04:45:15,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 3.0904761904761906) internal successors, (1298), 420 states have internal predecessors, (1298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:15,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 1298 transitions. [2021-06-05 04:45:15,140 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 1298 transitions. Word has length 21 [2021-06-05 04:45:15,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:15,140 INFO L482 AbstractCegarLoop]: Abstraction has 421 states and 1298 transitions. [2021-06-05 04:45:15,140 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:15,141 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 1298 transitions. [2021-06-05 04:45:15,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:45:15,142 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:15,142 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:15,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable313 [2021-06-05 04:45:15,357 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:15,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:15,357 INFO L82 PathProgramCache]: Analyzing trace with hash -2142789994, now seen corresponding path program 15 times [2021-06-05 04:45:15,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:15,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060622382] [2021-06-05 04:45:15,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:15,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:15,445 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:15,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:15,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060622382] [2021-06-05 04:45:15,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060622382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:15,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471163529] [2021-06-05 04:45:15,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:15,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:45:15,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:15,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:45:15,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:15,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:45:15,584 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:15,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:45:15,588 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:15,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:45:15,592 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:15,636 INFO L628 ElimStorePlain]: treesize reduction 23, result has 63.5 percent of original size [2021-06-05 04:45:15,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:45:15,641 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:15,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:45:15,644 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:15,672 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.0 percent of original size [2021-06-05 04:45:15,673 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:45:15,673 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:75, output treesize:19 [2021-06-05 04:45:15,717 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:45:15,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471163529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:15,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:15,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-05 04:45:15,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549605758] [2021-06-05 04:45:15,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:45:15,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:15,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:45:15,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:45:15,718 INFO L87 Difference]: Start difference. First operand 421 states and 1298 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:15,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:15,954 INFO L93 Difference]: Finished difference Result 665 states and 2020 transitions. [2021-06-05 04:45:15,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:45:15,955 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:45:15,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:15,958 INFO L225 Difference]: With dead ends: 665 [2021-06-05 04:45:15,958 INFO L226 Difference]: Without dead ends: 614 [2021-06-05 04:45:15,958 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 213.4ms TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:45:15,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2021-06-05 04:45:15,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 432. [2021-06-05 04:45:15,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 3.1113689095127612) internal successors, (1341), 431 states have internal predecessors, (1341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:15,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 1341 transitions. [2021-06-05 04:45:15,966 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 1341 transitions. Word has length 21 [2021-06-05 04:45:15,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:15,967 INFO L482 AbstractCegarLoop]: Abstraction has 432 states and 1341 transitions. [2021-06-05 04:45:15,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:15,967 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 1341 transitions. [2021-06-05 04:45:15,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:45:15,968 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:15,968 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:16,191 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable319,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:16,192 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:16,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:16,192 INFO L82 PathProgramCache]: Analyzing trace with hash -967299350, now seen corresponding path program 16 times [2021-06-05 04:45:16,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:16,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841001865] [2021-06-05 04:45:16,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:16,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:16,270 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:16,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:16,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841001865] [2021-06-05 04:45:16,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841001865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:16,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585729123] [2021-06-05 04:45:16,271 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:16,323 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:45:16,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:16,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:45:16,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:16,442 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:45:16,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585729123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:16,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:16,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-06-05 04:45:16,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902306312] [2021-06-05 04:45:16,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:45:16,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:16,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:45:16,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:45:16,445 INFO L87 Difference]: Start difference. First operand 432 states and 1341 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:16,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:16,669 INFO L93 Difference]: Finished difference Result 728 states and 2188 transitions. [2021-06-05 04:45:16,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:45:16,669 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:45:16,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:16,672 INFO L225 Difference]: With dead ends: 728 [2021-06-05 04:45:16,672 INFO L226 Difference]: Without dead ends: 677 [2021-06-05 04:45:16,672 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 212.8ms TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:45:16,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2021-06-05 04:45:16,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 443. [2021-06-05 04:45:16,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 442 states have (on average 3.1561085972850678) internal successors, (1395), 442 states have internal predecessors, (1395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:16,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 1395 transitions. [2021-06-05 04:45:16,681 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 1395 transitions. Word has length 21 [2021-06-05 04:45:16,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:16,682 INFO L482 AbstractCegarLoop]: Abstraction has 443 states and 1395 transitions. [2021-06-05 04:45:16,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:16,682 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 1395 transitions. [2021-06-05 04:45:16,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:45:16,683 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:16,683 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:16,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable327 [2021-06-05 04:45:16,901 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:16,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:16,901 INFO L82 PathProgramCache]: Analyzing trace with hash 646267384, now seen corresponding path program 17 times [2021-06-05 04:45:16,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:16,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752263628] [2021-06-05 04:45:16,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:16,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:16,969 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:16,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:16,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752263628] [2021-06-05 04:45:16,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752263628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:16,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010301050] [2021-06-05 04:45:16,970 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:17,032 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:45:17,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:17,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:45:17,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:17,177 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:45:17,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010301050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:17,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:17,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 04:45:17,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488480915] [2021-06-05 04:45:17,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:45:17,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:17,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:45:17,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:45:17,178 INFO L87 Difference]: Start difference. First operand 443 states and 1395 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:17,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:17,483 INFO L93 Difference]: Finished difference Result 654 states and 1967 transitions. [2021-06-05 04:45:17,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:45:17,484 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:45:17,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:17,486 INFO L225 Difference]: With dead ends: 654 [2021-06-05 04:45:17,486 INFO L226 Difference]: Without dead ends: 591 [2021-06-05 04:45:17,487 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 285.9ms TimeCoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:45:17,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-06-05 04:45:17,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 413. [2021-06-05 04:45:17,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 3.0728155339805827) internal successors, (1266), 412 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:17,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1266 transitions. [2021-06-05 04:45:17,495 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1266 transitions. Word has length 21 [2021-06-05 04:45:17,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:17,495 INFO L482 AbstractCegarLoop]: Abstraction has 413 states and 1266 transitions. [2021-06-05 04:45:17,495 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:17,496 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1266 transitions. [2021-06-05 04:45:17,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:45:17,497 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:17,497 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:17,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2021-06-05 04:45:17,713 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:17,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:17,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1289968066, now seen corresponding path program 18 times [2021-06-05 04:45:17,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:17,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259283033] [2021-06-05 04:45:17,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:17,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:17,818 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:17,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:17,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259283033] [2021-06-05 04:45:17,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259283033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:17,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414698908] [2021-06-05 04:45:17,818 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:17,857 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:45:17,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:17,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:45:17,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:18,038 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:18,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414698908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:18,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:18,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 04:45:18,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042999500] [2021-06-05 04:45:18,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:45:18,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:18,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:45:18,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:45:18,039 INFO L87 Difference]: Start difference. First operand 413 states and 1266 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:18,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:18,484 INFO L93 Difference]: Finished difference Result 864 states and 2562 transitions. [2021-06-05 04:45:18,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:45:18,484 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:45:18,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:18,488 INFO L225 Difference]: With dead ends: 864 [2021-06-05 04:45:18,488 INFO L226 Difference]: Without dead ends: 812 [2021-06-05 04:45:18,488 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 425.4ms TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:45:18,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2021-06-05 04:45:18,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 458. [2021-06-05 04:45:18,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 3.1684901531728666) internal successors, (1448), 457 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:18,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 1448 transitions. [2021-06-05 04:45:18,498 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 1448 transitions. Word has length 21 [2021-06-05 04:45:18,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:18,498 INFO L482 AbstractCegarLoop]: Abstraction has 458 states and 1448 transitions. [2021-06-05 04:45:18,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:18,498 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 1448 transitions. [2021-06-05 04:45:18,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:45:18,499 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:18,499 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:18,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:18,705 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:18,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:18,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1898744654, now seen corresponding path program 19 times [2021-06-05 04:45:18,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:18,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134965724] [2021-06-05 04:45:18,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:18,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:18,818 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:18,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:18,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134965724] [2021-06-05 04:45:18,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134965724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:18,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631286174] [2021-06-05 04:45:18,819 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:18,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:18,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:45:18,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:19,057 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:19,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631286174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:19,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:19,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 04:45:19,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266217271] [2021-06-05 04:45:19,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:45:19,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:19,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:45:19,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:45:19,058 INFO L87 Difference]: Start difference. First operand 458 states and 1448 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:19,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:19,660 INFO L93 Difference]: Finished difference Result 906 states and 2628 transitions. [2021-06-05 04:45:19,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:45:19,660 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:45:19,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:19,662 INFO L225 Difference]: With dead ends: 906 [2021-06-05 04:45:19,662 INFO L226 Difference]: Without dead ends: 837 [2021-06-05 04:45:19,663 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 552.8ms TimeCoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:45:19,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 837 states. [2021-06-05 04:45:19,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 837 to 464. [2021-06-05 04:45:19,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 3.1295896328293735) internal successors, (1449), 463 states have internal predecessors, (1449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:19,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1449 transitions. [2021-06-05 04:45:19,674 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1449 transitions. Word has length 21 [2021-06-05 04:45:19,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:19,674 INFO L482 AbstractCegarLoop]: Abstraction has 464 states and 1449 transitions. [2021-06-05 04:45:19,674 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:19,674 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1449 transitions. [2021-06-05 04:45:19,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:45:19,675 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:19,675 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:19,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable348 [2021-06-05 04:45:19,890 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:19,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:19,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1066038364, now seen corresponding path program 20 times [2021-06-05 04:45:19,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:19,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159271457] [2021-06-05 04:45:19,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:19,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:19,984 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:19,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:19,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159271457] [2021-06-05 04:45:19,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159271457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:19,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892710197] [2021-06-05 04:45:19,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:20,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:45:20,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:20,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:45:20,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:20,219 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:20,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892710197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:20,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:20,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-06-05 04:45:20,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834047001] [2021-06-05 04:45:20,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:45:20,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:20,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:45:20,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:45:20,221 INFO L87 Difference]: Start difference. First operand 464 states and 1449 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:20,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:20,619 INFO L93 Difference]: Finished difference Result 795 states and 2331 transitions. [2021-06-05 04:45:20,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:45:20,620 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:45:20,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:20,621 INFO L225 Difference]: With dead ends: 795 [2021-06-05 04:45:20,621 INFO L226 Difference]: Without dead ends: 713 [2021-06-05 04:45:20,621 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 415.3ms TimeCoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:45:20,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2021-06-05 04:45:20,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 471. [2021-06-05 04:45:20,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 3.0914893617021275) internal successors, (1453), 470 states have internal predecessors, (1453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:20,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 1453 transitions. [2021-06-05 04:45:20,630 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 1453 transitions. Word has length 21 [2021-06-05 04:45:20,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:20,630 INFO L482 AbstractCegarLoop]: Abstraction has 471 states and 1453 transitions. [2021-06-05 04:45:20,630 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:20,630 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 1453 transitions. [2021-06-05 04:45:20,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:45:20,631 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:20,631 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:20,837 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable357 [2021-06-05 04:45:20,838 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:20,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:20,838 INFO L82 PathProgramCache]: Analyzing trace with hash 601158056, now seen corresponding path program 21 times [2021-06-05 04:45:20,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:20,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190324051] [2021-06-05 04:45:20,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:20,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:20,937 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:20,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:20,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190324051] [2021-06-05 04:45:20,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190324051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:20,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389631093] [2021-06-05 04:45:20,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:20,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:45:20,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:20,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:45:20,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:21,147 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:21,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389631093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:21,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:21,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 04:45:21,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695765296] [2021-06-05 04:45:21,147 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:45:21,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:21,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:45:21,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:45:21,148 INFO L87 Difference]: Start difference. First operand 471 states and 1453 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:21,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:21,617 INFO L93 Difference]: Finished difference Result 773 states and 2266 transitions. [2021-06-05 04:45:21,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:45:21,617 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:45:21,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:21,618 INFO L225 Difference]: With dead ends: 773 [2021-06-05 04:45:21,618 INFO L226 Difference]: Without dead ends: 672 [2021-06-05 04:45:21,618 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 469.7ms TimeCoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:45:21,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-06-05 04:45:21,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 462. [2021-06-05 04:45:21,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 461 states have (on average 3.0390455531453364) internal successors, (1401), 461 states have internal predecessors, (1401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:21,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 1401 transitions. [2021-06-05 04:45:21,627 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 1401 transitions. Word has length 21 [2021-06-05 04:45:21,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:21,627 INFO L482 AbstractCegarLoop]: Abstraction has 462 states and 1401 transitions. [2021-06-05 04:45:21,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:21,627 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 1401 transitions. [2021-06-05 04:45:21,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:45:21,628 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:21,629 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:21,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable366,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:21,845 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:21,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:21,845 INFO L82 PathProgramCache]: Analyzing trace with hash 454395940, now seen corresponding path program 22 times [2021-06-05 04:45:21,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:21,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420794452] [2021-06-05 04:45:21,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:21,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:21,945 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:21,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:21,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420794452] [2021-06-05 04:45:21,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420794452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:21,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338785273] [2021-06-05 04:45:21,946 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:22,001 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:45:22,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:22,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:45:22,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:22,152 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:22,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338785273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:22,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:22,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 04:45:22,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121379750] [2021-06-05 04:45:22,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:45:22,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:22,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:45:22,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:45:22,153 INFO L87 Difference]: Start difference. First operand 462 states and 1401 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:22,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:22,359 INFO L93 Difference]: Finished difference Result 807 states and 2396 transitions. [2021-06-05 04:45:22,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:45:22,359 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:45:22,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:22,360 INFO L225 Difference]: With dead ends: 807 [2021-06-05 04:45:22,360 INFO L226 Difference]: Without dead ends: 755 [2021-06-05 04:45:22,361 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 213.5ms TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:45:22,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2021-06-05 04:45:22,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 506. [2021-06-05 04:45:22,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 3.130693069306931) internal successors, (1581), 505 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:22,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1581 transitions. [2021-06-05 04:45:22,370 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1581 transitions. Word has length 21 [2021-06-05 04:45:22,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:22,370 INFO L482 AbstractCegarLoop]: Abstraction has 506 states and 1581 transitions. [2021-06-05 04:45:22,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:22,371 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1581 transitions. [2021-06-05 04:45:22,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:45:22,372 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:22,372 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:22,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable377 [2021-06-05 04:45:22,585 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:22,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:22,585 INFO L82 PathProgramCache]: Analyzing trace with hash -651858636, now seen corresponding path program 23 times [2021-06-05 04:45:22,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:22,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388292191] [2021-06-05 04:45:22,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:22,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:22,668 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:22,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:22,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388292191] [2021-06-05 04:45:22,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388292191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:22,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188553341] [2021-06-05 04:45:22,669 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:22,708 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:45:22,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:22,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:45:22,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:22,858 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:22,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188553341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:22,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:22,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-05 04:45:22,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846626667] [2021-06-05 04:45:22,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:45:22,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:22,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:45:22,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:45:22,860 INFO L87 Difference]: Start difference. First operand 506 states and 1581 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:23,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:23,229 INFO L93 Difference]: Finished difference Result 851 states and 2469 transitions. [2021-06-05 04:45:23,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:45:23,230 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:45:23,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:23,232 INFO L225 Difference]: With dead ends: 851 [2021-06-05 04:45:23,232 INFO L226 Difference]: Without dead ends: 782 [2021-06-05 04:45:23,232 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 335.5ms TimeCoverageRelationStatistics Valid=145, Invalid=505, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:45:23,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2021-06-05 04:45:23,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 491. [2021-06-05 04:45:23,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 490 states have (on average 3.0816326530612246) internal successors, (1510), 490 states have internal predecessors, (1510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:23,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 1510 transitions. [2021-06-05 04:45:23,243 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 1510 transitions. Word has length 21 [2021-06-05 04:45:23,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:23,243 INFO L482 AbstractCegarLoop]: Abstraction has 491 states and 1510 transitions. [2021-06-05 04:45:23,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:23,243 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 1510 transitions. [2021-06-05 04:45:23,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:45:23,244 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:23,244 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:23,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable389 [2021-06-05 04:45:23,467 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:23,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:23,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1484564926, now seen corresponding path program 24 times [2021-06-05 04:45:23,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:23,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721957599] [2021-06-05 04:45:23,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:23,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:23,583 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:23,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:23,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721957599] [2021-06-05 04:45:23,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721957599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:23,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821813208] [2021-06-05 04:45:23,583 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:23,622 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:45:23,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:23,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:45:23,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:23,793 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:23,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821813208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:23,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:23,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2021-06-05 04:45:23,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901148516] [2021-06-05 04:45:23,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:45:23,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:23,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:45:23,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:45:23,794 INFO L87 Difference]: Start difference. First operand 491 states and 1510 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:24,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:24,075 INFO L93 Difference]: Finished difference Result 682 states and 1999 transitions. [2021-06-05 04:45:24,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:45:24,075 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:45:24,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:24,076 INFO L225 Difference]: With dead ends: 682 [2021-06-05 04:45:24,076 INFO L226 Difference]: Without dead ends: 600 [2021-06-05 04:45:24,076 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 287.6ms TimeCoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:45:24,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2021-06-05 04:45:24,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 476. [2021-06-05 04:45:24,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 3.0442105263157893) internal successors, (1446), 475 states have internal predecessors, (1446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:24,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 1446 transitions. [2021-06-05 04:45:24,084 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 1446 transitions. Word has length 21 [2021-06-05 04:45:24,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:24,084 INFO L482 AbstractCegarLoop]: Abstraction has 476 states and 1446 transitions. [2021-06-05 04:45:24,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:24,084 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 1446 transitions. [2021-06-05 04:45:24,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:45:24,085 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:24,085 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:24,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable399 [2021-06-05 04:45:24,307 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:24,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:24,308 INFO L82 PathProgramCache]: Analyzing trace with hash -818537768, now seen corresponding path program 25 times [2021-06-05 04:45:24,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:24,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679233213] [2021-06-05 04:45:24,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:24,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:24,395 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:24,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:24,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679233213] [2021-06-05 04:45:24,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679233213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:24,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838879483] [2021-06-05 04:45:24,395 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:24,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:24,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:45:24,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:24,571 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:24,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838879483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:24,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:24,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 04:45:24,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521146403] [2021-06-05 04:45:24,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:45:24,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:24,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:45:24,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:45:24,573 INFO L87 Difference]: Start difference. First operand 476 states and 1446 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:24,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:24,850 INFO L93 Difference]: Finished difference Result 853 states and 2541 transitions. [2021-06-05 04:45:24,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:45:24,850 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:45:24,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:24,851 INFO L225 Difference]: With dead ends: 853 [2021-06-05 04:45:24,851 INFO L226 Difference]: Without dead ends: 801 [2021-06-05 04:45:24,852 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 214.0ms TimeCoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:45:24,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 801 states. [2021-06-05 04:45:24,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 801 to 514. [2021-06-05 04:45:24,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 513 states have (on average 3.142300194931774) internal successors, (1612), 513 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:24,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 1612 transitions. [2021-06-05 04:45:24,860 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 1612 transitions. Word has length 21 [2021-06-05 04:45:24,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:24,861 INFO L482 AbstractCegarLoop]: Abstraction has 514 states and 1612 transitions. [2021-06-05 04:45:24,861 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:24,861 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 1612 transitions. [2021-06-05 04:45:24,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:45:24,862 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:24,862 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:25,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:25,077 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:25,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:25,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1924792344, now seen corresponding path program 26 times [2021-06-05 04:45:25,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:25,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382532541] [2021-06-05 04:45:25,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:25,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:25,159 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:25,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:25,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382532541] [2021-06-05 04:45:25,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382532541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:25,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158343327] [2021-06-05 04:45:25,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:25,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:45:25,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:25,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:45:25,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:25,341 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:25,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158343327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:25,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:25,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 04:45:25,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023916560] [2021-06-05 04:45:25,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:45:25,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:25,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:45:25,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:45:25,342 INFO L87 Difference]: Start difference. First operand 514 states and 1612 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:25,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:25,615 INFO L93 Difference]: Finished difference Result 772 states and 2308 transitions. [2021-06-05 04:45:25,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:45:25,615 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:45:25,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:25,617 INFO L225 Difference]: With dead ends: 772 [2021-06-05 04:45:25,617 INFO L226 Difference]: Without dead ends: 703 [2021-06-05 04:45:25,617 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 226.4ms TimeCoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:45:25,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2021-06-05 04:45:25,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 501. [2021-06-05 04:45:25,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 500 states have (on average 3.092) internal successors, (1546), 500 states have internal predecessors, (1546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:25,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 1546 transitions. [2021-06-05 04:45:25,624 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 1546 transitions. Word has length 21 [2021-06-05 04:45:25,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:25,624 INFO L482 AbstractCegarLoop]: Abstraction has 501 states and 1546 transitions. [2021-06-05 04:45:25,624 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:25,624 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 1546 transitions. [2021-06-05 04:45:25,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:45:25,625 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:25,625 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:25,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable416 [2021-06-05 04:45:25,827 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:25,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:25,827 INFO L82 PathProgramCache]: Analyzing trace with hash 941515172, now seen corresponding path program 27 times [2021-06-05 04:45:25,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:25,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043552355] [2021-06-05 04:45:25,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:25,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:25,914 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:25,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:25,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043552355] [2021-06-05 04:45:25,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043552355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:25,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887021757] [2021-06-05 04:45:25,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:25,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:45:25,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:25,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:45:25,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:26,081 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:26,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887021757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:26,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:26,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 04:45:26,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940774553] [2021-06-05 04:45:26,083 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:45:26,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:26,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:45:26,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:45:26,084 INFO L87 Difference]: Start difference. First operand 501 states and 1546 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:26,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:26,283 INFO L93 Difference]: Finished difference Result 688 states and 2059 transitions. [2021-06-05 04:45:26,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:45:26,284 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:45:26,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:26,285 INFO L225 Difference]: With dead ends: 688 [2021-06-05 04:45:26,285 INFO L226 Difference]: Without dead ends: 636 [2021-06-05 04:45:26,285 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 198.1ms TimeCoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:45:26,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2021-06-05 04:45:26,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 481. [2021-06-05 04:45:26,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 480 states have (on average 3.0625) internal successors, (1470), 480 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:26,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 1470 transitions. [2021-06-05 04:45:26,294 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 1470 transitions. Word has length 21 [2021-06-05 04:45:26,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:26,294 INFO L482 AbstractCegarLoop]: Abstraction has 481 states and 1470 transitions. [2021-06-05 04:45:26,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:26,295 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 1470 transitions. [2021-06-05 04:45:26,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:45:26,296 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:26,296 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:26,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable424,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:26,509 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:26,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:26,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1149829974, now seen corresponding path program 28 times [2021-06-05 04:45:26,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:26,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187095722] [2021-06-05 04:45:26,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:26,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:26,672 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:26,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:26,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187095722] [2021-06-05 04:45:26,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187095722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:26,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163721477] [2021-06-05 04:45:26,672 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:26,726 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:45:26,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:26,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:45:26,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:26,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:45:26,781 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:26,795 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:26,797 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-05 04:45:26,797 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:24 [2021-06-05 04:45:26,955 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:45:26,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163721477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:26,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:26,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2021-06-05 04:45:26,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208666404] [2021-06-05 04:45:26,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:45:26,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:26,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:45:26,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:45:26,956 INFO L87 Difference]: Start difference. First operand 481 states and 1470 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:27,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:27,765 INFO L93 Difference]: Finished difference Result 800 states and 2393 transitions. [2021-06-05 04:45:27,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:45:27,765 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:45:27,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:27,766 INFO L225 Difference]: With dead ends: 800 [2021-06-05 04:45:27,766 INFO L226 Difference]: Without dead ends: 713 [2021-06-05 04:45:27,767 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 771.6ms TimeCoverageRelationStatistics Valid=193, Invalid=863, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:45:27,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2021-06-05 04:45:27,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 466. [2021-06-05 04:45:27,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 465 states have (on average 3.0602150537634407) internal successors, (1423), 465 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:27,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 1423 transitions. [2021-06-05 04:45:27,773 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 1423 transitions. Word has length 21 [2021-06-05 04:45:27,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:27,773 INFO L482 AbstractCegarLoop]: Abstraction has 466 states and 1423 transitions. [2021-06-05 04:45:27,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:27,773 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 1423 transitions. [2021-06-05 04:45:27,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:45:27,774 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:27,774 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:27,974 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable427 [2021-06-05 04:45:27,974 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:27,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:27,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1969646678, now seen corresponding path program 29 times [2021-06-05 04:45:27,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:27,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796299067] [2021-06-05 04:45:27,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:27,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:28,063 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:28,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:28,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796299067] [2021-06-05 04:45:28,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796299067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:28,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953038984] [2021-06-05 04:45:28,064 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:28,104 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:45:28,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:28,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:45:28,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:28,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:45:28,176 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:28,187 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:28,189 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-05 04:45:28,189 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:20 [2021-06-05 04:45:28,391 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:45:28,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953038984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:28,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:28,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-06-05 04:45:28,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969655244] [2021-06-05 04:45:28,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:45:28,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:28,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:45:28,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:45:28,392 INFO L87 Difference]: Start difference. First operand 466 states and 1423 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:28,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:28,602 INFO L93 Difference]: Finished difference Result 732 states and 2198 transitions. [2021-06-05 04:45:28,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:45:28,602 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:45:28,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:28,603 INFO L225 Difference]: With dead ends: 732 [2021-06-05 04:45:28,604 INFO L226 Difference]: Without dead ends: 680 [2021-06-05 04:45:28,604 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 227.6ms TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:45:28,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2021-06-05 04:45:28,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 480. [2021-06-05 04:45:28,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 479 states have (on average 3.1022964509394573) internal successors, (1486), 479 states have internal predecessors, (1486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:28,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 1486 transitions. [2021-06-05 04:45:28,613 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 1486 transitions. Word has length 21 [2021-06-05 04:45:28,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:28,613 INFO L482 AbstractCegarLoop]: Abstraction has 480 states and 1486 transitions. [2021-06-05 04:45:28,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:28,613 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 1486 transitions. [2021-06-05 04:45:28,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:45:28,615 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:28,615 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:28,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable440,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:28,829 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:28,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:28,829 INFO L82 PathProgramCache]: Analyzing trace with hash -356079944, now seen corresponding path program 30 times [2021-06-05 04:45:28,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:28,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174265948] [2021-06-05 04:45:28,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:28,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:28,920 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:28,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:28,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174265948] [2021-06-05 04:45:28,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174265948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:28,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498559287] [2021-06-05 04:45:28,920 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:28,979 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:45:28,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:28,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:45:28,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:29,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:45:29,015 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:29,057 INFO L628 ElimStorePlain]: treesize reduction 2, result has 90.0 percent of original size [2021-06-05 04:45:29,058 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:45:29,058 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:18 [2021-06-05 04:45:29,210 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:45:29,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498559287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:29,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:29,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 04:45:29,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597104726] [2021-06-05 04:45:29,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:45:29,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:29,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:45:29,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:45:29,212 INFO L87 Difference]: Start difference. First operand 480 states and 1486 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:29,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:29,328 INFO L93 Difference]: Finished difference Result 663 states and 1991 transitions. [2021-06-05 04:45:29,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:45:29,328 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:45:29,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:29,329 INFO L225 Difference]: With dead ends: 663 [2021-06-05 04:45:29,330 INFO L226 Difference]: Without dead ends: 606 [2021-06-05 04:45:29,330 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 178.7ms TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:45:29,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2021-06-05 04:45:29,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 446. [2021-06-05 04:45:29,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 445 states have (on average 3.0584269662921346) internal successors, (1361), 445 states have internal predecessors, (1361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:29,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 1361 transitions. [2021-06-05 04:45:29,336 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 1361 transitions. Word has length 21 [2021-06-05 04:45:29,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:29,337 INFO L482 AbstractCegarLoop]: Abstraction has 446 states and 1361 transitions. [2021-06-05 04:45:29,337 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:29,337 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 1361 transitions. [2021-06-05 04:45:29,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:45:29,338 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:29,338 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:29,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable469 [2021-06-05 04:45:29,553 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:29,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:29,553 INFO L82 PathProgramCache]: Analyzing trace with hash 110824918, now seen corresponding path program 31 times [2021-06-05 04:45:29,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:29,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35864660] [2021-06-05 04:45:29,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:29,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:29,622 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:29,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:29,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35864660] [2021-06-05 04:45:29,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35864660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:29,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125420221] [2021-06-05 04:45:29,622 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:29,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:29,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:45:29,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:29,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:45:29,731 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:29,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:45:29,735 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:29,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:45:29,738 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:29,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:45:29,743 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:29,786 INFO L628 ElimStorePlain]: treesize reduction 40, result has 56.5 percent of original size [2021-06-05 04:45:29,786 INFO L518 ElimStorePlain]: Eliminatee ends_with_10 vanished before elimination [2021-06-05 04:45:29,787 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:45:29,787 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:107, output treesize:52 [2021-06-05 04:45:29,912 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:45:29,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125420221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:29,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:29,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 04:45:29,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647889784] [2021-06-05 04:45:29,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:45:29,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:29,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:45:29,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:45:29,913 INFO L87 Difference]: Start difference. First operand 446 states and 1361 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:30,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:30,104 INFO L93 Difference]: Finished difference Result 613 states and 1807 transitions. [2021-06-05 04:45:30,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:45:30,104 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:45:30,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:30,105 INFO L225 Difference]: With dead ends: 613 [2021-06-05 04:45:30,105 INFO L226 Difference]: Without dead ends: 561 [2021-06-05 04:45:30,105 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 242.8ms TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:45:30,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-06-05 04:45:30,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 431. [2021-06-05 04:45:30,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 3.041860465116279) internal successors, (1308), 430 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:30,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 1308 transitions. [2021-06-05 04:45:30,114 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 1308 transitions. Word has length 21 [2021-06-05 04:45:30,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:30,114 INFO L482 AbstractCegarLoop]: Abstraction has 431 states and 1308 transitions. [2021-06-05 04:45:30,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:30,114 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 1308 transitions. [2021-06-05 04:45:30,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:45:30,115 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:30,115 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:30,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable491 [2021-06-05 04:45:30,337 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:30,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:30,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1724391652, now seen corresponding path program 32 times [2021-06-05 04:45:30,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:30,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551208727] [2021-06-05 04:45:30,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:30,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:30,528 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:30,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:30,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551208727] [2021-06-05 04:45:30,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551208727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:30,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449338955] [2021-06-05 04:45:30,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:30,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:45:30,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:30,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:45:30,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:30,775 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:45:30,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449338955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:30,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:30,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2021-06-05 04:45:30,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592869431] [2021-06-05 04:45:30,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:45:30,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:30,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:45:30,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:45:30,776 INFO L87 Difference]: Start difference. First operand 431 states and 1308 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:31,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:31,774 INFO L93 Difference]: Finished difference Result 819 states and 2339 transitions. [2021-06-05 04:45:31,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:45:31,775 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:45:31,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:31,776 INFO L225 Difference]: With dead ends: 819 [2021-06-05 04:45:31,776 INFO L226 Difference]: Without dead ends: 715 [2021-06-05 04:45:31,777 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 998.4ms TimeCoverageRelationStatistics Valid=178, Invalid=814, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:45:31,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2021-06-05 04:45:31,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 427. [2021-06-05 04:45:31,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 426 states have (on average 3.0) internal successors, (1278), 426 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:31,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 1278 transitions. [2021-06-05 04:45:31,786 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 1278 transitions. Word has length 21 [2021-06-05 04:45:31,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:31,786 INFO L482 AbstractCegarLoop]: Abstraction has 427 states and 1278 transitions. [2021-06-05 04:45:31,786 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:31,786 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 1278 transitions. [2021-06-05 04:45:31,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:45:31,787 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:31,787 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:32,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable508,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:32,001 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:32,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:32,001 INFO L82 PathProgramCache]: Analyzing trace with hash -214051430, now seen corresponding path program 33 times [2021-06-05 04:45:32,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:32,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235506112] [2021-06-05 04:45:32,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:32,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:32,068 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:32,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:32,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235506112] [2021-06-05 04:45:32,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235506112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:32,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456014733] [2021-06-05 04:45:32,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:32,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:45:32,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:32,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:45:32,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:32,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:45:32,162 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:32,224 INFO L628 ElimStorePlain]: treesize reduction 28, result has 73.1 percent of original size [2021-06-05 04:45:32,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:45:32,229 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:32,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:45:32,233 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:32,263 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:32,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:45:32,266 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:32,306 INFO L628 ElimStorePlain]: treesize reduction 16, result has 75.4 percent of original size [2021-06-05 04:45:32,307 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:45:32,307 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:107, output treesize:49 [2021-06-05 04:45:32,421 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:32,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456014733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:32,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:32,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 04:45:32,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341337573] [2021-06-05 04:45:32,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:45:32,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:32,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:45:32,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:45:32,422 INFO L87 Difference]: Start difference. First operand 427 states and 1278 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:32,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:32,782 INFO L93 Difference]: Finished difference Result 542 states and 1584 transitions. [2021-06-05 04:45:32,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:45:32,782 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:45:32,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:32,783 INFO L225 Difference]: With dead ends: 542 [2021-06-05 04:45:32,783 INFO L226 Difference]: Without dead ends: 465 [2021-06-05 04:45:32,784 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 344.8ms TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:45:32,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-06-05 04:45:32,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 385. [2021-06-05 04:45:32,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 3.0) internal successors, (1152), 384 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:32,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 1152 transitions. [2021-06-05 04:45:32,790 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 1152 transitions. Word has length 21 [2021-06-05 04:45:32,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:32,790 INFO L482 AbstractCegarLoop]: Abstraction has 385 states and 1152 transitions. [2021-06-05 04:45:32,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:32,791 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 1152 transitions. [2021-06-05 04:45:32,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:45:32,791 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:32,791 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:33,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable531 [2021-06-05 04:45:33,015 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:33,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:33,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1805824578, now seen corresponding path program 34 times [2021-06-05 04:45:33,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:33,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481865240] [2021-06-05 04:45:33,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:33,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:33,127 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:45:33,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:33,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481865240] [2021-06-05 04:45:33,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481865240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:33,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793886412] [2021-06-05 04:45:33,127 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:33,181 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:45:33,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:33,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:45:33,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:33,364 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:33,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793886412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:33,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:33,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 04:45:33,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034118279] [2021-06-05 04:45:33,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:45:33,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:33,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:45:33,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:45:33,367 INFO L87 Difference]: Start difference. First operand 385 states and 1152 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:34,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:34,480 INFO L93 Difference]: Finished difference Result 1027 states and 2935 transitions. [2021-06-05 04:45:34,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 04:45:34,481 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:45:34,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:34,482 INFO L225 Difference]: With dead ends: 1027 [2021-06-05 04:45:34,482 INFO L226 Difference]: Without dead ends: 876 [2021-06-05 04:45:34,483 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 972.8ms TimeCoverageRelationStatistics Valid=291, Invalid=1191, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 04:45:34,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 876 states. [2021-06-05 04:45:34,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 876 to 395. [2021-06-05 04:45:34,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 3.0076142131979697) internal successors, (1185), 394 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:34,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 1185 transitions. [2021-06-05 04:45:34,492 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 1185 transitions. Word has length 21 [2021-06-05 04:45:34,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:34,492 INFO L482 AbstractCegarLoop]: Abstraction has 395 states and 1185 transitions. [2021-06-05 04:45:34,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:34,493 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 1185 transitions. [2021-06-05 04:45:34,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:45:34,493 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:34,493 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:34,715 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable548,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:34,716 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:34,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:34,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1761625290, now seen corresponding path program 35 times [2021-06-05 04:45:34,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:34,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348831619] [2021-06-05 04:45:34,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:34,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:34,831 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:34,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:34,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348831619] [2021-06-05 04:45:34,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348831619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:34,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535093968] [2021-06-05 04:45:34,831 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:34,890 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:45:34,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:34,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:45:34,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:34,992 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:34,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535093968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:34,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:34,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-05 04:45:34,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564048076] [2021-06-05 04:45:34,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:45:34,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:34,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:45:34,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:45:34,993 INFO L87 Difference]: Start difference. First operand 395 states and 1185 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:35,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:35,348 INFO L93 Difference]: Finished difference Result 561 states and 1670 transitions. [2021-06-05 04:45:35,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:45:35,349 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:45:35,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:35,350 INFO L225 Difference]: With dead ends: 561 [2021-06-05 04:45:35,350 INFO L226 Difference]: Without dead ends: 509 [2021-06-05 04:45:35,350 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 310.4ms TimeCoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:45:35,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-06-05 04:45:35,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 404. [2021-06-05 04:45:35,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 3.0124069478908186) internal successors, (1214), 403 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:35,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 1214 transitions. [2021-06-05 04:45:35,358 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 1214 transitions. Word has length 21 [2021-06-05 04:45:35,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:35,358 INFO L482 AbstractCegarLoop]: Abstraction has 404 states and 1214 transitions. [2021-06-05 04:45:35,358 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:35,358 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 1214 transitions. [2021-06-05 04:45:35,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:45:35,359 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:35,359 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:35,571 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable557 [2021-06-05 04:45:35,572 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:35,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:35,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1539064924, now seen corresponding path program 36 times [2021-06-05 04:45:35,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:35,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14331299] [2021-06-05 04:45:35,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:35,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:35,674 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:35,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:35,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14331299] [2021-06-05 04:45:35,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14331299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:35,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257155926] [2021-06-05 04:45:35,674 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:35,715 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:45:35,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:35,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:45:35,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:35,846 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:35,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257155926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:35,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:35,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-05 04:45:35,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157299546] [2021-06-05 04:45:35,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:45:35,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:35,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:45:35,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:45:35,847 INFO L87 Difference]: Start difference. First operand 404 states and 1214 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:36,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:36,125 INFO L93 Difference]: Finished difference Result 648 states and 1890 transitions. [2021-06-05 04:45:36,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:45:36,126 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:45:36,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:36,127 INFO L225 Difference]: With dead ends: 648 [2021-06-05 04:45:36,127 INFO L226 Difference]: Without dead ends: 579 [2021-06-05 04:45:36,127 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 246.6ms TimeCoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:45:36,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-06-05 04:45:36,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 433. [2021-06-05 04:45:36,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 432 states have (on average 3.0300925925925926) internal successors, (1309), 432 states have internal predecessors, (1309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:36,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 1309 transitions. [2021-06-05 04:45:36,133 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 1309 transitions. Word has length 21 [2021-06-05 04:45:36,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:36,133 INFO L482 AbstractCegarLoop]: Abstraction has 433 states and 1309 transitions. [2021-06-05 04:45:36,133 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:36,133 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 1309 transitions. [2021-06-05 04:45:36,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:45:36,134 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:36,134 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:36,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable560,38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:36,349 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:36,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:36,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1609295264, now seen corresponding path program 37 times [2021-06-05 04:45:36,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:36,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916832864] [2021-06-05 04:45:36,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:36,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:36,472 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:36,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:36,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916832864] [2021-06-05 04:45:36,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916832864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:36,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599337425] [2021-06-05 04:45:36,473 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:36,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:36,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:45:36,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:36,658 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:36,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599337425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:36,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:36,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-06-05 04:45:36,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8317591] [2021-06-05 04:45:36,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:45:36,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:36,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:45:36,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:45:36,659 INFO L87 Difference]: Start difference. First operand 433 states and 1309 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:36,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:36,951 INFO L93 Difference]: Finished difference Result 583 states and 1717 transitions. [2021-06-05 04:45:36,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:45:36,952 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:45:36,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:36,953 INFO L225 Difference]: With dead ends: 583 [2021-06-05 04:45:36,953 INFO L226 Difference]: Without dead ends: 531 [2021-06-05 04:45:36,953 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 271.5ms TimeCoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:45:36,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-06-05 04:45:36,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 395. [2021-06-05 04:45:36,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 3.0076142131979697) internal successors, (1185), 394 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:36,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 1185 transitions. [2021-06-05 04:45:36,960 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 1185 transitions. Word has length 21 [2021-06-05 04:45:36,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:36,960 INFO L482 AbstractCegarLoop]: Abstraction has 395 states and 1185 transitions. [2021-06-05 04:45:36,961 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:36,961 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 1185 transitions. [2021-06-05 04:45:36,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:45:36,961 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:36,961 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:37,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable568 [2021-06-05 04:45:37,177 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:37,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:37,177 INFO L82 PathProgramCache]: Analyzing trace with hash 927641802, now seen corresponding path program 38 times [2021-06-05 04:45:37,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:37,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902493723] [2021-06-05 04:45:37,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:37,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:37,266 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:45:37,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:37,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902493723] [2021-06-05 04:45:37,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902493723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:37,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321683194] [2021-06-05 04:45:37,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:37,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:45:37,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:37,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:45:37,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:37,515 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:45:37,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321683194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:37,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:37,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 04:45:37,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910777506] [2021-06-05 04:45:37,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:45:37,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:37,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:45:37,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:45:37,516 INFO L87 Difference]: Start difference. First operand 395 states and 1185 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:38,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:38,196 INFO L93 Difference]: Finished difference Result 659 states and 1867 transitions. [2021-06-05 04:45:38,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 04:45:38,197 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:45:38,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:38,198 INFO L225 Difference]: With dead ends: 659 [2021-06-05 04:45:38,198 INFO L226 Difference]: Without dead ends: 508 [2021-06-05 04:45:38,198 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 581.4ms TimeCoverageRelationStatistics Valid=157, Invalid=835, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:45:38,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-06-05 04:45:38,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 388. [2021-06-05 04:45:38,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 2.992248062015504) internal successors, (1158), 387 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:38,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 1158 transitions. [2021-06-05 04:45:38,205 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 1158 transitions. Word has length 21 [2021-06-05 04:45:38,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:38,206 INFO L482 AbstractCegarLoop]: Abstraction has 388 states and 1158 transitions. [2021-06-05 04:45:38,206 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:38,206 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 1158 transitions. [2021-06-05 04:45:38,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:45:38,207 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:38,207 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:38,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable576 [2021-06-05 04:45:38,429 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:38,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:38,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1063950666, now seen corresponding path program 39 times [2021-06-05 04:45:38,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:38,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441077838] [2021-06-05 04:45:38,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:38,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:38,528 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:45:38,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:38,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441077838] [2021-06-05 04:45:38,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441077838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:38,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510802422] [2021-06-05 04:45:38,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:38,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:45:38,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:38,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:45:38,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:38,752 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:38,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510802422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:38,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:38,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 04:45:38,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883197229] [2021-06-05 04:45:38,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:45:38,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:38,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:45:38,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:45:38,754 INFO L87 Difference]: Start difference. First operand 388 states and 1158 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:39,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:39,862 INFO L93 Difference]: Finished difference Result 733 states and 2120 transitions. [2021-06-05 04:45:39,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 04:45:39,862 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:45:39,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:39,863 INFO L225 Difference]: With dead ends: 733 [2021-06-05 04:45:39,863 INFO L226 Difference]: Without dead ends: 590 [2021-06-05 04:45:39,863 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 919.9ms TimeCoverageRelationStatistics Valid=296, Invalid=1264, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 04:45:39,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2021-06-05 04:45:39,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 370. [2021-06-05 04:45:39,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 2.97289972899729) internal successors, (1097), 369 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:39,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 1097 transitions. [2021-06-05 04:45:39,868 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 1097 transitions. Word has length 21 [2021-06-05 04:45:39,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:39,868 INFO L482 AbstractCegarLoop]: Abstraction has 370 states and 1097 transitions. [2021-06-05 04:45:39,868 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:39,868 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 1097 transitions. [2021-06-05 04:45:39,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:45:39,869 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:39,869 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:40,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable583,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:40,069 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:40,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:40,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1824010934, now seen corresponding path program 40 times [2021-06-05 04:45:40,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:40,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134143163] [2021-06-05 04:45:40,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:40,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:40,170 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:45:40,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:40,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134143163] [2021-06-05 04:45:40,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134143163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:40,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891551697] [2021-06-05 04:45:40,170 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:40,225 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:45:40,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:40,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:45:40,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:40,362 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:40,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891551697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:40,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:40,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 04:45:40,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525326191] [2021-06-05 04:45:40,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:45:40,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:40,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:45:40,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:45:40,363 INFO L87 Difference]: Start difference. First operand 370 states and 1097 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:41,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:41,359 INFO L93 Difference]: Finished difference Result 858 states and 2494 transitions. [2021-06-05 04:45:41,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 04:45:41,359 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:45:41,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:41,360 INFO L225 Difference]: With dead ends: 858 [2021-06-05 04:45:41,360 INFO L226 Difference]: Without dead ends: 761 [2021-06-05 04:45:41,361 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 750.1ms TimeCoverageRelationStatistics Valid=313, Invalid=1247, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 04:45:41,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2021-06-05 04:45:41,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 390. [2021-06-05 04:45:41,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 3.025706940874036) internal successors, (1177), 389 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:41,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1177 transitions. [2021-06-05 04:45:41,366 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1177 transitions. Word has length 21 [2021-06-05 04:45:41,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:41,367 INFO L482 AbstractCegarLoop]: Abstraction has 390 states and 1177 transitions. [2021-06-05 04:45:41,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:41,367 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1177 transitions. [2021-06-05 04:45:41,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:45:41,367 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:41,367 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:41,567 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable591,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:41,568 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:41,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:41,568 INFO L82 PathProgramCache]: Analyzing trace with hash -223501882, now seen corresponding path program 41 times [2021-06-05 04:45:41,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:41,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514581185] [2021-06-05 04:45:41,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:41,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:41,644 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:45:41,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:41,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514581185] [2021-06-05 04:45:41,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514581185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:41,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300834959] [2021-06-05 04:45:41,645 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:41,705 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:45:41,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:41,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:45:41,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:41,806 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:41,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300834959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:41,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:41,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 04:45:41,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085322322] [2021-06-05 04:45:41,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:45:41,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:41,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:45:41,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:45:41,807 INFO L87 Difference]: Start difference. First operand 390 states and 1177 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:42,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:42,721 INFO L93 Difference]: Finished difference Result 851 states and 2515 transitions. [2021-06-05 04:45:42,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 04:45:42,721 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:45:42,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:42,722 INFO L225 Difference]: With dead ends: 851 [2021-06-05 04:45:42,722 INFO L226 Difference]: Without dead ends: 742 [2021-06-05 04:45:42,722 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 670.8ms TimeCoverageRelationStatistics Valid=273, Invalid=1133, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 04:45:42,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2021-06-05 04:45:42,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 400. [2021-06-05 04:45:42,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 3.0526315789473686) internal successors, (1218), 399 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:42,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 1218 transitions. [2021-06-05 04:45:42,728 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 1218 transitions. Word has length 21 [2021-06-05 04:45:42,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:42,728 INFO L482 AbstractCegarLoop]: Abstraction has 400 states and 1218 transitions. [2021-06-05 04:45:42,728 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:42,728 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 1218 transitions. [2021-06-05 04:45:42,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:45:42,729 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:42,729 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:42,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable598 [2021-06-05 04:45:42,930 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:42,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:42,930 INFO L82 PathProgramCache]: Analyzing trace with hash 59224522, now seen corresponding path program 42 times [2021-06-05 04:45:42,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:42,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039209649] [2021-06-05 04:45:42,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:42,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:43,004 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:45:43,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:43,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039209649] [2021-06-05 04:45:43,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039209649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:43,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862682006] [2021-06-05 04:45:43,005 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:43,046 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:45:43,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:43,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:45:43,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:43,150 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:43,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862682006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:43,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:43,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 04:45:43,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416255733] [2021-06-05 04:45:43,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:45:43,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:43,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:45:43,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:45:43,151 INFO L87 Difference]: Start difference. First operand 400 states and 1218 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:43,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:43,844 INFO L93 Difference]: Finished difference Result 777 states and 2233 transitions. [2021-06-05 04:45:43,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:45:43,844 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:45:43,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:43,845 INFO L225 Difference]: With dead ends: 777 [2021-06-05 04:45:43,845 INFO L226 Difference]: Without dead ends: 676 [2021-06-05 04:45:43,845 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 540.7ms TimeCoverageRelationStatistics Valid=199, Invalid=857, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:45:43,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2021-06-05 04:45:43,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 385. [2021-06-05 04:45:43,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 2.9817708333333335) internal successors, (1145), 384 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:43,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 1145 transitions. [2021-06-05 04:45:43,852 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 1145 transitions. Word has length 21 [2021-06-05 04:45:43,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:43,852 INFO L482 AbstractCegarLoop]: Abstraction has 385 states and 1145 transitions. [2021-06-05 04:45:43,853 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:43,853 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 1145 transitions. [2021-06-05 04:45:43,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:45:43,853 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:43,854 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:44,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable601,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:44,069 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:44,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:44,069 INFO L82 PathProgramCache]: Analyzing trace with hash -191892094, now seen corresponding path program 43 times [2021-06-05 04:45:44,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:44,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37649426] [2021-06-05 04:45:44,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:44,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:44,135 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:45:44,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:44,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37649426] [2021-06-05 04:45:44,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37649426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:44,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76744249] [2021-06-05 04:45:44,135 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:44,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:44,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:45:44,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:44,283 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:45:44,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76744249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:44,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:44,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 04:45:44,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387955491] [2021-06-05 04:45:44,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:45:44,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:44,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:45:44,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:45:44,286 INFO L87 Difference]: Start difference. First operand 385 states and 1145 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:44,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:44,912 INFO L93 Difference]: Finished difference Result 528 states and 1542 transitions. [2021-06-05 04:45:44,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 04:45:44,912 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:45:44,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:44,913 INFO L225 Difference]: With dead ends: 528 [2021-06-05 04:45:44,913 INFO L226 Difference]: Without dead ends: 482 [2021-06-05 04:45:44,913 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 497.2ms TimeCoverageRelationStatistics Valid=208, Invalid=848, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:45:44,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-06-05 04:45:44,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 304. [2021-06-05 04:45:44,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.953795379537954) internal successors, (895), 303 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:44,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 895 transitions. [2021-06-05 04:45:44,918 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 895 transitions. Word has length 21 [2021-06-05 04:45:44,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:44,918 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 895 transitions. [2021-06-05 04:45:44,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:44,918 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 895 transitions. [2021-06-05 04:45:44,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:45:44,919 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:44,919 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:45,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable608,45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:45,119 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:45,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:45,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1148844402, now seen corresponding path program 44 times [2021-06-05 04:45:45,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:45,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624952129] [2021-06-05 04:45:45,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:45,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:45,206 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:45:45,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:45,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624952129] [2021-06-05 04:45:45,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624952129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:45,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156398714] [2021-06-05 04:45:45,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:45,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:45:45,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:45,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:45:45,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:45,500 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:45,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156398714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:45,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:45,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 04:45:45,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110588321] [2021-06-05 04:45:45,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:45:45,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:45,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:45:45,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:45:45,501 INFO L87 Difference]: Start difference. First operand 304 states and 895 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:46,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:46,164 INFO L93 Difference]: Finished difference Result 791 states and 2249 transitions. [2021-06-05 04:45:46,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:45:46,164 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:45:46,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:46,165 INFO L225 Difference]: With dead ends: 791 [2021-06-05 04:45:46,165 INFO L226 Difference]: Without dead ends: 673 [2021-06-05 04:45:46,165 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 724.7ms TimeCoverageRelationStatistics Valid=193, Invalid=509, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:45:46,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2021-06-05 04:45:46,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 311. [2021-06-05 04:45:46,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 2.97741935483871) internal successors, (923), 310 states have internal predecessors, (923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:46,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 923 transitions. [2021-06-05 04:45:46,170 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 923 transitions. Word has length 22 [2021-06-05 04:45:46,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:46,171 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 923 transitions. [2021-06-05 04:45:46,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:46,171 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 923 transitions. [2021-06-05 04:45:46,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:45:46,171 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:46,171 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:46,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable611 [2021-06-05 04:45:46,372 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:46,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:46,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1439910460, now seen corresponding path program 45 times [2021-06-05 04:45:46,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:46,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873885727] [2021-06-05 04:45:46,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:46,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:46,456 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:45:46,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:46,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873885727] [2021-06-05 04:45:46,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873885727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:46,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412661153] [2021-06-05 04:45:46,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:46,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:45:46,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:46,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:45:46,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:46,700 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:45:46,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412661153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:46,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:46,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 04:45:46,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851101424] [2021-06-05 04:45:46,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:45:46,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:46,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:45:46,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:45:46,700 INFO L87 Difference]: Start difference. First operand 311 states and 923 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:46,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:46,936 INFO L93 Difference]: Finished difference Result 694 states and 1967 transitions. [2021-06-05 04:45:46,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:45:46,936 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:45:46,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:46,937 INFO L225 Difference]: With dead ends: 694 [2021-06-05 04:45:46,937 INFO L226 Difference]: Without dead ends: 607 [2021-06-05 04:45:46,937 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 310.2ms TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:45:46,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-06-05 04:45:46,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 302. [2021-06-05 04:45:46,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 2.956810631229236) internal successors, (890), 301 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:46,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 890 transitions. [2021-06-05 04:45:46,944 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 890 transitions. Word has length 22 [2021-06-05 04:45:46,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:46,944 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 890 transitions. [2021-06-05 04:45:46,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:46,944 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 890 transitions. [2021-06-05 04:45:46,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:45:46,945 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:46,945 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:47,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable619,47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:47,157 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:47,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:47,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1043150932, now seen corresponding path program 46 times [2021-06-05 04:45:47,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:47,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427826683] [2021-06-05 04:45:47,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:47,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:47,227 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:47,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:47,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427826683] [2021-06-05 04:45:47,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427826683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:47,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639247794] [2021-06-05 04:45:47,228 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:47,274 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:45:47,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:47,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:45:47,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:47,467 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:47,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639247794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:47,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:47,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 04:45:47,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782959845] [2021-06-05 04:45:47,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:45:47,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:47,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:45:47,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:45:47,469 INFO L87 Difference]: Start difference. First operand 302 states and 890 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:48,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:48,230 INFO L93 Difference]: Finished difference Result 620 states and 1775 transitions. [2021-06-05 04:45:48,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:45:48,230 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:45:48,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:48,231 INFO L225 Difference]: With dead ends: 620 [2021-06-05 04:45:48,231 INFO L226 Difference]: Without dead ends: 510 [2021-06-05 04:45:48,231 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 791.5ms TimeCoverageRelationStatistics Valid=184, Invalid=628, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:45:48,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-06-05 04:45:48,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 269. [2021-06-05 04:45:48,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 2.966417910447761) internal successors, (795), 268 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:48,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 795 transitions. [2021-06-05 04:45:48,239 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 795 transitions. Word has length 22 [2021-06-05 04:45:48,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:48,239 INFO L482 AbstractCegarLoop]: Abstraction has 269 states and 795 transitions. [2021-06-05 04:45:48,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:48,239 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 795 transitions. [2021-06-05 04:45:48,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:45:48,240 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:48,240 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:48,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable630,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:48,454 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:48,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:48,454 INFO L82 PathProgramCache]: Analyzing trace with hash 942011964, now seen corresponding path program 47 times [2021-06-05 04:45:48,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:48,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880987439] [2021-06-05 04:45:48,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:48,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:48,562 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:45:48,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:48,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880987439] [2021-06-05 04:45:48,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880987439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:48,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880015612] [2021-06-05 04:45:48,563 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:48,608 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:45:48,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:48,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:45:48,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:48,811 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:48,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880015612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:48,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:48,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-06-05 04:45:48,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918767226] [2021-06-05 04:45:48,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:45:48,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:48,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:45:48,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:45:48,813 INFO L87 Difference]: Start difference. First operand 269 states and 795 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:50,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:50,148 INFO L93 Difference]: Finished difference Result 887 states and 2504 transitions. [2021-06-05 04:45:50,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:45:50,148 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:45:50,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:50,149 INFO L225 Difference]: With dead ends: 887 [2021-06-05 04:45:50,149 INFO L226 Difference]: Without dead ends: 635 [2021-06-05 04:45:50,149 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 1328.6ms TimeCoverageRelationStatistics Valid=353, Invalid=1207, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 04:45:50,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-06-05 04:45:50,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 269. [2021-06-05 04:45:50,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 2.9365671641791047) internal successors, (787), 268 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:50,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 787 transitions. [2021-06-05 04:45:50,154 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 787 transitions. Word has length 22 [2021-06-05 04:45:50,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:50,154 INFO L482 AbstractCegarLoop]: Abstraction has 269 states and 787 transitions. [2021-06-05 04:45:50,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:50,154 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 787 transitions. [2021-06-05 04:45:50,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:45:50,154 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:50,155 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:50,355 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable636,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:50,355 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:50,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:50,355 INFO L82 PathProgramCache]: Analyzing trace with hash 746481008, now seen corresponding path program 48 times [2021-06-05 04:45:50,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:50,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262227469] [2021-06-05 04:45:50,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:50,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:50,493 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:50,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:50,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262227469] [2021-06-05 04:45:50,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262227469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:50,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174326535] [2021-06-05 04:45:50,494 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:50,568 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:45:50,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:50,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:45:50,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:50,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:45:50,730 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:50,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:50,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:45:50,736 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:50,886 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2021-06-05 04:45:50,886 INFO L628 ElimStorePlain]: treesize reduction 36, result has 78.7 percent of original size [2021-06-05 04:45:50,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:45:50,891 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:50,952 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:50,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:45:50,960 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:50,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:45:50,963 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:51,020 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:51,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:45:51,025 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:51,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:45:51,029 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:51,082 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:51,086 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: 6 dim-0 vars, and 6 xjuncts. [2021-06-05 04:45:51,086 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 8 variables, input treesize:199, output treesize:114 [2021-06-05 04:45:51,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:51,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:51,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:45:51,357 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:51,359 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:45:51,360 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:51,396 INFO L628 ElimStorePlain]: treesize reduction 20, result has 61.5 percent of original size [2021-06-05 04:45:51,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:45:51,400 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:51,412 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:51,413 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:45:51,413 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:79, output treesize:13 [2021-06-05 04:45:51,474 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:51,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174326535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:51,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:51,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 04:45:51,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440932762] [2021-06-05 04:45:51,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:45:51,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:51,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:45:51,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:45:51,475 INFO L87 Difference]: Start difference. First operand 269 states and 787 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:52,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:52,198 INFO L93 Difference]: Finished difference Result 639 states and 1819 transitions. [2021-06-05 04:45:52,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:45:52,198 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:45:52,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:52,199 INFO L225 Difference]: With dead ends: 639 [2021-06-05 04:45:52,199 INFO L226 Difference]: Without dead ends: 521 [2021-06-05 04:45:52,199 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 860.7ms TimeCoverageRelationStatistics Valid=200, Invalid=556, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:45:52,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-06-05 04:45:52,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 290. [2021-06-05 04:45:52,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 2.98961937716263) internal successors, (864), 289 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:52,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 864 transitions. [2021-06-05 04:45:52,203 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 864 transitions. Word has length 22 [2021-06-05 04:45:52,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:52,203 INFO L482 AbstractCegarLoop]: Abstraction has 290 states and 864 transitions. [2021-06-05 04:45:52,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:52,203 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 864 transitions. [2021-06-05 04:45:52,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:45:52,204 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:52,204 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:52,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable643 [2021-06-05 04:45:52,404 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:52,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:52,404 INFO L82 PathProgramCache]: Analyzing trace with hash -959731426, now seen corresponding path program 49 times [2021-06-05 04:45:52,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:52,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707183300] [2021-06-05 04:45:52,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:52,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:52,564 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:52,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:52,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707183300] [2021-06-05 04:45:52,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707183300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:52,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528312805] [2021-06-05 04:45:52,565 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:52,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:52,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:45:52,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:52,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:52,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:52,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:45:52,765 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:52,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:45:52,770 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:52,904 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2021-06-05 04:45:52,904 INFO L628 ElimStorePlain]: treesize reduction 36, result has 78.7 percent of original size [2021-06-05 04:45:52,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:45:52,923 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:52,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:45:52,927 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:52,987 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:52,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:45:52,992 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:52,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:45:52,996 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:53,051 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:53,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:45:53,056 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:53,129 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:53,133 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: 6 dim-0 vars, and 6 xjuncts. [2021-06-05 04:45:53,133 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 8 variables, input treesize:199, output treesize:114 [2021-06-05 04:45:53,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:45:53,402 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:53,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:53,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:45:53,408 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:53,494 INFO L628 ElimStorePlain]: treesize reduction 78, result has 46.2 percent of original size [2021-06-05 04:45:53,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:45:53,498 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:53,527 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:53,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:45:53,531 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:53,558 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:53,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:45:53,562 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:53,588 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:53,590 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:45:53,591 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:157, output treesize:25 [2021-06-05 04:45:53,677 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:53,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528312805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:53,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:53,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 04:45:53,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350734365] [2021-06-05 04:45:53,678 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:45:53,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:53,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:45:53,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:45:53,678 INFO L87 Difference]: Start difference. First operand 290 states and 864 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:55,401 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2021-06-05 04:45:55,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:55,665 INFO L93 Difference]: Finished difference Result 703 states and 1960 transitions. [2021-06-05 04:45:55,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:45:55,666 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:45:55,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:55,666 INFO L225 Difference]: With dead ends: 703 [2021-06-05 04:45:55,666 INFO L226 Difference]: Without dead ends: 541 [2021-06-05 04:45:55,667 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 1924.8ms TimeCoverageRelationStatistics Valid=288, Invalid=972, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 04:45:55,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2021-06-05 04:45:55,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 283. [2021-06-05 04:45:55,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 2.9645390070921986) internal successors, (836), 282 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:55,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 836 transitions. [2021-06-05 04:45:55,670 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 836 transitions. Word has length 22 [2021-06-05 04:45:55,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:55,671 INFO L482 AbstractCegarLoop]: Abstraction has 283 states and 836 transitions. [2021-06-05 04:45:55,671 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:55,671 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 836 transitions. [2021-06-05 04:45:55,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:45:55,671 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:55,671 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:55,871 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable675 [2021-06-05 04:45:55,872 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:55,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:55,872 INFO L82 PathProgramCache]: Analyzing trace with hash 205767280, now seen corresponding path program 50 times [2021-06-05 04:45:55,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:55,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742141716] [2021-06-05 04:45:55,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:55,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:56,129 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:56,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:56,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742141716] [2021-06-05 04:45:56,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742141716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:56,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049818660] [2021-06-05 04:45:56,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:56,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:45:56,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:56,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:45:56,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:56,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:45:56,399 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:56,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:56,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:45:56,404 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:56,578 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-06-05 04:45:56,578 INFO L628 ElimStorePlain]: treesize reduction 32, result has 79.7 percent of original size [2021-06-05 04:45:56,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:45:56,584 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:56,648 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:56,652 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 5 xjuncts. [2021-06-05 04:45:56,652 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:170, output treesize:120 [2021-06-05 04:45:56,893 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:56,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049818660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:56,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:56,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-06-05 04:45:56,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402923871] [2021-06-05 04:45:56,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:45:56,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:56,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:45:56,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:45:56,894 INFO L87 Difference]: Start difference. First operand 283 states and 836 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:57,480 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 50 [2021-06-05 04:45:57,843 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 50 [2021-06-05 04:45:58,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:58,122 INFO L93 Difference]: Finished difference Result 463 states and 1318 transitions. [2021-06-05 04:45:58,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:45:58,122 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:45:58,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:58,122 INFO L225 Difference]: With dead ends: 463 [2021-06-05 04:45:58,122 INFO L226 Difference]: Without dead ends: 323 [2021-06-05 04:45:58,123 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 1323.7ms TimeCoverageRelationStatistics Valid=141, Invalid=509, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:45:58,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-06-05 04:45:58,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 276. [2021-06-05 04:45:58,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 2.938181818181818) internal successors, (808), 275 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:58,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 808 transitions. [2021-06-05 04:45:58,127 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 808 transitions. Word has length 22 [2021-06-05 04:45:58,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:58,127 INFO L482 AbstractCegarLoop]: Abstraction has 276 states and 808 transitions. [2021-06-05 04:45:58,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:58,127 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 808 transitions. [2021-06-05 04:45:58,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:45:58,127 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:58,128 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:58,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable712 [2021-06-05 04:45:58,341 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:58,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:58,341 INFO L82 PathProgramCache]: Analyzing trace with hash -388078088, now seen corresponding path program 51 times [2021-06-05 04:45:58,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:58,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723671440] [2021-06-05 04:45:58,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:58,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:58,460 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:58,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:58,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723671440] [2021-06-05 04:45:58,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723671440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:58,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551454453] [2021-06-05 04:45:58,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:58,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:45:58,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:58,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:45:58,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:58,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:58,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:58,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:45:58,670 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:58,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:58,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:58,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:45:58,674 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:58,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:45:58,678 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:58,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:45:58,681 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:58,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:45:58,685 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:58,687 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:45:58,688 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:58,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:58,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:58,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:45:58,702 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:58,704 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:45:58,704 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:58,770 INFO L628 ElimStorePlain]: treesize reduction 23, result has 76.3 percent of original size [2021-06-05 04:45:58,773 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-06-05 04:45:58,773 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 2 variables, input treesize:199, output treesize:66 [2021-06-05 04:45:58,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:45:58,944 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:58,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:58,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:45:58,948 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:58,984 INFO L628 ElimStorePlain]: treesize reduction 35, result has 47.8 percent of original size [2021-06-05 04:45:58,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:45:58,988 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:59,000 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:59,001 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:45:59,001 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:79, output treesize:13 [2021-06-05 04:45:59,045 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:59,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551454453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:59,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:59,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 04:45:59,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672066199] [2021-06-05 04:45:59,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:45:59,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:59,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:45:59,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:45:59,046 INFO L87 Difference]: Start difference. First operand 276 states and 808 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:59,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:59,677 INFO L93 Difference]: Finished difference Result 730 states and 2080 transitions. [2021-06-05 04:45:59,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:45:59,677 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:45:59,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:59,678 INFO L225 Difference]: With dead ends: 730 [2021-06-05 04:45:59,678 INFO L226 Difference]: Without dead ends: 612 [2021-06-05 04:45:59,679 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 637.5ms TimeCoverageRelationStatistics Valid=192, Invalid=510, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:45:59,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-06-05 04:45:59,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 304. [2021-06-05 04:45:59,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 3.036303630363036) internal successors, (920), 303 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:59,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 920 transitions. [2021-06-05 04:45:59,684 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 920 transitions. Word has length 22 [2021-06-05 04:45:59,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:59,684 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 920 transitions. [2021-06-05 04:45:59,684 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:59,685 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 920 transitions. [2021-06-05 04:45:59,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:45:59,685 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:59,685 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:59,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable740 [2021-06-05 04:45:59,897 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:59,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:59,897 INFO L82 PathProgramCache]: Analyzing trace with hash -2094290522, now seen corresponding path program 52 times [2021-06-05 04:45:59,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:59,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542022428] [2021-06-05 04:45:59,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:59,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:00,032 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:00,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:00,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542022428] [2021-06-05 04:46:00,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542022428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:00,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347934615] [2021-06-05 04:46:00,032 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:00,093 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:46:00,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:00,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:46:00,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:00,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:00,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:00,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:46:00,230 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:00,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:46:00,234 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:00,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:46:00,239 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:00,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:00,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:46:00,243 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:00,323 INFO L628 ElimStorePlain]: treesize reduction 19, result has 79.6 percent of original size [2021-06-05 04:46:00,326 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-06-05 04:46:00,326 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:132, output treesize:66 [2021-06-05 04:46:00,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:00,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:00,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:46:00,536 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:00,539 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:46:00,540 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:00,617 INFO L628 ElimStorePlain]: treesize reduction 43, result has 56.1 percent of original size [2021-06-05 04:46:00,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:46:00,623 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:00,653 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:46:00,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:46:00,658 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:00,687 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:46:00,688 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:46:00,688 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:124, output treesize:24 [2021-06-05 04:46:00,782 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:00,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347934615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:00,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:00,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 04:46:00,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897833773] [2021-06-05 04:46:00,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:46:00,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:00,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:46:00,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:46:00,783 INFO L87 Difference]: Start difference. First operand 304 states and 920 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:02,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:02,204 INFO L93 Difference]: Finished difference Result 858 states and 2428 transitions. [2021-06-05 04:46:02,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:46:02,204 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:46:02,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:02,205 INFO L225 Difference]: With dead ends: 858 [2021-06-05 04:46:02,205 INFO L226 Difference]: Without dead ends: 643 [2021-06-05 04:46:02,205 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 1410.3ms TimeCoverageRelationStatistics Valid=284, Invalid=838, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 04:46:02,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2021-06-05 04:46:02,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 317. [2021-06-05 04:46:02,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 2.990506329113924) internal successors, (945), 316 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:02,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 945 transitions. [2021-06-05 04:46:02,210 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 945 transitions. Word has length 22 [2021-06-05 04:46:02,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:02,212 INFO L482 AbstractCegarLoop]: Abstraction has 317 states and 945 transitions. [2021-06-05 04:46:02,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:02,213 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 945 transitions. [2021-06-05 04:46:02,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:46:02,213 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:02,213 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:02,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable798 [2021-06-05 04:46:02,429 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:02,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:02,429 INFO L82 PathProgramCache]: Analyzing trace with hash 129512560, now seen corresponding path program 53 times [2021-06-05 04:46:02,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:02,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487655420] [2021-06-05 04:46:02,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:02,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:02,569 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:02,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:02,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487655420] [2021-06-05 04:46:02,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487655420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:02,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015943100] [2021-06-05 04:46:02,570 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:02,618 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:46:02,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:02,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:46:02,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:02,768 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:02,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015943100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:02,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:02,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 04:46:02,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818645768] [2021-06-05 04:46:02,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:46:02,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:02,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:46:02,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:46:02,769 INFO L87 Difference]: Start difference. First operand 317 states and 945 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:03,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:03,379 INFO L93 Difference]: Finished difference Result 594 states and 1685 transitions. [2021-06-05 04:46:03,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:46:03,379 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:46:03,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:03,380 INFO L225 Difference]: With dead ends: 594 [2021-06-05 04:46:03,380 INFO L226 Difference]: Without dead ends: 435 [2021-06-05 04:46:03,380 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 681.1ms TimeCoverageRelationStatistics Valid=211, Invalid=719, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:46:03,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-06-05 04:46:03,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 304. [2021-06-05 04:46:03,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.943894389438944) internal successors, (892), 303 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:03,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 892 transitions. [2021-06-05 04:46:03,383 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 892 transitions. Word has length 22 [2021-06-05 04:46:03,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:03,384 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 892 transitions. [2021-06-05 04:46:03,384 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:03,384 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 892 transitions. [2021-06-05 04:46:03,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:46:03,384 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:03,384 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:03,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable850 [2021-06-05 04:46:03,589 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:03,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:03,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1694127950, now seen corresponding path program 54 times [2021-06-05 04:46:03,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:03,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210845186] [2021-06-05 04:46:03,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:03,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:03,654 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:03,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:03,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210845186] [2021-06-05 04:46:03,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210845186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:03,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251789524] [2021-06-05 04:46:03,655 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:03,715 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:46:03,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:03,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:46:03,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:03,808 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:03,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251789524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:03,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:03,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 04:46:03,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097921300] [2021-06-05 04:46:03,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:46:03,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:03,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:46:03,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:46:03,809 INFO L87 Difference]: Start difference. First operand 304 states and 892 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:04,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:04,038 INFO L93 Difference]: Finished difference Result 485 states and 1424 transitions. [2021-06-05 04:46:04,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:46:04,039 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:46:04,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:04,039 INFO L225 Difference]: With dead ends: 485 [2021-06-05 04:46:04,039 INFO L226 Difference]: Without dead ends: 485 [2021-06-05 04:46:04,039 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 181.6ms TimeCoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:46:04,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2021-06-05 04:46:04,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 319. [2021-06-05 04:46:04,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 2.9465408805031448) internal successors, (937), 318 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:04,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 937 transitions. [2021-06-05 04:46:04,043 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 937 transitions. Word has length 22 [2021-06-05 04:46:04,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:04,043 INFO L482 AbstractCegarLoop]: Abstraction has 319 states and 937 transitions. [2021-06-05 04:46:04,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:04,043 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 937 transitions. [2021-06-05 04:46:04,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:46:04,044 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:04,044 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:04,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable855,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:04,244 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:04,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:04,245 INFO L82 PathProgramCache]: Analyzing trace with hash -541317644, now seen corresponding path program 55 times [2021-06-05 04:46:04,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:04,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279747610] [2021-06-05 04:46:04,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:04,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:04,323 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:04,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:04,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279747610] [2021-06-05 04:46:04,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279747610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:04,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710164014] [2021-06-05 04:46:04,325 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:04,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:04,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:46:04,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:04,495 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:04,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710164014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:04,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:04,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:46:04,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499932693] [2021-06-05 04:46:04,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:46:04,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:04,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:46:04,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:46:04,497 INFO L87 Difference]: Start difference. First operand 319 states and 937 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:04,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:04,818 INFO L93 Difference]: Finished difference Result 594 states and 1723 transitions. [2021-06-05 04:46:04,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:46:04,818 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:46:04,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:04,819 INFO L225 Difference]: With dead ends: 594 [2021-06-05 04:46:04,819 INFO L226 Difference]: Without dead ends: 594 [2021-06-05 04:46:04,819 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 270.9ms TimeCoverageRelationStatistics Valid=177, Invalid=473, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:46:04,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-06-05 04:46:04,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 331. [2021-06-05 04:46:04,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 2.984848484848485) internal successors, (985), 330 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:04,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 985 transitions. [2021-06-05 04:46:04,823 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 985 transitions. Word has length 22 [2021-06-05 04:46:04,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:04,823 INFO L482 AbstractCegarLoop]: Abstraction has 331 states and 985 transitions. [2021-06-05 04:46:04,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:04,824 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 985 transitions. [2021-06-05 04:46:04,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:46:04,824 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:04,824 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:05,025 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable859,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:05,025 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:05,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:05,025 INFO L82 PathProgramCache]: Analyzing trace with hash 953285320, now seen corresponding path program 56 times [2021-06-05 04:46:05,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:05,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434405652] [2021-06-05 04:46:05,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:05,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:05,094 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:05,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:05,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434405652] [2021-06-05 04:46:05,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434405652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:05,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209318624] [2021-06-05 04:46:05,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:05,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:46:05,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:05,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:46:05,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:05,273 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:05,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209318624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:05,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:05,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:46:05,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751538217] [2021-06-05 04:46:05,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:46:05,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:05,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:46:05,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:46:05,274 INFO L87 Difference]: Start difference. First operand 331 states and 985 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:05,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:05,489 INFO L93 Difference]: Finished difference Result 573 states and 1658 transitions. [2021-06-05 04:46:05,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:46:05,490 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:46:05,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:05,490 INFO L225 Difference]: With dead ends: 573 [2021-06-05 04:46:05,490 INFO L226 Difference]: Without dead ends: 563 [2021-06-05 04:46:05,490 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 205.1ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:46:05,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-06-05 04:46:05,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 338. [2021-06-05 04:46:05,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 2.964391691394659) internal successors, (999), 337 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:05,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 999 transitions. [2021-06-05 04:46:05,495 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 999 transitions. Word has length 22 [2021-06-05 04:46:05,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:05,495 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 999 transitions. [2021-06-05 04:46:05,495 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:05,495 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 999 transitions. [2021-06-05 04:46:05,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:46:05,495 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:05,495 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:05,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable865,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:05,696 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:05,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:05,696 INFO L82 PathProgramCache]: Analyzing trace with hash 634173000, now seen corresponding path program 57 times [2021-06-05 04:46:05,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:05,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220445961] [2021-06-05 04:46:05,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:05,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:05,768 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:05,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:05,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220445961] [2021-06-05 04:46:05,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220445961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:05,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16134748] [2021-06-05 04:46:05,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:05,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:46:05,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:05,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:46:05,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:05,972 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:05,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16134748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:05,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:05,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:46:05,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751994045] [2021-06-05 04:46:05,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:46:05,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:05,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:46:05,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:46:05,973 INFO L87 Difference]: Start difference. First operand 338 states and 999 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:06,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:06,206 INFO L93 Difference]: Finished difference Result 506 states and 1487 transitions. [2021-06-05 04:46:06,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:46:06,207 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:46:06,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:06,207 INFO L225 Difference]: With dead ends: 506 [2021-06-05 04:46:06,207 INFO L226 Difference]: Without dead ends: 506 [2021-06-05 04:46:06,208 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 220.4ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:46:06,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-06-05 04:46:06,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 319. [2021-06-05 04:46:06,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 2.9465408805031448) internal successors, (937), 318 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:06,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 937 transitions. [2021-06-05 04:46:06,216 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 937 transitions. Word has length 22 [2021-06-05 04:46:06,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:06,216 INFO L482 AbstractCegarLoop]: Abstraction has 319 states and 937 transitions. [2021-06-05 04:46:06,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:06,216 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 937 transitions. [2021-06-05 04:46:06,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:46:06,218 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:06,218 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:06,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable871 [2021-06-05 04:46:06,418 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:06,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:06,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1424442098, now seen corresponding path program 58 times [2021-06-05 04:46:06,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:06,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360280680] [2021-06-05 04:46:06,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:06,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:06,490 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:06,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:06,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360280680] [2021-06-05 04:46:06,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360280680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:06,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342050144] [2021-06-05 04:46:06,491 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:06,553 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:46:06,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:06,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:46:06,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:06,673 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:06,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342050144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:06,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:06,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:46:06,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822909929] [2021-06-05 04:46:06,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:46:06,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:06,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:46:06,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:46:06,674 INFO L87 Difference]: Start difference. First operand 319 states and 937 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:06,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:06,952 INFO L93 Difference]: Finished difference Result 458 states and 1333 transitions. [2021-06-05 04:46:06,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:46:06,953 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:46:06,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:06,953 INFO L225 Difference]: With dead ends: 458 [2021-06-05 04:46:06,953 INFO L226 Difference]: Without dead ends: 458 [2021-06-05 04:46:06,953 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 266.5ms TimeCoverageRelationStatistics Valid=171, Invalid=479, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:46:06,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-06-05 04:46:06,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 328. [2021-06-05 04:46:06,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.9663608562691133) internal successors, (970), 327 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:06,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 970 transitions. [2021-06-05 04:46:06,957 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 970 transitions. Word has length 22 [2021-06-05 04:46:06,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:06,957 INFO L482 AbstractCegarLoop]: Abstraction has 328 states and 970 transitions. [2021-06-05 04:46:06,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:06,957 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 970 transitions. [2021-06-05 04:46:06,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:46:06,958 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:06,958 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:07,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable874,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:07,158 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:07,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:07,159 INFO L82 PathProgramCache]: Analyzing trace with hash 70160866, now seen corresponding path program 59 times [2021-06-05 04:46:07,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:07,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767738279] [2021-06-05 04:46:07,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:07,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:07,229 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:07,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:07,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767738279] [2021-06-05 04:46:07,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767738279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:07,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049720215] [2021-06-05 04:46:07,230 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:07,298 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:46:07,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:07,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:46:07,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:07,435 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:07,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049720215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:07,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:07,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:46:07,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223082976] [2021-06-05 04:46:07,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:46:07,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:07,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:46:07,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:46:07,436 INFO L87 Difference]: Start difference. First operand 328 states and 970 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:07,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:07,643 INFO L93 Difference]: Finished difference Result 475 states and 1370 transitions. [2021-06-05 04:46:07,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:46:07,643 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:46:07,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:07,644 INFO L225 Difference]: With dead ends: 475 [2021-06-05 04:46:07,644 INFO L226 Difference]: Without dead ends: 465 [2021-06-05 04:46:07,644 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 215.0ms TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:46:07,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-06-05 04:46:07,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 325. [2021-06-05 04:46:07,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.95679012345679) internal successors, (958), 324 states have internal predecessors, (958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:07,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 958 transitions. [2021-06-05 04:46:07,648 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 958 transitions. Word has length 22 [2021-06-05 04:46:07,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:07,648 INFO L482 AbstractCegarLoop]: Abstraction has 325 states and 958 transitions. [2021-06-05 04:46:07,648 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:07,648 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 958 transitions. [2021-06-05 04:46:07,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:46:07,649 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:07,649 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:07,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable879 [2021-06-05 04:46:07,849 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:07,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:07,849 INFO L82 PathProgramCache]: Analyzing trace with hash 495108076, now seen corresponding path program 60 times [2021-06-05 04:46:07,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:07,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368809945] [2021-06-05 04:46:07,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:07,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:07,912 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:07,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:07,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368809945] [2021-06-05 04:46:07,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368809945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:07,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018848241] [2021-06-05 04:46:07,912 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:07,994 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:46:07,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:07,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:46:07,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:08,141 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:08,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018848241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:08,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:08,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:46:08,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810114324] [2021-06-05 04:46:08,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:46:08,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:08,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:46:08,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:46:08,142 INFO L87 Difference]: Start difference. First operand 325 states and 958 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:08,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:08,285 INFO L93 Difference]: Finished difference Result 364 states and 1056 transitions. [2021-06-05 04:46:08,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:46:08,285 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:46:08,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:08,286 INFO L225 Difference]: With dead ends: 364 [2021-06-05 04:46:08,286 INFO L226 Difference]: Without dead ends: 344 [2021-06-05 04:46:08,286 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 188.1ms TimeCoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:46:08,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-06-05 04:46:08,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 322. [2021-06-05 04:46:08,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 2.9470404984423677) internal successors, (946), 321 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:08,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 946 transitions. [2021-06-05 04:46:08,289 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 946 transitions. Word has length 22 [2021-06-05 04:46:08,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:08,289 INFO L482 AbstractCegarLoop]: Abstraction has 322 states and 946 transitions. [2021-06-05 04:46:08,290 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:08,290 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 946 transitions. [2021-06-05 04:46:08,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:46:08,290 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:08,290 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:08,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable885,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:08,493 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:08,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:08,493 INFO L82 PathProgramCache]: Analyzing trace with hash 656029498, now seen corresponding path program 61 times [2021-06-05 04:46:08,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:08,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793144487] [2021-06-05 04:46:08,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:08,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:08,553 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:08,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:08,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793144487] [2021-06-05 04:46:08,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793144487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:08,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201624978] [2021-06-05 04:46:08,553 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:08,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:08,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:46:08,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:08,735 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:08,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201624978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:08,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:08,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:46:08,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890377666] [2021-06-05 04:46:08,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:46:08,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:08,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:46:08,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:46:08,737 INFO L87 Difference]: Start difference. First operand 322 states and 946 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:09,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:09,002 INFO L93 Difference]: Finished difference Result 488 states and 1415 transitions. [2021-06-05 04:46:09,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:46:09,003 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:46:09,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:09,003 INFO L225 Difference]: With dead ends: 488 [2021-06-05 04:46:09,003 INFO L226 Difference]: Without dead ends: 488 [2021-06-05 04:46:09,004 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 236.9ms TimeCoverageRelationStatistics Valid=157, Invalid=395, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:46:09,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-06-05 04:46:09,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 334. [2021-06-05 04:46:09,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 2.984984984984985) internal successors, (994), 333 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:09,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 994 transitions. [2021-06-05 04:46:09,007 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 994 transitions. Word has length 22 [2021-06-05 04:46:09,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:09,008 INFO L482 AbstractCegarLoop]: Abstraction has 334 states and 994 transitions. [2021-06-05 04:46:09,008 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:09,008 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 994 transitions. [2021-06-05 04:46:09,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:46:09,008 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:09,008 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:09,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable888 [2021-06-05 04:46:09,209 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:09,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:09,209 INFO L82 PathProgramCache]: Analyzing trace with hash -2144334834, now seen corresponding path program 62 times [2021-06-05 04:46:09,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:09,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024379764] [2021-06-05 04:46:09,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:09,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:09,275 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:09,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:09,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024379764] [2021-06-05 04:46:09,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024379764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:09,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108403159] [2021-06-05 04:46:09,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:09,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:46:09,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:09,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:46:09,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:09,445 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:09,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108403159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:09,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:09,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:46:09,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166377733] [2021-06-05 04:46:09,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:46:09,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:09,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:46:09,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:46:09,446 INFO L87 Difference]: Start difference. First operand 334 states and 994 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:09,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:09,628 INFO L93 Difference]: Finished difference Result 473 states and 1368 transitions. [2021-06-05 04:46:09,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:46:09,628 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:46:09,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:09,629 INFO L225 Difference]: With dead ends: 473 [2021-06-05 04:46:09,629 INFO L226 Difference]: Without dead ends: 463 [2021-06-05 04:46:09,629 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 167.8ms TimeCoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:46:09,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-06-05 04:46:09,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 341. [2021-06-05 04:46:09,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 2.9647058823529413) internal successors, (1008), 340 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:09,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1008 transitions. [2021-06-05 04:46:09,633 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1008 transitions. Word has length 22 [2021-06-05 04:46:09,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:09,633 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1008 transitions. [2021-06-05 04:46:09,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:09,633 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1008 transitions. [2021-06-05 04:46:09,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:46:09,633 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:09,634 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:09,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable894,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:09,834 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:09,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:09,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1831520142, now seen corresponding path program 63 times [2021-06-05 04:46:09,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:09,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430542991] [2021-06-05 04:46:09,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:09,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:09,904 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:09,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:09,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430542991] [2021-06-05 04:46:09,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430542991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:09,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146000074] [2021-06-05 04:46:09,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:09,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:46:09,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:09,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:46:09,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:10,123 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:10,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146000074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:10,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:10,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:46:10,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598805899] [2021-06-05 04:46:10,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:46:10,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:10,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:46:10,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:46:10,125 INFO L87 Difference]: Start difference. First operand 341 states and 1008 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:10,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:10,351 INFO L93 Difference]: Finished difference Result 400 states and 1179 transitions. [2021-06-05 04:46:10,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:46:10,351 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:46:10,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:10,352 INFO L225 Difference]: With dead ends: 400 [2021-06-05 04:46:10,352 INFO L226 Difference]: Without dead ends: 400 [2021-06-05 04:46:10,352 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 197.2ms TimeCoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:46:10,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-06-05 04:46:10,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 319. [2021-06-05 04:46:10,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 2.9465408805031448) internal successors, (937), 318 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:10,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 937 transitions. [2021-06-05 04:46:10,357 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 937 transitions. Word has length 22 [2021-06-05 04:46:10,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:10,357 INFO L482 AbstractCegarLoop]: Abstraction has 319 states and 937 transitions. [2021-06-05 04:46:10,357 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:10,357 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 937 transitions. [2021-06-05 04:46:10,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:46:10,357 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:10,358 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:10,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable900,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:10,578 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:10,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:10,578 INFO L82 PathProgramCache]: Analyzing trace with hash -640453132, now seen corresponding path program 64 times [2021-06-05 04:46:10,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:10,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296363346] [2021-06-05 04:46:10,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:10,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:10,646 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:10,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:10,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296363346] [2021-06-05 04:46:10,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296363346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:10,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403757543] [2021-06-05 04:46:10,647 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:10,697 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:46:10,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:10,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:46:10,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:10,811 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:10,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403757543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:10,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:10,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:46:10,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135683541] [2021-06-05 04:46:10,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:46:10,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:10,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:46:10,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:46:10,812 INFO L87 Difference]: Start difference. First operand 319 states and 937 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:11,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:11,020 INFO L93 Difference]: Finished difference Result 563 states and 1637 transitions. [2021-06-05 04:46:11,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:46:11,021 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:46:11,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:11,021 INFO L225 Difference]: With dead ends: 563 [2021-06-05 04:46:11,021 INFO L226 Difference]: Without dead ends: 563 [2021-06-05 04:46:11,022 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 207.6ms TimeCoverageRelationStatistics Valid=137, Invalid=369, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:46:11,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-06-05 04:46:11,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 337. [2021-06-05 04:46:11,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 2.9851190476190474) internal successors, (1003), 336 states have internal predecessors, (1003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:11,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1003 transitions. [2021-06-05 04:46:11,027 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1003 transitions. Word has length 22 [2021-06-05 04:46:11,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:11,027 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 1003 transitions. [2021-06-05 04:46:11,027 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:11,027 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1003 transitions. [2021-06-05 04:46:11,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:46:11,028 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:11,028 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:11,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable903 [2021-06-05 04:46:11,241 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:11,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:11,241 INFO L82 PathProgramCache]: Analyzing trace with hash 854149832, now seen corresponding path program 65 times [2021-06-05 04:46:11,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:11,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618843209] [2021-06-05 04:46:11,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:11,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:11,317 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:11,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:11,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618843209] [2021-06-05 04:46:11,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618843209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:11,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949565535] [2021-06-05 04:46:11,317 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:11,371 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:46:11,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:11,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:46:11,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:11,500 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:11,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949565535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:11,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:11,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:46:11,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556954981] [2021-06-05 04:46:11,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:46:11,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:11,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:46:11,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:46:11,501 INFO L87 Difference]: Start difference. First operand 337 states and 1003 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:12,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:12,053 INFO L93 Difference]: Finished difference Result 595 states and 1719 transitions. [2021-06-05 04:46:12,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:46:12,054 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:46:12,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:12,054 INFO L225 Difference]: With dead ends: 595 [2021-06-05 04:46:12,054 INFO L226 Difference]: Without dead ends: 585 [2021-06-05 04:46:12,055 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 455.3ms TimeCoverageRelationStatistics Valid=254, Invalid=868, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 04:46:12,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-06-05 04:46:12,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 334. [2021-06-05 04:46:12,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 2.975975975975976) internal successors, (991), 333 states have internal predecessors, (991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:12,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 991 transitions. [2021-06-05 04:46:12,059 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 991 transitions. Word has length 22 [2021-06-05 04:46:12,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:12,059 INFO L482 AbstractCegarLoop]: Abstraction has 334 states and 991 transitions. [2021-06-05 04:46:12,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:12,059 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 991 transitions. [2021-06-05 04:46:12,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:46:12,059 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:12,059 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:12,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable909 [2021-06-05 04:46:12,265 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:12,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:12,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1279097042, now seen corresponding path program 66 times [2021-06-05 04:46:12,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:12,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348088205] [2021-06-05 04:46:12,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:12,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:12,323 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:12,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:12,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348088205] [2021-06-05 04:46:12,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348088205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:12,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485360359] [2021-06-05 04:46:12,324 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:12,375 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:46:12,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:12,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:46:12,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:12,489 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:12,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485360359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:12,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:12,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:46:12,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817190425] [2021-06-05 04:46:12,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:46:12,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:12,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:46:12,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:46:12,490 INFO L87 Difference]: Start difference. First operand 334 states and 991 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:12,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:12,812 INFO L93 Difference]: Finished difference Result 572 states and 1665 transitions. [2021-06-05 04:46:12,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:46:12,813 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:46:12,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:12,813 INFO L225 Difference]: With dead ends: 572 [2021-06-05 04:46:12,813 INFO L226 Difference]: Without dead ends: 552 [2021-06-05 04:46:12,814 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 275.1ms TimeCoverageRelationStatistics Valid=166, Invalid=536, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:46:12,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2021-06-05 04:46:12,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 331. [2021-06-05 04:46:12,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 2.966666666666667) internal successors, (979), 330 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:12,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 979 transitions. [2021-06-05 04:46:12,818 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 979 transitions. Word has length 22 [2021-06-05 04:46:12,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:12,818 INFO L482 AbstractCegarLoop]: Abstraction has 331 states and 979 transitions. [2021-06-05 04:46:12,818 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:12,818 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 979 transitions. [2021-06-05 04:46:12,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:46:12,818 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:12,818 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:13,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable915,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:13,019 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:13,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:13,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1244273694, now seen corresponding path program 67 times [2021-06-05 04:46:13,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:13,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827769345] [2021-06-05 04:46:13,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:13,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:13,079 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:13,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:13,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827769345] [2021-06-05 04:46:13,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827769345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:13,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516888736] [2021-06-05 04:46:13,080 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:13,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:13,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:46:13,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:13,267 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:13,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516888736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:13,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:13,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:46:13,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585770119] [2021-06-05 04:46:13,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:46:13,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:13,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:46:13,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:46:13,268 INFO L87 Difference]: Start difference. First operand 331 states and 979 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:13,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:13,601 INFO L93 Difference]: Finished difference Result 515 states and 1495 transitions. [2021-06-05 04:46:13,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:46:13,601 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:46:13,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:13,602 INFO L225 Difference]: With dead ends: 515 [2021-06-05 04:46:13,602 INFO L226 Difference]: Without dead ends: 479 [2021-06-05 04:46:13,602 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 260.0ms TimeCoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:46:13,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2021-06-05 04:46:13,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 325. [2021-06-05 04:46:13,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.947530864197531) internal successors, (955), 324 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:13,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 955 transitions. [2021-06-05 04:46:13,607 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 955 transitions. Word has length 22 [2021-06-05 04:46:13,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:13,607 INFO L482 AbstractCegarLoop]: Abstraction has 325 states and 955 transitions. [2021-06-05 04:46:13,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:13,607 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 955 transitions. [2021-06-05 04:46:13,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:46:13,608 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:13,608 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:13,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable918,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:13,830 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:13,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:13,830 INFO L82 PathProgramCache]: Analyzing trace with hash 697114082, now seen corresponding path program 68 times [2021-06-05 04:46:13,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:13,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394175946] [2021-06-05 04:46:13,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:13,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:13,897 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:13,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:13,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394175946] [2021-06-05 04:46:13,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394175946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:13,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617035559] [2021-06-05 04:46:13,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:13,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:46:13,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:13,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:46:13,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:14,099 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:14,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617035559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:14,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:14,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:46:14,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576127733] [2021-06-05 04:46:14,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:46:14,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:14,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:46:14,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:46:14,101 INFO L87 Difference]: Start difference. First operand 325 states and 955 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:14,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:14,282 INFO L93 Difference]: Finished difference Result 461 states and 1343 transitions. [2021-06-05 04:46:14,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:46:14,283 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:46:14,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:14,283 INFO L225 Difference]: With dead ends: 461 [2021-06-05 04:46:14,283 INFO L226 Difference]: Without dead ends: 461 [2021-06-05 04:46:14,283 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 182.3ms TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:46:14,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-06-05 04:46:14,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 334. [2021-06-05 04:46:14,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 2.966966966966967) internal successors, (988), 333 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:14,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 988 transitions. [2021-06-05 04:46:14,287 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 988 transitions. Word has length 22 [2021-06-05 04:46:14,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:14,288 INFO L482 AbstractCegarLoop]: Abstraction has 334 states and 988 transitions. [2021-06-05 04:46:14,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:14,288 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 988 transitions. [2021-06-05 04:46:14,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:46:14,288 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:14,288 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:14,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable922,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:14,493 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:14,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:14,493 INFO L82 PathProgramCache]: Analyzing trace with hash -2103250250, now seen corresponding path program 69 times [2021-06-05 04:46:14,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:14,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126688156] [2021-06-05 04:46:14,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:14,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:14,564 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:14,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:14,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126688156] [2021-06-05 04:46:14,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126688156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:14,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663257193] [2021-06-05 04:46:14,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:14,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:46:14,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:14,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:46:14,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:14,750 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:14,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663257193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:14,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:14,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:46:14,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565912832] [2021-06-05 04:46:14,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:46:14,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:14,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:46:14,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:46:14,751 INFO L87 Difference]: Start difference. First operand 334 states and 988 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:15,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:15,010 INFO L93 Difference]: Finished difference Result 492 states and 1422 transitions. [2021-06-05 04:46:15,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:46:15,011 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:46:15,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:15,011 INFO L225 Difference]: With dead ends: 492 [2021-06-05 04:46:15,011 INFO L226 Difference]: Without dead ends: 482 [2021-06-05 04:46:15,011 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 253.5ms TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:46:15,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-06-05 04:46:15,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 331. [2021-06-05 04:46:15,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 2.9575757575757575) internal successors, (976), 330 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:15,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 976 transitions. [2021-06-05 04:46:15,016 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 976 transitions. Word has length 22 [2021-06-05 04:46:15,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:15,016 INFO L482 AbstractCegarLoop]: Abstraction has 331 states and 976 transitions. [2021-06-05 04:46:15,016 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:15,016 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 976 transitions. [2021-06-05 04:46:15,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:46:15,016 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:15,017 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:15,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable928 [2021-06-05 04:46:15,217 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:15,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:15,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1678303040, now seen corresponding path program 70 times [2021-06-05 04:46:15,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:15,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625994161] [2021-06-05 04:46:15,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:15,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:15,276 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:15,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:15,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625994161] [2021-06-05 04:46:15,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625994161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:15,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808904981] [2021-06-05 04:46:15,277 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:15,356 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:46:15,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:15,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:46:15,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:15,488 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:15,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808904981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:15,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:15,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:46:15,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103419465] [2021-06-05 04:46:15,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:46:15,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:15,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:46:15,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:46:15,489 INFO L87 Difference]: Start difference. First operand 331 states and 976 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:15,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:15,725 INFO L93 Difference]: Finished difference Result 446 states and 1303 transitions. [2021-06-05 04:46:15,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:46:15,726 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:46:15,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:15,726 INFO L225 Difference]: With dead ends: 446 [2021-06-05 04:46:15,726 INFO L226 Difference]: Without dead ends: 426 [2021-06-05 04:46:15,727 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 217.5ms TimeCoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:46:15,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2021-06-05 04:46:15,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 328. [2021-06-05 04:46:15,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.948012232415902) internal successors, (964), 327 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:15,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 964 transitions. [2021-06-05 04:46:15,732 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 964 transitions. Word has length 22 [2021-06-05 04:46:15,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:15,732 INFO L482 AbstractCegarLoop]: Abstraction has 328 states and 964 transitions. [2021-06-05 04:46:15,732 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:15,732 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 964 transitions. [2021-06-05 04:46:15,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:46:15,732 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:15,733 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:15,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable933,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:15,954 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:15,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:15,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1517381618, now seen corresponding path program 71 times [2021-06-05 04:46:15,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:15,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692465557] [2021-06-05 04:46:15,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:15,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:16,025 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:16,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:16,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692465557] [2021-06-05 04:46:16,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692465557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:16,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366649939] [2021-06-05 04:46:16,025 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:16,093 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:46:16,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:16,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:46:16,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:16,226 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:16,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366649939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:16,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:16,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:46:16,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600386159] [2021-06-05 04:46:16,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:46:16,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:16,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:46:16,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:46:16,227 INFO L87 Difference]: Start difference. First operand 328 states and 964 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:16,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:16,537 INFO L93 Difference]: Finished difference Result 502 states and 1458 transitions. [2021-06-05 04:46:16,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:46:16,538 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:46:16,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:16,538 INFO L225 Difference]: With dead ends: 502 [2021-06-05 04:46:16,538 INFO L226 Difference]: Without dead ends: 502 [2021-06-05 04:46:16,538 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 262.6ms TimeCoverageRelationStatistics Valid=151, Invalid=401, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:46:16,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-06-05 04:46:16,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 340. [2021-06-05 04:46:16,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 2.9852507374631267) internal successors, (1012), 339 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:16,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1012 transitions. [2021-06-05 04:46:16,542 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1012 transitions. Word has length 22 [2021-06-05 04:46:16,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:16,543 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1012 transitions. [2021-06-05 04:46:16,543 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:16,543 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1012 transitions. [2021-06-05 04:46:16,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:46:16,543 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:16,543 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:16,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable937,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:16,744 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:16,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:16,744 INFO L82 PathProgramCache]: Analyzing trace with hash -22778654, now seen corresponding path program 72 times [2021-06-05 04:46:16,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:16,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377147435] [2021-06-05 04:46:16,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:16,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:16,805 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:16,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:16,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377147435] [2021-06-05 04:46:16,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377147435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:16,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721995052] [2021-06-05 04:46:16,805 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:16,857 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:46:16,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:16,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:46:16,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:16,966 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:16,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721995052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:16,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:16,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:46:16,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057174304] [2021-06-05 04:46:16,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:46:16,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:16,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:46:16,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:46:16,967 INFO L87 Difference]: Start difference. First operand 340 states and 1012 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:17,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:17,131 INFO L93 Difference]: Finished difference Result 490 states and 1420 transitions. [2021-06-05 04:46:17,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:46:17,132 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:46:17,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:17,132 INFO L225 Difference]: With dead ends: 490 [2021-06-05 04:46:17,132 INFO L226 Difference]: Without dead ends: 480 [2021-06-05 04:46:17,133 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 162.1ms TimeCoverageRelationStatistics Valid=119, Invalid=301, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:46:17,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2021-06-05 04:46:17,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 347. [2021-06-05 04:46:17,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 2.9653179190751446) internal successors, (1026), 346 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:17,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1026 transitions. [2021-06-05 04:46:17,137 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1026 transitions. Word has length 22 [2021-06-05 04:46:17,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:17,137 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 1026 transitions. [2021-06-05 04:46:17,137 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:17,137 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1026 transitions. [2021-06-05 04:46:17,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:46:17,137 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:17,137 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:17,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable943,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:17,338 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:17,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:17,338 INFO L82 PathProgramCache]: Analyzing trace with hash -341890974, now seen corresponding path program 73 times [2021-06-05 04:46:17,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:17,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186193348] [2021-06-05 04:46:17,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:17,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:17,399 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:17,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:17,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186193348] [2021-06-05 04:46:17,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186193348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:17,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135370907] [2021-06-05 04:46:17,400 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:17,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:17,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:46:17,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:17,552 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:17,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135370907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:17,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:17,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 04:46:17,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488936093] [2021-06-05 04:46:17,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:46:17,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:17,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:46:17,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:46:17,554 INFO L87 Difference]: Start difference. First operand 347 states and 1026 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:17,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:17,760 INFO L93 Difference]: Finished difference Result 414 states and 1222 transitions. [2021-06-05 04:46:17,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:46:17,761 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:46:17,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:17,761 INFO L225 Difference]: With dead ends: 414 [2021-06-05 04:46:17,761 INFO L226 Difference]: Without dead ends: 414 [2021-06-05 04:46:17,761 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 159.8ms TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:46:17,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-06-05 04:46:17,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 319. [2021-06-05 04:46:17,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 2.9465408805031448) internal successors, (937), 318 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:17,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 937 transitions. [2021-06-05 04:46:17,765 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 937 transitions. Word has length 22 [2021-06-05 04:46:17,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:17,765 INFO L482 AbstractCegarLoop]: Abstraction has 319 states and 937 transitions. [2021-06-05 04:46:17,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:17,765 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 937 transitions. [2021-06-05 04:46:17,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:46:17,766 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:17,766 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:17,966 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable949,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:17,966 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:17,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:17,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1055430800, now seen corresponding path program 74 times [2021-06-05 04:46:17,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:17,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760603219] [2021-06-05 04:46:17,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:17,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:18,038 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:18,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:18,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760603219] [2021-06-05 04:46:18,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760603219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:18,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166545206] [2021-06-05 04:46:18,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:18,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:46:18,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:18,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:46:18,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:18,233 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:18,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166545206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:18,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:18,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 04:46:18,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449175420] [2021-06-05 04:46:18,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:46:18,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:18,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:46:18,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:46:18,235 INFO L87 Difference]: Start difference. First operand 319 states and 937 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:18,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:18,603 INFO L93 Difference]: Finished difference Result 554 states and 1630 transitions. [2021-06-05 04:46:18,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:46:18,604 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:46:18,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:18,604 INFO L225 Difference]: With dead ends: 554 [2021-06-05 04:46:18,604 INFO L226 Difference]: Without dead ends: 554 [2021-06-05 04:46:18,604 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 283.1ms TimeCoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:46:18,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-06-05 04:46:18,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 326. [2021-06-05 04:46:18,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.9476923076923076) internal successors, (958), 325 states have internal predecessors, (958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:18,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 958 transitions. [2021-06-05 04:46:18,608 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 958 transitions. Word has length 22 [2021-06-05 04:46:18,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:18,609 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 958 transitions. [2021-06-05 04:46:18,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:18,609 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 958 transitions. [2021-06-05 04:46:18,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:46:18,609 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:18,609 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:18,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable952,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:18,810 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:18,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:18,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1004090902, now seen corresponding path program 75 times [2021-06-05 04:46:18,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:18,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080339930] [2021-06-05 04:46:18,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:18,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:18,875 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:18,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:18,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080339930] [2021-06-05 04:46:18,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080339930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:18,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403227843] [2021-06-05 04:46:18,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:18,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:46:18,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:18,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:46:18,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:19,046 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:19,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403227843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:19,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:19,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:46:19,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082653712] [2021-06-05 04:46:19,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:46:19,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:19,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:46:19,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:46:19,047 INFO L87 Difference]: Start difference. First operand 326 states and 958 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:19,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:19,432 INFO L93 Difference]: Finished difference Result 651 states and 1893 transitions. [2021-06-05 04:46:19,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:46:19,432 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:46:19,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:19,433 INFO L225 Difference]: With dead ends: 651 [2021-06-05 04:46:19,433 INFO L226 Difference]: Without dead ends: 651 [2021-06-05 04:46:19,433 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 327.4ms TimeCoverageRelationStatistics Valid=160, Invalid=490, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:46:19,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2021-06-05 04:46:19,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 338. [2021-06-05 04:46:19,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 2.9851632047477743) internal successors, (1006), 337 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:19,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1006 transitions. [2021-06-05 04:46:19,439 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1006 transitions. Word has length 22 [2021-06-05 04:46:19,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:19,439 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 1006 transitions. [2021-06-05 04:46:19,439 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:19,439 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1006 transitions. [2021-06-05 04:46:19,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:46:19,440 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:19,440 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:19,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable956,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:19,640 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:19,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:19,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1796273430, now seen corresponding path program 76 times [2021-06-05 04:46:19,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:19,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925340985] [2021-06-05 04:46:19,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:19,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:19,706 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:19,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:19,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925340985] [2021-06-05 04:46:19,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925340985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:19,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578085424] [2021-06-05 04:46:19,707 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:19,759 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:46:19,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:19,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:46:19,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:19,872 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:19,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578085424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:19,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:19,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:46:19,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086915983] [2021-06-05 04:46:19,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:46:19,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:19,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:46:19,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:46:19,873 INFO L87 Difference]: Start difference. First operand 338 states and 1006 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:20,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:20,199 INFO L93 Difference]: Finished difference Result 642 states and 1864 transitions. [2021-06-05 04:46:20,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:46:20,200 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:46:20,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:20,200 INFO L225 Difference]: With dead ends: 642 [2021-06-05 04:46:20,200 INFO L226 Difference]: Without dead ends: 632 [2021-06-05 04:46:20,201 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 255.7ms TimeCoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:46:20,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2021-06-05 04:46:20,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 345. [2021-06-05 04:46:20,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 2.9651162790697674) internal successors, (1020), 344 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:20,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1020 transitions. [2021-06-05 04:46:20,205 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1020 transitions. Word has length 22 [2021-06-05 04:46:20,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:20,205 INFO L482 AbstractCegarLoop]: Abstraction has 345 states and 1020 transitions. [2021-06-05 04:46:20,205 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:20,205 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1020 transitions. [2021-06-05 04:46:20,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:46:20,205 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:20,206 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:20,406 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable961 [2021-06-05 04:46:20,406 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:20,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:20,406 INFO L82 PathProgramCache]: Analyzing trace with hash -2115385750, now seen corresponding path program 77 times [2021-06-05 04:46:20,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:20,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092394270] [2021-06-05 04:46:20,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:20,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:20,475 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:20,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:20,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092394270] [2021-06-05 04:46:20,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092394270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:20,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61349192] [2021-06-05 04:46:20,475 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:20,530 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:46:20,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:20,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:46:20,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:20,655 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:20,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61349192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:20,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:20,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:46:20,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142275886] [2021-06-05 04:46:20,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:46:20,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:20,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:46:20,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:46:20,656 INFO L87 Difference]: Start difference. First operand 345 states and 1020 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:20,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:20,972 INFO L93 Difference]: Finished difference Result 560 states and 1648 transitions. [2021-06-05 04:46:20,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:46:20,972 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:46:20,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:20,973 INFO L225 Difference]: With dead ends: 560 [2021-06-05 04:46:20,973 INFO L226 Difference]: Without dead ends: 560 [2021-06-05 04:46:20,973 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 245.5ms TimeCoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:46:20,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-06-05 04:46:20,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 323. [2021-06-05 04:46:20,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.9472049689440993) internal successors, (949), 322 states have internal predecessors, (949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:20,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 949 transitions. [2021-06-05 04:46:20,977 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 949 transitions. Word has length 22 [2021-06-05 04:46:20,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:20,977 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 949 transitions. [2021-06-05 04:46:20,977 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:20,977 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 949 transitions. [2021-06-05 04:46:20,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:46:20,978 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:20,978 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:21,191 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable966,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:21,191 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:21,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:21,192 INFO L82 PathProgramCache]: Analyzing trace with hash 120966448, now seen corresponding path program 78 times [2021-06-05 04:46:21,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:21,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740633754] [2021-06-05 04:46:21,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:21,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:21,268 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:21,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:21,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740633754] [2021-06-05 04:46:21,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740633754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:21,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196017459] [2021-06-05 04:46:21,268 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:21,322 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:46:21,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:21,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:46:21,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:21,437 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:21,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196017459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:21,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:21,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:46:21,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641163250] [2021-06-05 04:46:21,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:46:21,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:21,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:46:21,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:46:21,438 INFO L87 Difference]: Start difference. First operand 323 states and 949 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:21,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:21,732 INFO L93 Difference]: Finished difference Result 503 states and 1467 transitions. [2021-06-05 04:46:21,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:46:21,732 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:46:21,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:21,733 INFO L225 Difference]: With dead ends: 503 [2021-06-05 04:46:21,733 INFO L226 Difference]: Without dead ends: 503 [2021-06-05 04:46:21,733 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 271.8ms TimeCoverageRelationStatistics Valid=157, Invalid=443, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:46:21,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2021-06-05 04:46:21,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 332. [2021-06-05 04:46:21,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 2.9667673716012084) internal successors, (982), 331 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:21,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 982 transitions. [2021-06-05 04:46:21,737 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 982 transitions. Word has length 22 [2021-06-05 04:46:21,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:21,737 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 982 transitions. [2021-06-05 04:46:21,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:21,737 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 982 transitions. [2021-06-05 04:46:21,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:46:21,738 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:21,738 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:21,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable970,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:21,938 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:21,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:21,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1615569412, now seen corresponding path program 79 times [2021-06-05 04:46:21,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:21,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46209851] [2021-06-05 04:46:21,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:21,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:22,009 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:22,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:22,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46209851] [2021-06-05 04:46:22,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46209851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:22,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067141738] [2021-06-05 04:46:22,010 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:22,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:22,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:46:22,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:22,201 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:22,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067141738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:22,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:22,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:46:22,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275954177] [2021-06-05 04:46:22,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:46:22,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:22,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:46:22,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:46:22,202 INFO L87 Difference]: Start difference. First operand 332 states and 982 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:22,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:22,509 INFO L93 Difference]: Finished difference Result 523 states and 1513 transitions. [2021-06-05 04:46:22,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:46:22,509 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:46:22,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:22,510 INFO L225 Difference]: With dead ends: 523 [2021-06-05 04:46:22,510 INFO L226 Difference]: Without dead ends: 513 [2021-06-05 04:46:22,510 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 242.7ms TimeCoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:46:22,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-06-05 04:46:22,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 329. [2021-06-05 04:46:22,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.957317073170732) internal successors, (970), 328 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:22,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 970 transitions. [2021-06-05 04:46:22,514 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 970 transitions. Word has length 22 [2021-06-05 04:46:22,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:22,514 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 970 transitions. [2021-06-05 04:46:22,514 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:22,514 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 970 transitions. [2021-06-05 04:46:22,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:46:22,515 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:22,515 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:22,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable975 [2021-06-05 04:46:22,729 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:22,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:22,729 INFO L82 PathProgramCache]: Analyzing trace with hash 2040516622, now seen corresponding path program 80 times [2021-06-05 04:46:22,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:22,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226838303] [2021-06-05 04:46:22,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:22,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:22,794 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:22,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:22,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226838303] [2021-06-05 04:46:22,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226838303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:22,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614739664] [2021-06-05 04:46:22,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:22,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:46:22,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:22,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:46:22,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:22,968 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:22,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614739664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:22,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:22,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:46:22,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693820899] [2021-06-05 04:46:22,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:46:22,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:22,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:46:22,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:46:22,969 INFO L87 Difference]: Start difference. First operand 329 states and 970 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:23,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:23,179 INFO L93 Difference]: Finished difference Result 412 states and 1199 transitions. [2021-06-05 04:46:23,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:46:23,179 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:46:23,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:23,180 INFO L225 Difference]: With dead ends: 412 [2021-06-05 04:46:23,180 INFO L226 Difference]: Without dead ends: 392 [2021-06-05 04:46:23,180 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 217.6ms TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:46:23,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-06-05 04:46:23,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 326. [2021-06-05 04:46:23,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.9476923076923076) internal successors, (958), 325 states have internal predecessors, (958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:23,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 958 transitions. [2021-06-05 04:46:23,184 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 958 transitions. Word has length 22 [2021-06-05 04:46:23,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:23,184 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 958 transitions. [2021-06-05 04:46:23,184 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:23,184 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 958 transitions. [2021-06-05 04:46:23,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:46:23,184 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:23,184 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:23,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable980,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:23,385 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:23,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:23,385 INFO L82 PathProgramCache]: Analyzing trace with hash -2093529252, now seen corresponding path program 81 times [2021-06-05 04:46:23,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:23,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167401455] [2021-06-05 04:46:23,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:23,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:23,456 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:23,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:23,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167401455] [2021-06-05 04:46:23,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167401455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:23,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098576143] [2021-06-05 04:46:23,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:23,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:46:23,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:23,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:46:23,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:23,621 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:23,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098576143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:23,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:23,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:46:23,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033632213] [2021-06-05 04:46:23,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:46:23,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:23,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:46:23,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:46:23,622 INFO L87 Difference]: Start difference. First operand 326 states and 958 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:23,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:23,928 INFO L93 Difference]: Finished difference Result 551 states and 1603 transitions. [2021-06-05 04:46:23,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:46:23,928 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:46:23,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:23,929 INFO L225 Difference]: With dead ends: 551 [2021-06-05 04:46:23,929 INFO L226 Difference]: Without dead ends: 551 [2021-06-05 04:46:23,929 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 252.0ms TimeCoverageRelationStatistics Valid=147, Invalid=405, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:46:23,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2021-06-05 04:46:23,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 338. [2021-06-05 04:46:23,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 2.9851632047477743) internal successors, (1006), 337 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:23,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1006 transitions. [2021-06-05 04:46:23,933 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1006 transitions. Word has length 22 [2021-06-05 04:46:23,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:23,933 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 1006 transitions. [2021-06-05 04:46:23,933 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:23,933 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1006 transitions. [2021-06-05 04:46:23,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:46:23,934 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:23,934 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:24,134 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable983 [2021-06-05 04:46:24,134 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:24,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:24,134 INFO L82 PathProgramCache]: Analyzing trace with hash -598926288, now seen corresponding path program 82 times [2021-06-05 04:46:24,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:24,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780430292] [2021-06-05 04:46:24,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:24,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:24,205 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:24,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:24,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780430292] [2021-06-05 04:46:24,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780430292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:24,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003428000] [2021-06-05 04:46:24,205 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:24,259 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:46:24,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:24,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:46:24,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:24,372 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:24,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003428000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:24,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:24,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:46:24,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322913675] [2021-06-05 04:46:24,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:46:24,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:24,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:46:24,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:46:24,373 INFO L87 Difference]: Start difference. First operand 338 states and 1006 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:24,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:24,599 INFO L93 Difference]: Finished difference Result 530 states and 1538 transitions. [2021-06-05 04:46:24,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:46:24,600 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:46:24,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:24,600 INFO L225 Difference]: With dead ends: 530 [2021-06-05 04:46:24,600 INFO L226 Difference]: Without dead ends: 520 [2021-06-05 04:46:24,601 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 208.5ms TimeCoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:46:24,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-06-05 04:46:24,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 345. [2021-06-05 04:46:24,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 2.9651162790697674) internal successors, (1020), 344 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:24,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1020 transitions. [2021-06-05 04:46:24,604 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1020 transitions. Word has length 22 [2021-06-05 04:46:24,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:24,605 INFO L482 AbstractCegarLoop]: Abstraction has 345 states and 1020 transitions. [2021-06-05 04:46:24,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:24,605 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1020 transitions. [2021-06-05 04:46:24,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:46:24,605 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:24,605 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:24,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable988,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:24,806 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:24,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:24,806 INFO L82 PathProgramCache]: Analyzing trace with hash -918038608, now seen corresponding path program 83 times [2021-06-05 04:46:24,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:24,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247918645] [2021-06-05 04:46:24,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:24,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:24,872 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:24,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:24,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247918645] [2021-06-05 04:46:24,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247918645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:24,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526172907] [2021-06-05 04:46:24,872 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:24,927 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:46:24,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:24,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:46:24,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:25,037 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:25,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526172907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:25,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:25,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:46:25,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483875039] [2021-06-05 04:46:25,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:46:25,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:25,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:46:25,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:46:25,038 INFO L87 Difference]: Start difference. First operand 345 states and 1020 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:25,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:25,292 INFO L93 Difference]: Finished difference Result 451 states and 1331 transitions. [2021-06-05 04:46:25,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:46:25,293 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:46:25,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:25,293 INFO L225 Difference]: With dead ends: 451 [2021-06-05 04:46:25,293 INFO L226 Difference]: Without dead ends: 451 [2021-06-05 04:46:25,293 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 230.7ms TimeCoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:46:25,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-06-05 04:46:25,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 320. [2021-06-05 04:46:25,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 2.946708463949843) internal successors, (940), 319 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:25,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 940 transitions. [2021-06-05 04:46:25,299 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 940 transitions. Word has length 22 [2021-06-05 04:46:25,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:25,299 INFO L482 AbstractCegarLoop]: Abstraction has 320 states and 940 transitions. [2021-06-05 04:46:25,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:25,299 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 940 transitions. [2021-06-05 04:46:25,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:46:25,300 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:25,300 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:25,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable993 [2021-06-05 04:46:25,505 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:25,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:25,505 INFO L82 PathProgramCache]: Analyzing trace with hash -132951768, now seen corresponding path program 84 times [2021-06-05 04:46:25,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:25,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530254119] [2021-06-05 04:46:25,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:25,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:25,569 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:25,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:25,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530254119] [2021-06-05 04:46:25,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530254119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:25,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647784518] [2021-06-05 04:46:25,570 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:25,625 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:46:25,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:25,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:46:25,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:25,758 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:25,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647784518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:25,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:25,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 04:46:25,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363069329] [2021-06-05 04:46:25,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:46:25,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:25,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:46:25,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:46:25,758 INFO L87 Difference]: Start difference. First operand 320 states and 940 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:26,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:26,120 INFO L93 Difference]: Finished difference Result 736 states and 2158 transitions. [2021-06-05 04:46:26,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:46:26,121 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:46:26,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:26,121 INFO L225 Difference]: With dead ends: 736 [2021-06-05 04:46:26,122 INFO L226 Difference]: Without dead ends: 736 [2021-06-05 04:46:26,122 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 325.5ms TimeCoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:46:26,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2021-06-05 04:46:26,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 328. [2021-06-05 04:46:26,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.9602446483180427) internal successors, (968), 327 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:26,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 968 transitions. [2021-06-05 04:46:26,126 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 968 transitions. Word has length 22 [2021-06-05 04:46:26,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:26,126 INFO L482 AbstractCegarLoop]: Abstraction has 328 states and 968 transitions. [2021-06-05 04:46:26,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:26,126 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 968 transitions. [2021-06-05 04:46:26,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:46:26,127 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:26,127 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:26,331 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable997,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:26,332 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:26,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:26,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1926569934, now seen corresponding path program 85 times [2021-06-05 04:46:26,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:26,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276476623] [2021-06-05 04:46:26,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:26,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:26,402 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:26,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:26,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276476623] [2021-06-05 04:46:26,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276476623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:26,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685716628] [2021-06-05 04:46:26,402 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:26,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:26,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:46:26,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:26,605 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:26,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685716628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:26,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:26,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:46:26,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927714093] [2021-06-05 04:46:26,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:46:26,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:26,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:46:26,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:46:26,606 INFO L87 Difference]: Start difference. First operand 328 states and 968 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:27,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:27,115 INFO L93 Difference]: Finished difference Result 755 states and 2196 transitions. [2021-06-05 04:46:27,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:46:27,116 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:46:27,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:27,116 INFO L225 Difference]: With dead ends: 755 [2021-06-05 04:46:27,116 INFO L226 Difference]: Without dead ends: 755 [2021-06-05 04:46:27,117 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 436.5ms TimeCoverageRelationStatistics Valid=185, Invalid=517, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:46:27,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2021-06-05 04:46:27,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 340. [2021-06-05 04:46:27,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 2.9970501474926254) internal successors, (1016), 339 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:27,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1016 transitions. [2021-06-05 04:46:27,123 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1016 transitions. Word has length 22 [2021-06-05 04:46:27,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:27,123 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1016 transitions. [2021-06-05 04:46:27,123 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:27,123 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1016 transitions. [2021-06-05 04:46:27,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:46:27,124 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:27,124 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:27,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1002 [2021-06-05 04:46:27,333 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:27,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:27,333 INFO L82 PathProgramCache]: Analyzing trace with hash -873794398, now seen corresponding path program 86 times [2021-06-05 04:46:27,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:27,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380881720] [2021-06-05 04:46:27,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:27,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:27,403 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:27,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:27,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380881720] [2021-06-05 04:46:27,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380881720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:27,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166433410] [2021-06-05 04:46:27,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:27,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:46:27,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:27,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:46:27,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:27,582 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:27,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166433410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:27,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:27,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:46:27,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345949559] [2021-06-05 04:46:27,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:46:27,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:27,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:46:27,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:46:27,583 INFO L87 Difference]: Start difference. First operand 340 states and 1016 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:27,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:27,976 INFO L93 Difference]: Finished difference Result 758 states and 2203 transitions. [2021-06-05 04:46:27,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:46:27,976 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:46:27,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:27,977 INFO L225 Difference]: With dead ends: 758 [2021-06-05 04:46:27,977 INFO L226 Difference]: Without dead ends: 748 [2021-06-05 04:46:27,977 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 311.5ms TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:46:27,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2021-06-05 04:46:27,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 347. [2021-06-05 04:46:27,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 2.976878612716763) internal successors, (1030), 346 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:27,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1030 transitions. [2021-06-05 04:46:27,982 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1030 transitions. Word has length 22 [2021-06-05 04:46:27,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:27,982 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 1030 transitions. [2021-06-05 04:46:27,982 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:27,982 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1030 transitions. [2021-06-05 04:46:27,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:46:27,983 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:27,983 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:28,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1010,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:28,202 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:28,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:28,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1192906718, now seen corresponding path program 87 times [2021-06-05 04:46:28,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:28,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505917686] [2021-06-05 04:46:28,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:28,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:28,274 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:28,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:28,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505917686] [2021-06-05 04:46:28,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505917686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:28,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443695359] [2021-06-05 04:46:28,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:28,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:46:28,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:28,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:46:28,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:28,470 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:28,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443695359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:28,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:28,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:46:28,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491390405] [2021-06-05 04:46:28,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:46:28,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:28,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:46:28,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:46:28,471 INFO L87 Difference]: Start difference. First operand 347 states and 1030 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:28,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:28,841 INFO L93 Difference]: Finished difference Result 686 states and 2019 transitions. [2021-06-05 04:46:28,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:46:28,841 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:46:28,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:28,842 INFO L225 Difference]: With dead ends: 686 [2021-06-05 04:46:28,842 INFO L226 Difference]: Without dead ends: 686 [2021-06-05 04:46:28,842 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 327.5ms TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:46:28,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2021-06-05 04:46:28,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 341. [2021-06-05 04:46:28,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 2.976470588235294) internal successors, (1012), 340 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:28,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1012 transitions. [2021-06-05 04:46:28,847 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1012 transitions. Word has length 22 [2021-06-05 04:46:28,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:28,847 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1012 transitions. [2021-06-05 04:46:28,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:28,847 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1012 transitions. [2021-06-05 04:46:28,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:46:28,847 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:28,847 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:29,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1019,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:29,048 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:29,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:29,048 INFO L82 PathProgramCache]: Analyzing trace with hash -241741712, now seen corresponding path program 88 times [2021-06-05 04:46:29,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:29,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624784989] [2021-06-05 04:46:29,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:29,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:29,111 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:29,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:29,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624784989] [2021-06-05 04:46:29,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624784989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:29,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603217096] [2021-06-05 04:46:29,111 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:29,168 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:46:29,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:29,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:46:29,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:29,299 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:29,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603217096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:29,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:29,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 04:46:29,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974454057] [2021-06-05 04:46:29,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:46:29,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:29,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:46:29,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:46:29,300 INFO L87 Difference]: Start difference. First operand 341 states and 1012 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:29,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:29,697 INFO L93 Difference]: Finished difference Result 621 states and 1823 transitions. [2021-06-05 04:46:29,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:46:29,697 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:46:29,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:29,698 INFO L225 Difference]: With dead ends: 621 [2021-06-05 04:46:29,698 INFO L226 Difference]: Without dead ends: 621 [2021-06-05 04:46:29,698 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 340.6ms TimeCoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:46:29,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2021-06-05 04:46:29,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 324. [2021-06-05 04:46:29,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.9473684210526314) internal successors, (952), 323 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:29,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 952 transitions. [2021-06-05 04:46:29,705 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 952 transitions. Word has length 22 [2021-06-05 04:46:29,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:29,705 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 952 transitions. [2021-06-05 04:46:29,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:29,706 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 952 transitions. [2021-06-05 04:46:29,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:46:29,706 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:29,706 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:29,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1026,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:29,921 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:29,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:29,921 INFO L82 PathProgramCache]: Analyzing trace with hash 968794932, now seen corresponding path program 89 times [2021-06-05 04:46:29,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:29,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799015015] [2021-06-05 04:46:29,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:29,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:29,994 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:29,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:29,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799015015] [2021-06-05 04:46:29,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799015015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:29,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038006005] [2021-06-05 04:46:29,995 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:30,051 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:46:30,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:30,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:46:30,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:30,169 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:30,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038006005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:30,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:30,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 04:46:30,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085149022] [2021-06-05 04:46:30,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:46:30,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:30,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:46:30,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:46:30,170 INFO L87 Difference]: Start difference. First operand 324 states and 952 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:30,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:30,492 INFO L93 Difference]: Finished difference Result 633 states and 1841 transitions. [2021-06-05 04:46:30,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:46:30,492 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:46:30,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:30,493 INFO L225 Difference]: With dead ends: 633 [2021-06-05 04:46:30,493 INFO L226 Difference]: Without dead ends: 633 [2021-06-05 04:46:30,493 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 302.9ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:46:30,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2021-06-05 04:46:30,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 336. [2021-06-05 04:46:30,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 2.985074626865672) internal successors, (1000), 335 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:30,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1000 transitions. [2021-06-05 04:46:30,498 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1000 transitions. Word has length 22 [2021-06-05 04:46:30,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:30,498 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 1000 transitions. [2021-06-05 04:46:30,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:30,498 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1000 transitions. [2021-06-05 04:46:30,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:46:30,498 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:30,498 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:30,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1031,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:30,699 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:30,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:30,699 INFO L82 PathProgramCache]: Analyzing trace with hash 1983309410, now seen corresponding path program 90 times [2021-06-05 04:46:30,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:30,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969960669] [2021-06-05 04:46:30,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:30,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:30,766 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:30,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:30,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969960669] [2021-06-05 04:46:30,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969960669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:30,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686814835] [2021-06-05 04:46:30,766 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:30,822 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:46:30,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:30,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:46:30,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:30,950 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:30,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686814835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:30,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:30,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 04:46:30,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26675559] [2021-06-05 04:46:30,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:46:30,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:30,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:46:30,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:46:30,951 INFO L87 Difference]: Start difference. First operand 336 states and 1000 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:31,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:31,342 INFO L93 Difference]: Finished difference Result 603 states and 1751 transitions. [2021-06-05 04:46:31,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:46:31,342 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:46:31,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:31,343 INFO L225 Difference]: With dead ends: 603 [2021-06-05 04:46:31,343 INFO L226 Difference]: Without dead ends: 594 [2021-06-05 04:46:31,344 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 318.7ms TimeCoverageRelationStatistics Valid=134, Invalid=418, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:46:31,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-06-05 04:46:31,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 342. [2021-06-05 04:46:31,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 2.967741935483871) internal successors, (1012), 341 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:31,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1012 transitions. [2021-06-05 04:46:31,349 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1012 transitions. Word has length 22 [2021-06-05 04:46:31,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:31,349 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 1012 transitions. [2021-06-05 04:46:31,350 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:31,350 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1012 transitions. [2021-06-05 04:46:31,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:46:31,350 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:31,350 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:31,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1037 [2021-06-05 04:46:31,569 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:31,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:31,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1137989188, now seen corresponding path program 91 times [2021-06-05 04:46:31,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:31,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322682997] [2021-06-05 04:46:31,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:31,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:31,639 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:31,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:31,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322682997] [2021-06-05 04:46:31,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322682997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:31,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248001480] [2021-06-05 04:46:31,639 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:31,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:31,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:46:31,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:31,816 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:31,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248001480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:31,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:31,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 04:46:31,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133339018] [2021-06-05 04:46:31,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:46:31,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:31,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:46:31,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:46:31,817 INFO L87 Difference]: Start difference. First operand 342 states and 1012 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:32,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:32,136 INFO L93 Difference]: Finished difference Result 546 states and 1607 transitions. [2021-06-05 04:46:32,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:46:32,136 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:46:32,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:32,137 INFO L225 Difference]: With dead ends: 546 [2021-06-05 04:46:32,137 INFO L226 Difference]: Without dead ends: 546 [2021-06-05 04:46:32,137 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 299.5ms TimeCoverageRelationStatistics Valid=138, Invalid=414, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:46:32,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-06-05 04:46:32,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 324. [2021-06-05 04:46:32,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.9473684210526314) internal successors, (952), 323 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:32,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 952 transitions. [2021-06-05 04:46:32,141 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 952 transitions. Word has length 22 [2021-06-05 04:46:32,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:32,141 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 952 transitions. [2021-06-05 04:46:32,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:32,141 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 952 transitions. [2021-06-05 04:46:32,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:46:32,141 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:32,141 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:32,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1042,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:32,342 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:32,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:32,342 INFO L82 PathProgramCache]: Analyzing trace with hash -2141572440, now seen corresponding path program 92 times [2021-06-05 04:46:32,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:32,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489277778] [2021-06-05 04:46:32,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:32,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:32,421 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:32,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:32,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489277778] [2021-06-05 04:46:32,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489277778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:32,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925000630] [2021-06-05 04:46:32,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:32,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:46:32,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:32,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:46:32,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:32,652 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:32,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925000630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:32,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:32,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:46:32,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895629600] [2021-06-05 04:46:32,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:46:32,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:32,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:46:32,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:46:32,653 INFO L87 Difference]: Start difference. First operand 324 states and 952 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:33,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:33,123 INFO L93 Difference]: Finished difference Result 733 states and 2130 transitions. [2021-06-05 04:46:33,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:46:33,123 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:46:33,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:33,124 INFO L225 Difference]: With dead ends: 733 [2021-06-05 04:46:33,124 INFO L226 Difference]: Without dead ends: 733 [2021-06-05 04:46:33,124 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 477.9ms TimeCoverageRelationStatistics Valid=192, Invalid=510, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:46:33,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2021-06-05 04:46:33,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 338. [2021-06-05 04:46:33,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 3.0118694362017804) internal successors, (1015), 337 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:33,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1015 transitions. [2021-06-05 04:46:33,129 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1015 transitions. Word has length 22 [2021-06-05 04:46:33,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:33,129 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 1015 transitions. [2021-06-05 04:46:33,129 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:33,129 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1015 transitions. [2021-06-05 04:46:33,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:46:33,130 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:33,130 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:33,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1048 [2021-06-05 04:46:33,333 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:33,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:33,333 INFO L82 PathProgramCache]: Analyzing trace with hash -646969476, now seen corresponding path program 93 times [2021-06-05 04:46:33,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:33,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224197169] [2021-06-05 04:46:33,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:33,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:33,418 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:33,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:33,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224197169] [2021-06-05 04:46:33,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224197169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:33,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705449873] [2021-06-05 04:46:33,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:33,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:46:33,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:33,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:46:33,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:33,648 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:33,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705449873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:33,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:33,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:46:33,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73033698] [2021-06-05 04:46:33,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:46:33,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:33,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:46:33,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:46:33,649 INFO L87 Difference]: Start difference. First operand 338 states and 1015 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:34,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:34,077 INFO L93 Difference]: Finished difference Result 767 states and 2208 transitions. [2021-06-05 04:46:34,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:46:34,077 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:46:34,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:34,078 INFO L225 Difference]: With dead ends: 767 [2021-06-05 04:46:34,078 INFO L226 Difference]: Without dead ends: 757 [2021-06-05 04:46:34,078 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 431.1ms TimeCoverageRelationStatistics Valid=171, Invalid=479, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:46:34,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2021-06-05 04:46:34,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 345. [2021-06-05 04:46:34,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 2.991279069767442) internal successors, (1029), 344 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:34,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1029 transitions. [2021-06-05 04:46:34,083 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1029 transitions. Word has length 22 [2021-06-05 04:46:34,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:34,083 INFO L482 AbstractCegarLoop]: Abstraction has 345 states and 1029 transitions. [2021-06-05 04:46:34,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:34,083 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1029 transitions. [2021-06-05 04:46:34,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:46:34,083 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:34,083 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:34,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1062,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:34,284 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:34,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:34,284 INFO L82 PathProgramCache]: Analyzing trace with hash 803562480, now seen corresponding path program 94 times [2021-06-05 04:46:34,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:34,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833355844] [2021-06-05 04:46:34,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:34,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:34,360 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:34,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:34,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833355844] [2021-06-05 04:46:34,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833355844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:34,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203292433] [2021-06-05 04:46:34,360 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:34,419 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:46:34,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:34,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:46:34,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:34,554 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:34,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203292433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:34,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:34,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:46:34,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856541770] [2021-06-05 04:46:34,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:46:34,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:34,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:46:34,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:46:34,555 INFO L87 Difference]: Start difference. First operand 345 states and 1029 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:34,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:34,912 INFO L93 Difference]: Finished difference Result 745 states and 2169 transitions. [2021-06-05 04:46:34,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:46:34,912 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:46:34,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:34,913 INFO L225 Difference]: With dead ends: 745 [2021-06-05 04:46:34,913 INFO L226 Difference]: Without dead ends: 745 [2021-06-05 04:46:34,913 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 314.7ms TimeCoverageRelationStatistics Valid=144, Invalid=408, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:46:34,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745 states. [2021-06-05 04:46:34,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745 to 351. [2021-06-05 04:46:34,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 3.0171428571428573) internal successors, (1056), 350 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:34,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1056 transitions. [2021-06-05 04:46:34,918 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1056 transitions. Word has length 22 [2021-06-05 04:46:34,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:34,918 INFO L482 AbstractCegarLoop]: Abstraction has 351 states and 1056 transitions. [2021-06-05 04:46:34,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:34,918 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1056 transitions. [2021-06-05 04:46:34,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:46:34,918 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:34,918 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:35,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1076,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:35,119 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:35,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:35,119 INFO L82 PathProgramCache]: Analyzing trace with hash -708456964, now seen corresponding path program 95 times [2021-06-05 04:46:35,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:35,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514049715] [2021-06-05 04:46:35,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:35,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:35,199 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:35,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:35,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514049715] [2021-06-05 04:46:35,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514049715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:35,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86617258] [2021-06-05 04:46:35,199 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:35,259 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:46:35,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:35,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:46:35,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:35,430 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:35,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86617258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:35,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:35,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:46:35,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281488086] [2021-06-05 04:46:35,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:46:35,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:35,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:46:35,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:46:35,431 INFO L87 Difference]: Start difference. First operand 351 states and 1056 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:35,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:35,889 INFO L93 Difference]: Finished difference Result 754 states and 2175 transitions. [2021-06-05 04:46:35,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:46:35,889 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:46:35,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:35,890 INFO L225 Difference]: With dead ends: 754 [2021-06-05 04:46:35,890 INFO L226 Difference]: Without dead ends: 745 [2021-06-05 04:46:35,890 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 419.5ms TimeCoverageRelationStatistics Valid=175, Invalid=475, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:46:35,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745 states. [2021-06-05 04:46:35,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745 to 357. [2021-06-05 04:46:35,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 3.0) internal successors, (1068), 356 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:35,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 1068 transitions. [2021-06-05 04:46:35,900 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 1068 transitions. Word has length 22 [2021-06-05 04:46:35,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:35,901 INFO L482 AbstractCegarLoop]: Abstraction has 357 states and 1068 transitions. [2021-06-05 04:46:35,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:35,901 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 1068 transitions. [2021-06-05 04:46:35,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:46:35,901 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:35,902 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:36,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1089 [2021-06-05 04:46:36,124 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:36,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:36,124 INFO L82 PathProgramCache]: Analyzing trace with hash -931017330, now seen corresponding path program 96 times [2021-06-05 04:46:36,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:36,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576865248] [2021-06-05 04:46:36,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:36,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:36,195 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:36,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:36,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576865248] [2021-06-05 04:46:36,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576865248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:36,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182774000] [2021-06-05 04:46:36,195 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:36,254 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:46:36,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:36,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:46:36,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:36,388 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:36,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182774000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:36,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:36,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 04:46:36,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309234144] [2021-06-05 04:46:36,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:46:36,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:36,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:46:36,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:46:36,389 INFO L87 Difference]: Start difference. First operand 357 states and 1068 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:36,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:36,817 INFO L93 Difference]: Finished difference Result 797 states and 2257 transitions. [2021-06-05 04:46:36,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:46:36,817 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:46:36,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:36,818 INFO L225 Difference]: With dead ends: 797 [2021-06-05 04:46:36,818 INFO L226 Difference]: Without dead ends: 787 [2021-06-05 04:46:36,818 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 391.4ms TimeCoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:46:36,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 787 states. [2021-06-05 04:46:36,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 787 to 369. [2021-06-05 04:46:36,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 368 states have (on average 3.005434782608696) internal successors, (1106), 368 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:36,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 1106 transitions. [2021-06-05 04:46:36,823 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 1106 transitions. Word has length 22 [2021-06-05 04:46:36,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:36,824 INFO L482 AbstractCegarLoop]: Abstraction has 369 states and 1106 transitions. [2021-06-05 04:46:36,824 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:36,824 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 1106 transitions. [2021-06-05 04:46:36,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:46:36,824 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:36,824 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:37,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1103 [2021-06-05 04:46:37,025 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:37,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:37,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1113107642, now seen corresponding path program 97 times [2021-06-05 04:46:37,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:37,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285169697] [2021-06-05 04:46:37,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:37,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:37,099 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:37,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:37,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285169697] [2021-06-05 04:46:37,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285169697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:37,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468001436] [2021-06-05 04:46:37,099 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:37,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:37,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:46:37,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:37,295 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:37,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468001436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:37,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:37,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 04:46:37,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313878348] [2021-06-05 04:46:37,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:46:37,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:37,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:46:37,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:46:37,296 INFO L87 Difference]: Start difference. First operand 369 states and 1106 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:37,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:37,674 INFO L93 Difference]: Finished difference Result 711 states and 2049 transitions. [2021-06-05 04:46:37,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:46:37,675 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:46:37,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:37,676 INFO L225 Difference]: With dead ends: 711 [2021-06-05 04:46:37,676 INFO L226 Difference]: Without dead ends: 699 [2021-06-05 04:46:37,676 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 323.9ms TimeCoverageRelationStatistics Valid=130, Invalid=376, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:46:37,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2021-06-05 04:46:37,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 365. [2021-06-05 04:46:37,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 364 states have (on average 3.0054945054945055) internal successors, (1094), 364 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:37,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 1094 transitions. [2021-06-05 04:46:37,681 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 1094 transitions. Word has length 22 [2021-06-05 04:46:37,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:37,681 INFO L482 AbstractCegarLoop]: Abstraction has 365 states and 1094 transitions. [2021-06-05 04:46:37,681 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:37,681 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 1094 transitions. [2021-06-05 04:46:37,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:46:37,681 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:37,681 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:37,882 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1114,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:37,882 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:37,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:37,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1304772384, now seen corresponding path program 98 times [2021-06-05 04:46:37,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:37,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973706588] [2021-06-05 04:46:37,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:37,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:37,951 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:37,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:37,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973706588] [2021-06-05 04:46:37,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973706588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:37,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865215048] [2021-06-05 04:46:37,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:38,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:46:38,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:38,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:46:38,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:38,206 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:38,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865215048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:38,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:38,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:46:38,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928966253] [2021-06-05 04:46:38,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:46:38,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:38,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:46:38,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:46:38,206 INFO L87 Difference]: Start difference. First operand 365 states and 1094 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:38,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:38,648 INFO L93 Difference]: Finished difference Result 689 states and 2001 transitions. [2021-06-05 04:46:38,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:46:38,649 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:46:38,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:38,650 INFO L225 Difference]: With dead ends: 689 [2021-06-05 04:46:38,650 INFO L226 Difference]: Without dead ends: 689 [2021-06-05 04:46:38,650 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 424.7ms TimeCoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:46:38,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states. [2021-06-05 04:46:38,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 370. [2021-06-05 04:46:38,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 3.0) internal successors, (1107), 369 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:38,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 1107 transitions. [2021-06-05 04:46:38,654 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 1107 transitions. Word has length 22 [2021-06-05 04:46:38,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:38,655 INFO L482 AbstractCegarLoop]: Abstraction has 370 states and 1107 transitions. [2021-06-05 04:46:38,655 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:38,655 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 1107 transitions. [2021-06-05 04:46:38,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:46:38,655 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:38,655 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:38,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1123 [2021-06-05 04:46:38,856 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:38,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:38,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1495591948, now seen corresponding path program 99 times [2021-06-05 04:46:38,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:38,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342930773] [2021-06-05 04:46:38,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:38,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:38,924 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:38,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:38,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342930773] [2021-06-05 04:46:38,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342930773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:38,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492299552] [2021-06-05 04:46:38,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:38,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:46:38,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:38,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:46:38,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:39,135 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:39,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492299552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:39,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:39,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:46:39,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512451658] [2021-06-05 04:46:39,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:46:39,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:39,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:46:39,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:46:39,135 INFO L87 Difference]: Start difference. First operand 370 states and 1107 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:39,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:39,469 INFO L93 Difference]: Finished difference Result 680 states and 1981 transitions. [2021-06-05 04:46:39,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:46:39,470 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:46:39,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:39,471 INFO L225 Difference]: With dead ends: 680 [2021-06-05 04:46:39,471 INFO L226 Difference]: Without dead ends: 670 [2021-06-05 04:46:39,471 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 317.8ms TimeCoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:46:39,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2021-06-05 04:46:39,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 349. [2021-06-05 04:46:39,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 2.971264367816092) internal successors, (1034), 348 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:39,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1034 transitions. [2021-06-05 04:46:39,486 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1034 transitions. Word has length 22 [2021-06-05 04:46:39,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:39,486 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 1034 transitions. [2021-06-05 04:46:39,486 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:39,486 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1034 transitions. [2021-06-05 04:46:39,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:46:39,487 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:39,487 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:39,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1131,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:39,687 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:39,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:39,688 INFO L82 PathProgramCache]: Analyzing trace with hash -2041925648, now seen corresponding path program 100 times [2021-06-05 04:46:39,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:39,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599404721] [2021-06-05 04:46:39,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:39,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:39,762 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:39,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:39,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599404721] [2021-06-05 04:46:39,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599404721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:39,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073091503] [2021-06-05 04:46:39,763 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:39,823 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:46:39,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:39,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:46:39,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:39,969 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:39,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073091503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:39,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:39,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:46:39,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964515710] [2021-06-05 04:46:39,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:46:39,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:39,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:46:39,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:46:39,970 INFO L87 Difference]: Start difference. First operand 349 states and 1034 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:40,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:40,296 INFO L93 Difference]: Finished difference Result 594 states and 1754 transitions. [2021-06-05 04:46:40,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:46:40,296 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:46:40,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:40,297 INFO L225 Difference]: With dead ends: 594 [2021-06-05 04:46:40,297 INFO L226 Difference]: Without dead ends: 594 [2021-06-05 04:46:40,297 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 313.3ms TimeCoverageRelationStatistics Valid=138, Invalid=414, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:46:40,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-06-05 04:46:40,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 346. [2021-06-05 04:46:40,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 2.971014492753623) internal successors, (1025), 345 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:40,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 1025 transitions. [2021-06-05 04:46:40,302 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 1025 transitions. Word has length 22 [2021-06-05 04:46:40,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:40,302 INFO L482 AbstractCegarLoop]: Abstraction has 346 states and 1025 transitions. [2021-06-05 04:46:40,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:40,302 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 1025 transitions. [2021-06-05 04:46:40,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:46:40,303 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:40,303 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:40,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1141,102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:40,505 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:40,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:40,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1317993700, now seen corresponding path program 101 times [2021-06-05 04:46:40,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:40,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992519244] [2021-06-05 04:46:40,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:40,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:40,573 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:40,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:40,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992519244] [2021-06-05 04:46:40,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992519244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:40,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113537699] [2021-06-05 04:46:40,574 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:40,634 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:46:40,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:40,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:46:40,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:40,773 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:40,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113537699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:40,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:40,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:46:40,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929159698] [2021-06-05 04:46:40,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:46:40,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:40,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:46:40,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:46:40,774 INFO L87 Difference]: Start difference. First operand 346 states and 1025 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:41,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:41,233 INFO L93 Difference]: Finished difference Result 655 states and 1884 transitions. [2021-06-05 04:46:41,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:46:41,234 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:46:41,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:41,235 INFO L225 Difference]: With dead ends: 655 [2021-06-05 04:46:41,235 INFO L226 Difference]: Without dead ends: 655 [2021-06-05 04:46:41,235 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 407.5ms TimeCoverageRelationStatistics Valid=172, Invalid=478, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:46:41,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2021-06-05 04:46:41,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 354. [2021-06-05 04:46:41,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 2.9830028328611897) internal successors, (1053), 353 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:41,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 1053 transitions. [2021-06-05 04:46:41,239 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 1053 transitions. Word has length 22 [2021-06-05 04:46:41,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:41,239 INFO L482 AbstractCegarLoop]: Abstraction has 354 states and 1053 transitions. [2021-06-05 04:46:41,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:41,239 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 1053 transitions. [2021-06-05 04:46:41,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:46:41,240 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:41,240 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:41,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1148,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:41,440 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:41,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:41,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1464954152, now seen corresponding path program 102 times [2021-06-05 04:46:41,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:41,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491759734] [2021-06-05 04:46:41,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:41,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:41,517 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:41,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:41,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491759734] [2021-06-05 04:46:41,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491759734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:41,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670789438] [2021-06-05 04:46:41,517 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:41,577 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:46:41,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:41,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:46:41,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:41,708 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:41,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670789438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:41,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:41,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:46:41,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679820021] [2021-06-05 04:46:41,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:46:41,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:41,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:46:41,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:46:41,709 INFO L87 Difference]: Start difference. First operand 354 states and 1053 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:42,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:42,037 INFO L93 Difference]: Finished difference Result 622 states and 1795 transitions. [2021-06-05 04:46:42,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:46:42,037 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:46:42,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:42,038 INFO L225 Difference]: With dead ends: 622 [2021-06-05 04:46:42,038 INFO L226 Difference]: Without dead ends: 613 [2021-06-05 04:46:42,038 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 304.5ms TimeCoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:46:42,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-06-05 04:46:42,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 354. [2021-06-05 04:46:42,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 2.954674220963173) internal successors, (1043), 353 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:42,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 1043 transitions. [2021-06-05 04:46:42,044 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 1043 transitions. Word has length 22 [2021-06-05 04:46:42,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:42,044 INFO L482 AbstractCegarLoop]: Abstraction has 354 states and 1043 transitions. [2021-06-05 04:46:42,044 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:42,045 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 1043 transitions. [2021-06-05 04:46:42,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:46:42,045 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:42,045 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:42,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1155 [2021-06-05 04:46:42,261 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:42,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:42,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1287030692, now seen corresponding path program 103 times [2021-06-05 04:46:42,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:42,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672075374] [2021-06-05 04:46:42,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:42,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:42,337 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:42,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:42,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672075374] [2021-06-05 04:46:42,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672075374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:42,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490027975] [2021-06-05 04:46:42,337 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:42,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:42,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:46:42,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:42,544 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:42,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490027975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:42,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:42,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:46:42,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975601751] [2021-06-05 04:46:42,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:46:42,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:42,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:46:42,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:46:42,544 INFO L87 Difference]: Start difference. First operand 354 states and 1043 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:42,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:42,873 INFO L93 Difference]: Finished difference Result 565 states and 1664 transitions. [2021-06-05 04:46:42,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:46:42,873 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:46:42,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:42,874 INFO L225 Difference]: With dead ends: 565 [2021-06-05 04:46:42,874 INFO L226 Difference]: Without dead ends: 565 [2021-06-05 04:46:42,874 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 319.5ms TimeCoverageRelationStatistics Valid=138, Invalid=414, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:46:42,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-06-05 04:46:42,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 324. [2021-06-05 04:46:42,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.9473684210526314) internal successors, (952), 323 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:42,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 952 transitions. [2021-06-05 04:46:42,878 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 952 transitions. Word has length 22 [2021-06-05 04:46:42,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:42,878 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 952 transitions. [2021-06-05 04:46:42,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:42,878 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 952 transitions. [2021-06-05 04:46:42,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:46:42,879 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:42,879 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:43,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1163,105 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:43,085 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:43,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:43,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1437395562, now seen corresponding path program 104 times [2021-06-05 04:46:43,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:43,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369214715] [2021-06-05 04:46:43,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:43,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:43,150 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:43,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:43,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369214715] [2021-06-05 04:46:43,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369214715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:43,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094209795] [2021-06-05 04:46:43,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:43,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:46:43,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:43,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:46:43,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:43,358 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:43,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094209795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:43,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:43,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:46:43,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835160601] [2021-06-05 04:46:43,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:46:43,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:43,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:46:43,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:46:43,359 INFO L87 Difference]: Start difference. First operand 324 states and 952 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:43,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:43,607 INFO L93 Difference]: Finished difference Result 489 states and 1425 transitions. [2021-06-05 04:46:43,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:46:43,607 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:46:43,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:43,608 INFO L225 Difference]: With dead ends: 489 [2021-06-05 04:46:43,608 INFO L226 Difference]: Without dead ends: 489 [2021-06-05 04:46:43,608 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 266.9ms TimeCoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:46:43,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-06-05 04:46:43,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 334. [2021-06-05 04:46:43,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 2.978978978978979) internal successors, (992), 333 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:43,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 992 transitions. [2021-06-05 04:46:43,612 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 992 transitions. Word has length 22 [2021-06-05 04:46:43,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:43,612 INFO L482 AbstractCegarLoop]: Abstraction has 334 states and 992 transitions. [2021-06-05 04:46:43,612 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:43,612 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 992 transitions. [2021-06-05 04:46:43,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:46:43,613 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:43,613 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:43,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1170,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:43,813 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:43,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:43,813 INFO L82 PathProgramCache]: Analyzing trace with hash 57207402, now seen corresponding path program 105 times [2021-06-05 04:46:43,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:43,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325137330] [2021-06-05 04:46:43,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:43,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:43,885 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:43,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:43,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325137330] [2021-06-05 04:46:43,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325137330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:43,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995363237] [2021-06-05 04:46:43,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:43,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:46:43,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:43,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:46:43,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:44,139 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:44,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995363237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:44,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:44,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:46:44,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658660297] [2021-06-05 04:46:44,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:46:44,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:44,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:46:44,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:46:44,140 INFO L87 Difference]: Start difference. First operand 334 states and 992 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:44,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:44,493 INFO L93 Difference]: Finished difference Result 516 states and 1492 transitions. [2021-06-05 04:46:44,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:46:44,494 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:46:44,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:44,494 INFO L225 Difference]: With dead ends: 516 [2021-06-05 04:46:44,495 INFO L226 Difference]: Without dead ends: 506 [2021-06-05 04:46:44,495 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 334.8ms TimeCoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:46:44,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-06-05 04:46:44,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 331. [2021-06-05 04:46:44,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 2.9696969696969697) internal successors, (980), 330 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:44,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 980 transitions. [2021-06-05 04:46:44,498 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 980 transitions. Word has length 22 [2021-06-05 04:46:44,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:44,499 INFO L482 AbstractCegarLoop]: Abstraction has 331 states and 980 transitions. [2021-06-05 04:46:44,499 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:44,499 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 980 transitions. [2021-06-05 04:46:44,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:46:44,499 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:44,499 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:44,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1180,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:44,700 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:44,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:44,700 INFO L82 PathProgramCache]: Analyzing trace with hash 482154612, now seen corresponding path program 106 times [2021-06-05 04:46:44,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:44,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20631838] [2021-06-05 04:46:44,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:44,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:44,758 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:44,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:44,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20631838] [2021-06-05 04:46:44,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20631838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:44,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613633175] [2021-06-05 04:46:44,759 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:44,824 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:46:44,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:44,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:46:44,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:45,032 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:45,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613633175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:45,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:45,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:46:45,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196586239] [2021-06-05 04:46:45,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:46:45,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:45,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:46:45,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:46:45,033 INFO L87 Difference]: Start difference. First operand 331 states and 980 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:45,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:45,306 INFO L93 Difference]: Finished difference Result 477 states and 1390 transitions. [2021-06-05 04:46:45,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:46:45,307 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:46:45,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:45,307 INFO L225 Difference]: With dead ends: 477 [2021-06-05 04:46:45,307 INFO L226 Difference]: Without dead ends: 457 [2021-06-05 04:46:45,308 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 340.8ms TimeCoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:46:45,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-06-05 04:46:45,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 328. [2021-06-05 04:46:45,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.9602446483180427) internal successors, (968), 327 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:45,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 968 transitions. [2021-06-05 04:46:45,311 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 968 transitions. Word has length 22 [2021-06-05 04:46:45,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:45,311 INFO L482 AbstractCegarLoop]: Abstraction has 328 states and 968 transitions. [2021-06-05 04:46:45,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:45,311 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 968 transitions. [2021-06-05 04:46:45,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:46:45,312 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:45,312 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:45,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1193,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:45,512 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:45,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:45,512 INFO L82 PathProgramCache]: Analyzing trace with hash -332526258, now seen corresponding path program 107 times [2021-06-05 04:46:45,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:45,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253797655] [2021-06-05 04:46:45,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:45,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:45,580 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:45,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:45,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253797655] [2021-06-05 04:46:45,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253797655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:45,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472744716] [2021-06-05 04:46:45,580 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:45,641 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:46:45,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:45,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:46:45,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:45,774 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:45,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472744716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:45,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:45,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:46:45,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911391112] [2021-06-05 04:46:45,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:46:45,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:45,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:46:45,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:46:45,775 INFO L87 Difference]: Start difference. First operand 328 states and 968 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:46,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:46,123 INFO L93 Difference]: Finished difference Result 607 states and 1761 transitions. [2021-06-05 04:46:46,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:46:46,124 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:46:46,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:46,125 INFO L225 Difference]: With dead ends: 607 [2021-06-05 04:46:46,125 INFO L226 Difference]: Without dead ends: 607 [2021-06-05 04:46:46,125 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 297.7ms TimeCoverageRelationStatistics Valid=148, Invalid=404, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:46:46,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-06-05 04:46:46,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 338. [2021-06-05 04:46:46,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 3.0118694362017804) internal successors, (1015), 337 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:46,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1015 transitions. [2021-06-05 04:46:46,129 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1015 transitions. Word has length 22 [2021-06-05 04:46:46,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:46,129 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 1015 transitions. [2021-06-05 04:46:46,129 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:46,129 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1015 transitions. [2021-06-05 04:46:46,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:46:46,129 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:46,129 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:46,330 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1201,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:46,330 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:46,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:46,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1162076706, now seen corresponding path program 108 times [2021-06-05 04:46:46,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:46,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112580088] [2021-06-05 04:46:46,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:46,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:46,403 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:46,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:46,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112580088] [2021-06-05 04:46:46,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112580088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:46,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935302565] [2021-06-05 04:46:46,404 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:46,470 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:46:46,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:46,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:46:46,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:46,635 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:46,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935302565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:46,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:46,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:46:46,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810290926] [2021-06-05 04:46:46,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:46:46,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:46,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:46:46,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:46:46,636 INFO L87 Difference]: Start difference. First operand 338 states and 1015 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:47,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:47,099 INFO L93 Difference]: Finished difference Result 651 states and 1869 transitions. [2021-06-05 04:46:47,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:46:47,099 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:46:47,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:47,100 INFO L225 Difference]: With dead ends: 651 [2021-06-05 04:46:47,100 INFO L226 Difference]: Without dead ends: 641 [2021-06-05 04:46:47,100 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 408.8ms TimeCoverageRelationStatistics Valid=155, Invalid=495, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:46:47,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2021-06-05 04:46:47,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 345. [2021-06-05 04:46:47,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 2.991279069767442) internal successors, (1029), 344 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:47,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1029 transitions. [2021-06-05 04:46:47,104 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1029 transitions. Word has length 22 [2021-06-05 04:46:47,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:47,104 INFO L482 AbstractCegarLoop]: Abstraction has 345 states and 1029 transitions. [2021-06-05 04:46:47,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:47,104 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1029 transitions. [2021-06-05 04:46:47,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:46:47,105 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:47,105 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:47,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1210 [2021-06-05 04:46:47,305 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:47,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:47,306 INFO L82 PathProgramCache]: Analyzing trace with hash -1682358634, now seen corresponding path program 109 times [2021-06-05 04:46:47,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:47,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240272884] [2021-06-05 04:46:47,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:47,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:47,372 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:47,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:47,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240272884] [2021-06-05 04:46:47,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240272884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:47,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353687359] [2021-06-05 04:46:47,372 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:47,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:47,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:46:47,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:47,593 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:47,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353687359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:47,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:47,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:46:47,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807395327] [2021-06-05 04:46:47,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:46:47,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:47,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:46:47,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:46:47,594 INFO L87 Difference]: Start difference. First operand 345 states and 1029 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:47,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:47,826 INFO L93 Difference]: Finished difference Result 540 states and 1570 transitions. [2021-06-05 04:46:47,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:46:47,826 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:46:47,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:47,827 INFO L225 Difference]: With dead ends: 540 [2021-06-05 04:46:47,827 INFO L226 Difference]: Without dead ends: 540 [2021-06-05 04:46:47,827 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 253.1ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:46:47,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-06-05 04:46:47,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 336. [2021-06-05 04:46:47,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 2.997014925373134) internal successors, (1004), 335 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:47,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1004 transitions. [2021-06-05 04:46:47,831 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1004 transitions. Word has length 22 [2021-06-05 04:46:47,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:47,831 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 1004 transitions. [2021-06-05 04:46:47,831 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:47,831 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1004 transitions. [2021-06-05 04:46:47,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:46:47,831 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:47,831 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:48,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1221 [2021-06-05 04:46:48,032 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:48,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:48,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1100589218, now seen corresponding path program 110 times [2021-06-05 04:46:48,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:48,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435890640] [2021-06-05 04:46:48,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:48,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:48,109 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:48,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:48,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435890640] [2021-06-05 04:46:48,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435890640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:48,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036930790] [2021-06-05 04:46:48,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:48,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:46:48,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:48,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:46:48,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:48,328 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:48,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036930790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:48,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:48,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:46:48,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214903004] [2021-06-05 04:46:48,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:46:48,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:48,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:46:48,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:46:48,329 INFO L87 Difference]: Start difference. First operand 336 states and 1004 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:48,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:48,558 INFO L93 Difference]: Finished difference Result 556 states and 1597 transitions. [2021-06-05 04:46:48,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:46:48,558 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:46:48,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:48,559 INFO L225 Difference]: With dead ends: 556 [2021-06-05 04:46:48,559 INFO L226 Difference]: Without dead ends: 547 [2021-06-05 04:46:48,559 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 264.7ms TimeCoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:46:48,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2021-06-05 04:46:48,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 342. [2021-06-05 04:46:48,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 2.9794721407624634) internal successors, (1016), 341 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:48,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1016 transitions. [2021-06-05 04:46:48,563 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1016 transitions. Word has length 22 [2021-06-05 04:46:48,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:48,563 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 1016 transitions. [2021-06-05 04:46:48,563 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:48,563 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1016 transitions. [2021-06-05 04:46:48,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:46:48,564 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:48,564 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:48,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1234 [2021-06-05 04:46:48,766 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:48,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:48,766 INFO L82 PathProgramCache]: Analyzing trace with hash 878028852, now seen corresponding path program 111 times [2021-06-05 04:46:48,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:48,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000811791] [2021-06-05 04:46:48,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:48,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:48,835 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:48,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:48,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000811791] [2021-06-05 04:46:48,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000811791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:48,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100820843] [2021-06-05 04:46:48,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:48,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:46:48,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:48,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:46:48,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:49,039 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:49,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100820843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:49,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:49,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 04:46:49,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004942714] [2021-06-05 04:46:49,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:46:49,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:49,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:46:49,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:46:49,041 INFO L87 Difference]: Start difference. First operand 342 states and 1016 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:49,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:49,572 INFO L93 Difference]: Finished difference Result 616 states and 1742 transitions. [2021-06-05 04:46:49,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:46:49,573 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:46:49,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:49,574 INFO L225 Difference]: With dead ends: 616 [2021-06-05 04:46:49,574 INFO L226 Difference]: Without dead ends: 606 [2021-06-05 04:46:49,574 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 433.5ms TimeCoverageRelationStatistics Valid=131, Invalid=421, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:46:49,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2021-06-05 04:46:49,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 364. [2021-06-05 04:46:49,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 363 states have (on average 2.975206611570248) internal successors, (1080), 363 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:49,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 1080 transitions. [2021-06-05 04:46:49,579 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 1080 transitions. Word has length 22 [2021-06-05 04:46:49,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:49,579 INFO L482 AbstractCegarLoop]: Abstraction has 364 states and 1080 transitions. [2021-06-05 04:46:49,579 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:49,579 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 1080 transitions. [2021-06-05 04:46:49,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:46:49,580 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:49,580 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:49,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1246 [2021-06-05 04:46:49,784 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:49,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:49,784 INFO L82 PathProgramCache]: Analyzing trace with hash 695938540, now seen corresponding path program 112 times [2021-06-05 04:46:49,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:49,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856722106] [2021-06-05 04:46:49,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:49,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:49,860 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:49,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:49,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856722106] [2021-06-05 04:46:49,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856722106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:49,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997807015] [2021-06-05 04:46:49,860 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:49,923 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:46:49,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:49,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:46:49,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:50,068 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:50,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997807015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:50,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:50,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 04:46:50,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577927220] [2021-06-05 04:46:50,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:46:50,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:50,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:46:50,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:46:50,069 INFO L87 Difference]: Start difference. First operand 364 states and 1080 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:50,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:50,429 INFO L93 Difference]: Finished difference Result 606 states and 1703 transitions. [2021-06-05 04:46:50,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:46:50,429 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:46:50,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:50,430 INFO L225 Difference]: With dead ends: 606 [2021-06-05 04:46:50,430 INFO L226 Difference]: Without dead ends: 594 [2021-06-05 04:46:50,430 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 362.0ms TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:46:50,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-06-05 04:46:50,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 344. [2021-06-05 04:46:50,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 2.9737609329446064) internal successors, (1020), 343 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:50,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1020 transitions. [2021-06-05 04:46:50,435 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1020 transitions. Word has length 22 [2021-06-05 04:46:50,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:50,435 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 1020 transitions. [2021-06-05 04:46:50,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:50,435 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1020 transitions. [2021-06-05 04:46:50,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:46:50,435 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:50,435 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:50,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1257 [2021-06-05 04:46:50,636 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:50,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:50,636 INFO L82 PathProgramCache]: Analyzing trace with hash 266605730, now seen corresponding path program 113 times [2021-06-05 04:46:50,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:50,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233798208] [2021-06-05 04:46:50,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:50,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:50,692 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:50,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:50,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233798208] [2021-06-05 04:46:50,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233798208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:50,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187920414] [2021-06-05 04:46:50,692 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:50,755 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:46:50,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:50,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:46:50,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:50,922 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:50,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187920414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:50,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:50,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:46:50,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002079177] [2021-06-05 04:46:50,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:46:50,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:50,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:46:50,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:46:50,922 INFO L87 Difference]: Start difference. First operand 344 states and 1020 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:51,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:51,275 INFO L93 Difference]: Finished difference Result 474 states and 1386 transitions. [2021-06-05 04:46:51,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:46:51,275 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:46:51,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:51,276 INFO L225 Difference]: With dead ends: 474 [2021-06-05 04:46:51,276 INFO L226 Difference]: Without dead ends: 454 [2021-06-05 04:46:51,276 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 350.2ms TimeCoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:46:51,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-06-05 04:46:51,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 350. [2021-06-05 04:46:51,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 2.9598853868194843) internal successors, (1033), 349 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:51,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1033 transitions. [2021-06-05 04:46:51,280 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1033 transitions. Word has length 22 [2021-06-05 04:46:51,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:51,280 INFO L482 AbstractCegarLoop]: Abstraction has 350 states and 1033 transitions. [2021-06-05 04:46:51,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:51,280 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1033 transitions. [2021-06-05 04:46:51,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:46:51,280 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:51,280 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:51,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1271,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:51,481 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:51,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:51,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1083226646, now seen corresponding path program 114 times [2021-06-05 04:46:51,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:51,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35408621] [2021-06-05 04:46:51,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:51,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:51,551 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:51,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:51,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35408621] [2021-06-05 04:46:51,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35408621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:51,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162196995] [2021-06-05 04:46:51,551 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:51,614 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:46:51,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:51,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:46:51,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:51,743 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:51,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162196995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:51,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:51,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 04:46:51,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672725723] [2021-06-05 04:46:51,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:46:51,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:51,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:46:51,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:46:51,744 INFO L87 Difference]: Start difference. First operand 350 states and 1033 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:52,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:52,079 INFO L93 Difference]: Finished difference Result 552 states and 1564 transitions. [2021-06-05 04:46:52,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:46:52,079 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:46:52,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:52,080 INFO L225 Difference]: With dead ends: 552 [2021-06-05 04:46:52,080 INFO L226 Difference]: Without dead ends: 542 [2021-06-05 04:46:52,080 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 304.2ms TimeCoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:46:52,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-06-05 04:46:52,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 372. [2021-06-05 04:46:52,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 371 states have (on average 2.9568733153638815) internal successors, (1097), 371 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:52,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 1097 transitions. [2021-06-05 04:46:52,084 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 1097 transitions. Word has length 22 [2021-06-05 04:46:52,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:52,085 INFO L482 AbstractCegarLoop]: Abstraction has 372 states and 1097 transitions. [2021-06-05 04:46:52,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:52,085 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 1097 transitions. [2021-06-05 04:46:52,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:46:52,085 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:52,085 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:52,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1280 [2021-06-05 04:46:52,286 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:52,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:52,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1265316958, now seen corresponding path program 115 times [2021-06-05 04:46:52,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:52,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557740546] [2021-06-05 04:46:52,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:52,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:52,345 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:52,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:52,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557740546] [2021-06-05 04:46:52,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557740546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:52,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114827357] [2021-06-05 04:46:52,346 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:52,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:52,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:46:52,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:52,545 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:52,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114827357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:52,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:52,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 04:46:52,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701461419] [2021-06-05 04:46:52,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:46:52,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:52,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:46:52,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:46:52,546 INFO L87 Difference]: Start difference. First operand 372 states and 1097 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:52,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:52,848 INFO L93 Difference]: Finished difference Result 509 states and 1453 transitions. [2021-06-05 04:46:52,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:46:52,848 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:46:52,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:52,849 INFO L225 Difference]: With dead ends: 509 [2021-06-05 04:46:52,849 INFO L226 Difference]: Without dead ends: 494 [2021-06-05 04:46:52,849 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 249.0ms TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:46:52,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-06-05 04:46:52,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 346. [2021-06-05 04:46:52,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 2.9681159420289855) internal successors, (1024), 345 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:52,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 1024 transitions. [2021-06-05 04:46:52,853 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 1024 transitions. Word has length 22 [2021-06-05 04:46:52,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:52,853 INFO L482 AbstractCegarLoop]: Abstraction has 346 states and 1024 transitions. [2021-06-05 04:46:52,853 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:52,853 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 1024 transitions. [2021-06-05 04:46:52,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:46:52,853 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:52,853 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:53,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1291,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:53,054 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:53,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:53,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1974888418, now seen corresponding path program 116 times [2021-06-05 04:46:53,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:53,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888857689] [2021-06-05 04:46:53,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:53,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:53,122 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:53,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:53,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888857689] [2021-06-05 04:46:53,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888857689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:53,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241649742] [2021-06-05 04:46:53,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:53,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:46:53,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:53,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:46:53,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:53,305 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:53,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241649742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:53,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:53,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:46:53,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614963569] [2021-06-05 04:46:53,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:46:53,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:53,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:46:53,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:46:53,306 INFO L87 Difference]: Start difference. First operand 346 states and 1024 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:53,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:53,535 INFO L93 Difference]: Finished difference Result 472 states and 1360 transitions. [2021-06-05 04:46:53,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:46:53,535 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:46:53,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:53,535 INFO L225 Difference]: With dead ends: 472 [2021-06-05 04:46:53,536 INFO L226 Difference]: Without dead ends: 472 [2021-06-05 04:46:53,536 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 200.1ms TimeCoverageRelationStatistics Valid=115, Invalid=305, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:46:53,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-06-05 04:46:53,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 349. [2021-06-05 04:46:53,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 2.954022988505747) internal successors, (1028), 348 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:53,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1028 transitions. [2021-06-05 04:46:53,539 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1028 transitions. Word has length 22 [2021-06-05 04:46:53,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:53,539 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 1028 transitions. [2021-06-05 04:46:53,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:53,539 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1028 transitions. [2021-06-05 04:46:53,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:46:53,540 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:53,540 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:53,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1301 [2021-06-05 04:46:53,740 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:53,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:53,740 INFO L82 PathProgramCache]: Analyzing trace with hash -480285454, now seen corresponding path program 117 times [2021-06-05 04:46:53,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:53,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789900214] [2021-06-05 04:46:53,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:53,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:53,803 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:53,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:53,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789900214] [2021-06-05 04:46:53,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789900214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:53,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275063788] [2021-06-05 04:46:53,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:53,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:46:53,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:53,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:46:53,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:53,994 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:53,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275063788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:53,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:53,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:46:53,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402801864] [2021-06-05 04:46:53,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:46:53,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:53,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:46:53,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:46:53,995 INFO L87 Difference]: Start difference. First operand 349 states and 1028 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:54,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:54,285 INFO L93 Difference]: Finished difference Result 499 states and 1424 transitions. [2021-06-05 04:46:54,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:46:54,286 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:46:54,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:54,286 INFO L225 Difference]: With dead ends: 499 [2021-06-05 04:46:54,286 INFO L226 Difference]: Without dead ends: 489 [2021-06-05 04:46:54,286 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 259.2ms TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:46:54,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-06-05 04:46:54,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 346. [2021-06-05 04:46:54,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 2.944927536231884) internal successors, (1016), 345 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:54,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 1016 transitions. [2021-06-05 04:46:54,290 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 1016 transitions. Word has length 22 [2021-06-05 04:46:54,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:54,290 INFO L482 AbstractCegarLoop]: Abstraction has 346 states and 1016 transitions. [2021-06-05 04:46:54,290 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:54,290 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 1016 transitions. [2021-06-05 04:46:54,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:46:54,291 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:54,291 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:54,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1306 [2021-06-05 04:46:54,491 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:54,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:54,491 INFO L82 PathProgramCache]: Analyzing trace with hash -55338244, now seen corresponding path program 118 times [2021-06-05 04:46:54,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:54,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537222147] [2021-06-05 04:46:54,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:54,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:54,549 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:54,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:54,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537222147] [2021-06-05 04:46:54,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537222147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:54,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611525160] [2021-06-05 04:46:54,549 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:54,613 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:46:54,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:54,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:46:54,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:54,751 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:54,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611525160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:54,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:54,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:46:54,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315629201] [2021-06-05 04:46:54,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:46:54,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:54,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:46:54,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:46:54,752 INFO L87 Difference]: Start difference. First operand 346 states and 1016 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:54,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:54,987 INFO L93 Difference]: Finished difference Result 450 states and 1308 transitions. [2021-06-05 04:46:54,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:46:54,988 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:46:54,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:54,988 INFO L225 Difference]: With dead ends: 450 [2021-06-05 04:46:54,988 INFO L226 Difference]: Without dead ends: 430 [2021-06-05 04:46:54,989 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 216.8ms TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:46:54,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-06-05 04:46:54,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 328. [2021-06-05 04:46:54,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.948012232415902) internal successors, (964), 327 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:54,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 964 transitions. [2021-06-05 04:46:54,992 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 964 transitions. Word has length 22 [2021-06-05 04:46:54,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:54,992 INFO L482 AbstractCegarLoop]: Abstraction has 328 states and 964 transitions. [2021-06-05 04:46:54,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:54,992 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 964 transitions. [2021-06-05 04:46:54,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:46:54,992 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:54,992 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:55,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1312 [2021-06-05 04:46:55,193 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:55,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:55,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1651654990, now seen corresponding path program 119 times [2021-06-05 04:46:55,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:55,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686487716] [2021-06-05 04:46:55,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:55,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:55,261 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:55,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:55,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686487716] [2021-06-05 04:46:55,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686487716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:55,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333899953] [2021-06-05 04:46:55,267 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:55,341 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:46:55,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:55,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:46:55,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:55,459 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:55,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333899953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:55,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:55,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:46:55,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272582399] [2021-06-05 04:46:55,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:46:55,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:55,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:46:55,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:46:55,460 INFO L87 Difference]: Start difference. First operand 328 states and 964 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:55,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:55,728 INFO L93 Difference]: Finished difference Result 531 states and 1544 transitions. [2021-06-05 04:46:55,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:46:55,729 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:46:55,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:55,729 INFO L225 Difference]: With dead ends: 531 [2021-06-05 04:46:55,729 INFO L226 Difference]: Without dead ends: 531 [2021-06-05 04:46:55,729 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 249.0ms TimeCoverageRelationStatistics Valid=137, Invalid=369, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:46:55,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-06-05 04:46:55,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 340. [2021-06-05 04:46:55,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 2.9852507374631267) internal successors, (1012), 339 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:55,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1012 transitions. [2021-06-05 04:46:55,733 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1012 transitions. Word has length 22 [2021-06-05 04:46:55,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:55,733 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1012 transitions. [2021-06-05 04:46:55,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:55,733 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1012 transitions. [2021-06-05 04:46:55,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:46:55,734 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:55,734 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:55,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1316,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:55,934 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:55,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:55,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1148709342, now seen corresponding path program 120 times [2021-06-05 04:46:55,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:55,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636955677] [2021-06-05 04:46:55,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:55,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:56,019 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:56,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:56,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636955677] [2021-06-05 04:46:56,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636955677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:56,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801538983] [2021-06-05 04:46:56,019 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:56,108 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:46:56,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:56,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:46:56,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:56,228 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:56,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801538983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:56,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:56,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:46:56,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006251928] [2021-06-05 04:46:56,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:46:56,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:56,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:46:56,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:46:56,229 INFO L87 Difference]: Start difference. First operand 340 states and 1012 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:56,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:56,502 INFO L93 Difference]: Finished difference Result 503 states and 1458 transitions. [2021-06-05 04:46:56,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:46:56,503 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:46:56,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:56,503 INFO L225 Difference]: With dead ends: 503 [2021-06-05 04:46:56,503 INFO L226 Difference]: Without dead ends: 493 [2021-06-05 04:46:56,504 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 258.3ms TimeCoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:46:56,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-06-05 04:46:56,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 347. [2021-06-05 04:46:56,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 2.9653179190751446) internal successors, (1026), 346 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:56,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1026 transitions. [2021-06-05 04:46:56,507 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1026 transitions. Word has length 22 [2021-06-05 04:46:56,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:56,507 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 1026 transitions. [2021-06-05 04:46:56,507 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:56,507 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1026 transitions. [2021-06-05 04:46:56,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:46:56,508 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:56,508 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:56,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1322 [2021-06-05 04:46:56,708 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:56,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:56,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1467821662, now seen corresponding path program 121 times [2021-06-05 04:46:56,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:56,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142068693] [2021-06-05 04:46:56,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:56,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:56,793 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:56,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:56,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142068693] [2021-06-05 04:46:56,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142068693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:56,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817246740] [2021-06-05 04:46:56,793 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:56,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:56,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:46:56,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:57,022 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:57,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817246740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:57,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:57,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:46:57,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137444455] [2021-06-05 04:46:57,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:46:57,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:57,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:46:57,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:46:57,024 INFO L87 Difference]: Start difference. First operand 347 states and 1026 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:57,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:57,273 INFO L93 Difference]: Finished difference Result 431 states and 1272 transitions. [2021-06-05 04:46:57,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:46:57,274 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:46:57,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:57,274 INFO L225 Difference]: With dead ends: 431 [2021-06-05 04:46:57,274 INFO L226 Difference]: Without dead ends: 431 [2021-06-05 04:46:57,275 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 239.2ms TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:46:57,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-06-05 04:46:57,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 325. [2021-06-05 04:46:57,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.947530864197531) internal successors, (955), 324 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:57,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 955 transitions. [2021-06-05 04:46:57,279 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 955 transitions. Word has length 22 [2021-06-05 04:46:57,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:57,279 INFO L482 AbstractCegarLoop]: Abstraction has 325 states and 955 transitions. [2021-06-05 04:46:57,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:57,280 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 955 transitions. [2021-06-05 04:46:57,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:46:57,280 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:57,280 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:57,503 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1327,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:57,503 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:57,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:57,503 INFO L82 PathProgramCache]: Analyzing trace with hash -1676258398, now seen corresponding path program 122 times [2021-06-05 04:46:57,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:57,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031083051] [2021-06-05 04:46:57,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:57,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:57,574 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:57,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:57,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031083051] [2021-06-05 04:46:57,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031083051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:57,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509299434] [2021-06-05 04:46:57,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:57,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:46:57,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:57,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:46:57,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:57,788 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:57,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509299434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:57,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:57,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:46:57,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602506376] [2021-06-05 04:46:57,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:46:57,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:57,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:46:57,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:46:57,788 INFO L87 Difference]: Start difference. First operand 325 states and 955 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:58,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:58,088 INFO L93 Difference]: Finished difference Result 688 states and 1965 transitions. [2021-06-05 04:46:58,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:46:58,089 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:46:58,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:58,090 INFO L225 Difference]: With dead ends: 688 [2021-06-05 04:46:58,090 INFO L226 Difference]: Without dead ends: 688 [2021-06-05 04:46:58,090 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 307.5ms TimeCoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:46:58,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2021-06-05 04:46:58,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 339. [2021-06-05 04:46:58,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 3.0118343195266273) internal successors, (1018), 338 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:58,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1018 transitions. [2021-06-05 04:46:58,094 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1018 transitions. Word has length 22 [2021-06-05 04:46:58,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:58,094 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 1018 transitions. [2021-06-05 04:46:58,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:58,094 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1018 transitions. [2021-06-05 04:46:58,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:46:58,095 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:58,095 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:58,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1331 [2021-06-05 04:46:58,295 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:58,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:58,296 INFO L82 PathProgramCache]: Analyzing trace with hash -181655434, now seen corresponding path program 123 times [2021-06-05 04:46:58,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:58,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535168585] [2021-06-05 04:46:58,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:58,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:58,383 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:58,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:58,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535168585] [2021-06-05 04:46:58,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535168585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:58,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755917877] [2021-06-05 04:46:58,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:58,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:46:58,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:58,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:46:58,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:58,598 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:58,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755917877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:58,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:58,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:46:58,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590535135] [2021-06-05 04:46:58,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:46:58,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:58,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:46:58,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:46:58,598 INFO L87 Difference]: Start difference. First operand 339 states and 1018 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:58,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:58,827 INFO L93 Difference]: Finished difference Result 627 states and 1798 transitions. [2021-06-05 04:46:58,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:46:58,827 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:46:58,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:58,828 INFO L225 Difference]: With dead ends: 627 [2021-06-05 04:46:58,828 INFO L226 Difference]: Without dead ends: 617 [2021-06-05 04:46:58,829 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 258.6ms TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:46:58,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2021-06-05 04:46:58,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 346. [2021-06-05 04:46:58,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 2.991304347826087) internal successors, (1032), 345 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:58,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 1032 transitions. [2021-06-05 04:46:58,835 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 1032 transitions. Word has length 22 [2021-06-05 04:46:58,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:58,835 INFO L482 AbstractCegarLoop]: Abstraction has 346 states and 1032 transitions. [2021-06-05 04:46:58,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:58,835 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 1032 transitions. [2021-06-05 04:46:58,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:46:58,836 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:58,836 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:59,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1342 [2021-06-05 04:46:59,049 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:59,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:59,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1268876522, now seen corresponding path program 124 times [2021-06-05 04:46:59,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:59,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771220447] [2021-06-05 04:46:59,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:59,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:59,134 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:59,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:59,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771220447] [2021-06-05 04:46:59,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771220447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:59,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059523034] [2021-06-05 04:46:59,135 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:59,201 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:46:59,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:59,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:46:59,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:59,356 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:59,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059523034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:59,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:59,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:46:59,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792146733] [2021-06-05 04:46:59,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:46:59,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:59,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:46:59,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:46:59,357 INFO L87 Difference]: Start difference. First operand 346 states and 1032 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:59,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:59,603 INFO L93 Difference]: Finished difference Result 621 states and 1807 transitions. [2021-06-05 04:46:59,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:46:59,604 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:46:59,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:59,604 INFO L225 Difference]: With dead ends: 621 [2021-06-05 04:46:59,604 INFO L226 Difference]: Without dead ends: 621 [2021-06-05 04:46:59,604 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 228.5ms TimeCoverageRelationStatistics Valid=130, Invalid=332, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:46:59,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2021-06-05 04:46:59,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 352. [2021-06-05 04:46:59,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 3.017094017094017) internal successors, (1059), 351 states have internal predecessors, (1059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:59,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 1059 transitions. [2021-06-05 04:46:59,613 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 1059 transitions. Word has length 22 [2021-06-05 04:46:59,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:59,613 INFO L482 AbstractCegarLoop]: Abstraction has 352 states and 1059 transitions. [2021-06-05 04:46:59,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:46:59,613 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 1059 transitions. [2021-06-05 04:46:59,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:46:59,614 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:59,614 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:59,814 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1354 [2021-06-05 04:46:59,814 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:59,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:59,815 INFO L82 PathProgramCache]: Analyzing trace with hash -243142922, now seen corresponding path program 125 times [2021-06-05 04:46:59,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:59,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421825653] [2021-06-05 04:46:59,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:59,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:59,894 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:59,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:59,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421825653] [2021-06-05 04:46:59,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421825653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:59,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583472286] [2021-06-05 04:46:59,894 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:59,968 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:46:59,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:59,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:46:59,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:00,110 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:00,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583472286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:00,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:00,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:47:00,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318095119] [2021-06-05 04:47:00,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:47:00,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:00,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:47:00,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:47:00,111 INFO L87 Difference]: Start difference. First operand 352 states and 1059 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:00,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:00,375 INFO L93 Difference]: Finished difference Result 637 states and 1834 transitions. [2021-06-05 04:47:00,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:47:00,375 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:47:00,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:00,376 INFO L225 Difference]: With dead ends: 637 [2021-06-05 04:47:00,376 INFO L226 Difference]: Without dead ends: 628 [2021-06-05 04:47:00,376 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 267.9ms TimeCoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:47:00,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2021-06-05 04:47:00,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 358. [2021-06-05 04:47:00,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 3.0) internal successors, (1071), 357 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:00,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 1071 transitions. [2021-06-05 04:47:00,380 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 1071 transitions. Word has length 22 [2021-06-05 04:47:00,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:00,381 INFO L482 AbstractCegarLoop]: Abstraction has 358 states and 1071 transitions. [2021-06-05 04:47:00,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:00,381 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 1071 transitions. [2021-06-05 04:47:00,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:47:00,381 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:00,381 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:00,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1367 [2021-06-05 04:47:00,582 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:00,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:00,582 INFO L82 PathProgramCache]: Analyzing trace with hash -465703288, now seen corresponding path program 126 times [2021-06-05 04:47:00,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:00,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177545788] [2021-06-05 04:47:00,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:00,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:00,657 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:00,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:00,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177545788] [2021-06-05 04:47:00,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177545788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:00,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214607459] [2021-06-05 04:47:00,657 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:00,724 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:47:00,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:00,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:47:00,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:00,860 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:00,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214607459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:00,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:00,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 04:47:00,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623676624] [2021-06-05 04:47:00,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:47:00,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:00,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:47:00,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:47:00,860 INFO L87 Difference]: Start difference. First operand 358 states and 1071 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:01,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:01,130 INFO L93 Difference]: Finished difference Result 592 states and 1704 transitions. [2021-06-05 04:47:01,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:47:01,131 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:47:01,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:01,131 INFO L225 Difference]: With dead ends: 592 [2021-06-05 04:47:01,131 INFO L226 Difference]: Without dead ends: 582 [2021-06-05 04:47:01,132 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 269.9ms TimeCoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:47:01,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2021-06-05 04:47:01,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 370. [2021-06-05 04:47:01,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 3.005420054200542) internal successors, (1109), 369 states have internal predecessors, (1109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:01,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 1109 transitions. [2021-06-05 04:47:01,136 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 1109 transitions. Word has length 22 [2021-06-05 04:47:01,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:01,136 INFO L482 AbstractCegarLoop]: Abstraction has 370 states and 1109 transitions. [2021-06-05 04:47:01,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:01,136 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 1109 transitions. [2021-06-05 04:47:01,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:47:01,136 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:01,136 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:01,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1378 [2021-06-05 04:47:01,337 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:01,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:01,337 INFO L82 PathProgramCache]: Analyzing trace with hash -647793600, now seen corresponding path program 127 times [2021-06-05 04:47:01,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:01,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101350701] [2021-06-05 04:47:01,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:01,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:01,403 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:01,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:01,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101350701] [2021-06-05 04:47:01,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101350701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:01,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142490789] [2021-06-05 04:47:01,403 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:01,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:01,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:47:01,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:01,631 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:01,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142490789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:01,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:01,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 04:47:01,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844057126] [2021-06-05 04:47:01,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:47:01,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:01,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:47:01,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:47:01,632 INFO L87 Difference]: Start difference. First operand 370 states and 1109 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:01,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:01,883 INFO L93 Difference]: Finished difference Result 623 states and 1767 transitions. [2021-06-05 04:47:01,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:47:01,884 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:47:01,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:01,884 INFO L225 Difference]: With dead ends: 623 [2021-06-05 04:47:01,884 INFO L226 Difference]: Without dead ends: 611 [2021-06-05 04:47:01,884 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 254.5ms TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:47:01,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2021-06-05 04:47:01,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 366. [2021-06-05 04:47:01,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 3.0054794520547947) internal successors, (1097), 365 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:01,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 1097 transitions. [2021-06-05 04:47:01,889 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 1097 transitions. Word has length 22 [2021-06-05 04:47:01,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:01,889 INFO L482 AbstractCegarLoop]: Abstraction has 366 states and 1097 transitions. [2021-06-05 04:47:01,889 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:01,889 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 1097 transitions. [2021-06-05 04:47:01,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:47:01,890 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:01,890 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:02,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1391,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:02,112 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:02,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:02,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1770086426, now seen corresponding path program 128 times [2021-06-05 04:47:02,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:02,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487434334] [2021-06-05 04:47:02,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:02,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:02,184 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:02,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:02,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487434334] [2021-06-05 04:47:02,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487434334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:02,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505045104] [2021-06-05 04:47:02,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:02,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:47:02,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:02,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:47:02,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:02,406 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:02,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505045104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:02,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:02,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:47:02,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005812122] [2021-06-05 04:47:02,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:47:02,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:02,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:47:02,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:47:02,406 INFO L87 Difference]: Start difference. First operand 366 states and 1097 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:02,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:02,756 INFO L93 Difference]: Finished difference Result 571 states and 1657 transitions. [2021-06-05 04:47:02,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:47:02,756 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:47:02,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:02,757 INFO L225 Difference]: With dead ends: 571 [2021-06-05 04:47:02,757 INFO L226 Difference]: Without dead ends: 571 [2021-06-05 04:47:02,757 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 329.9ms TimeCoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:47:02,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-06-05 04:47:02,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 371. [2021-06-05 04:47:02,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 370 states have (on average 3.0) internal successors, (1110), 370 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:02,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 1110 transitions. [2021-06-05 04:47:02,761 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 1110 transitions. Word has length 22 [2021-06-05 04:47:02,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:02,761 INFO L482 AbstractCegarLoop]: Abstraction has 371 states and 1110 transitions. [2021-06-05 04:47:02,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:02,761 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 1110 transitions. [2021-06-05 04:47:02,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:47:02,761 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:02,762 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:02,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1400 [2021-06-05 04:47:02,962 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:02,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:02,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1030277906, now seen corresponding path program 129 times [2021-06-05 04:47:02,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:02,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128710017] [2021-06-05 04:47:02,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:02,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:03,031 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:03,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:03,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128710017] [2021-06-05 04:47:03,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128710017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:03,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555835461] [2021-06-05 04:47:03,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:03,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:47:03,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:03,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:47:03,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:03,226 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:03,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555835461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:03,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:03,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:47:03,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618472307] [2021-06-05 04:47:03,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:47:03,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:03,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:47:03,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:47:03,227 INFO L87 Difference]: Start difference. First operand 371 states and 1110 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:03,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:03,470 INFO L93 Difference]: Finished difference Result 543 states and 1580 transitions. [2021-06-05 04:47:03,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:47:03,470 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:47:03,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:03,471 INFO L225 Difference]: With dead ends: 543 [2021-06-05 04:47:03,471 INFO L226 Difference]: Without dead ends: 533 [2021-06-05 04:47:03,471 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 226.6ms TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:47:03,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-06-05 04:47:03,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 350. [2021-06-05 04:47:03,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 2.9713467048710602) internal successors, (1037), 349 states have internal predecessors, (1037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:03,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1037 transitions. [2021-06-05 04:47:03,475 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1037 transitions. Word has length 22 [2021-06-05 04:47:03,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:03,475 INFO L482 AbstractCegarLoop]: Abstraction has 350 states and 1037 transitions. [2021-06-05 04:47:03,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:03,475 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1037 transitions. [2021-06-05 04:47:03,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:47:03,476 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:03,476 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:03,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1409,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:03,697 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:03,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:03,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1576611606, now seen corresponding path program 130 times [2021-06-05 04:47:03,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:03,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384972200] [2021-06-05 04:47:03,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:03,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:03,787 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:03,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:03,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384972200] [2021-06-05 04:47:03,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384972200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:03,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114477307] [2021-06-05 04:47:03,787 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:03,855 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:47:03,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:03,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:47:03,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:04,015 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:04,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114477307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:04,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:04,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:47:04,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512303130] [2021-06-05 04:47:04,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:47:04,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:04,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:47:04,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:47:04,016 INFO L87 Difference]: Start difference. First operand 350 states and 1037 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:04,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:04,328 INFO L93 Difference]: Finished difference Result 476 states and 1410 transitions. [2021-06-05 04:47:04,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:47:04,328 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:47:04,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:04,329 INFO L225 Difference]: With dead ends: 476 [2021-06-05 04:47:04,329 INFO L226 Difference]: Without dead ends: 476 [2021-06-05 04:47:04,329 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 285.9ms TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:47:04,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-06-05 04:47:04,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 347. [2021-06-05 04:47:04,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 2.9710982658959537) internal successors, (1028), 346 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:04,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1028 transitions. [2021-06-05 04:47:04,333 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1028 transitions. Word has length 22 [2021-06-05 04:47:04,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:04,333 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 1028 transitions. [2021-06-05 04:47:04,333 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:04,333 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1028 transitions. [2021-06-05 04:47:04,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:47:04,333 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:04,333 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:04,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1418,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:04,534 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:04,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:04,534 INFO L82 PathProgramCache]: Analyzing trace with hash -852679658, now seen corresponding path program 131 times [2021-06-05 04:47:04,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:04,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189063401] [2021-06-05 04:47:04,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:04,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:04,607 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:04,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:04,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189063401] [2021-06-05 04:47:04,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189063401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:04,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396902193] [2021-06-05 04:47:04,608 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:04,676 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:47:04,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:04,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:47:04,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:04,817 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:04,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396902193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:04,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:04,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:47:04,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187447223] [2021-06-05 04:47:04,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:47:04,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:04,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:47:04,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:47:04,818 INFO L87 Difference]: Start difference. First operand 347 states and 1028 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:05,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:05,064 INFO L93 Difference]: Finished difference Result 525 states and 1504 transitions. [2021-06-05 04:47:05,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:47:05,064 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:47:05,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:05,065 INFO L225 Difference]: With dead ends: 525 [2021-06-05 04:47:05,065 INFO L226 Difference]: Without dead ends: 525 [2021-06-05 04:47:05,065 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 246.3ms TimeCoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:47:05,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-06-05 04:47:05,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 355. [2021-06-05 04:47:05,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 2.983050847457627) internal successors, (1056), 354 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:05,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1056 transitions. [2021-06-05 04:47:05,069 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1056 transitions. Word has length 22 [2021-06-05 04:47:05,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:05,069 INFO L482 AbstractCegarLoop]: Abstraction has 355 states and 1056 transitions. [2021-06-05 04:47:05,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:05,069 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1056 transitions. [2021-06-05 04:47:05,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:47:05,070 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:05,070 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:05,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1422 [2021-06-05 04:47:05,270 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:05,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:05,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1930268194, now seen corresponding path program 132 times [2021-06-05 04:47:05,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:05,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842916114] [2021-06-05 04:47:05,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:05,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:05,349 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:05,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:05,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842916114] [2021-06-05 04:47:05,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842916114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:05,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251370065] [2021-06-05 04:47:05,349 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:05,418 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:47:05,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:05,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:47:05,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:05,556 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:05,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251370065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:05,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:05,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:47:05,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491139162] [2021-06-05 04:47:05,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:47:05,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:05,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:47:05,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:47:05,557 INFO L87 Difference]: Start difference. First operand 355 states and 1056 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:05,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:05,884 INFO L93 Difference]: Finished difference Result 496 states and 1427 transitions. [2021-06-05 04:47:05,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:47:05,884 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:47:05,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:05,885 INFO L225 Difference]: With dead ends: 496 [2021-06-05 04:47:05,885 INFO L226 Difference]: Without dead ends: 487 [2021-06-05 04:47:05,885 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 299.8ms TimeCoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:47:05,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2021-06-05 04:47:05,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 355. [2021-06-05 04:47:05,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 2.9548022598870056) internal successors, (1046), 354 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:05,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1046 transitions. [2021-06-05 04:47:05,889 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1046 transitions. Word has length 22 [2021-06-05 04:47:05,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:05,889 INFO L482 AbstractCegarLoop]: Abstraction has 355 states and 1046 transitions. [2021-06-05 04:47:05,889 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:05,889 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1046 transitions. [2021-06-05 04:47:05,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:47:05,889 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:05,890 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:06,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1430 [2021-06-05 04:47:06,090 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:06,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:06,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1752344734, now seen corresponding path program 133 times [2021-06-05 04:47:06,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:06,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883042300] [2021-06-05 04:47:06,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:06,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:06,163 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:06,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:06,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883042300] [2021-06-05 04:47:06,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883042300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:06,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536190555] [2021-06-05 04:47:06,163 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:06,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:06,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:47:06,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:06,375 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:06,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536190555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:06,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:06,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:47:06,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594122673] [2021-06-05 04:47:06,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:47:06,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:06,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:47:06,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:47:06,376 INFO L87 Difference]: Start difference. First operand 355 states and 1046 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:06,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:06,669 INFO L93 Difference]: Finished difference Result 435 states and 1284 transitions. [2021-06-05 04:47:06,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:47:06,669 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:47:06,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:06,670 INFO L225 Difference]: With dead ends: 435 [2021-06-05 04:47:06,670 INFO L226 Difference]: Without dead ends: 435 [2021-06-05 04:47:06,670 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 264.4ms TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:47:06,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-06-05 04:47:06,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 324. [2021-06-05 04:47:06,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.9473684210526314) internal successors, (952), 323 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:06,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 952 transitions. [2021-06-05 04:47:06,673 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 952 transitions. Word has length 22 [2021-06-05 04:47:06,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:06,674 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 952 transitions. [2021-06-05 04:47:06,674 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:06,674 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 952 transitions. [2021-06-05 04:47:06,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:47:06,674 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:06,674 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:06,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1441 [2021-06-05 04:47:06,875 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:06,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:06,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1705035186, now seen corresponding path program 134 times [2021-06-05 04:47:06,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:06,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414154249] [2021-06-05 04:47:06,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:06,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:06,955 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:06,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:06,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414154249] [2021-06-05 04:47:06,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414154249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:06,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967581530] [2021-06-05 04:47:06,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:07,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:47:07,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:07,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:47:07,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:07,182 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:07,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967581530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:07,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:07,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:47:07,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469843849] [2021-06-05 04:47:07,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:47:07,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:07,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:47:07,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:47:07,183 INFO L87 Difference]: Start difference. First operand 324 states and 952 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:07,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:07,514 INFO L93 Difference]: Finished difference Result 750 states and 2186 transitions. [2021-06-05 04:47:07,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:47:07,514 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:47:07,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:07,515 INFO L225 Difference]: With dead ends: 750 [2021-06-05 04:47:07,515 INFO L226 Difference]: Without dead ends: 750 [2021-06-05 04:47:07,515 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 356.2ms TimeCoverageRelationStatistics Valid=132, Invalid=374, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:47:07,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2021-06-05 04:47:07,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 344. [2021-06-05 04:47:07,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 3.008746355685131) internal successors, (1032), 343 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:07,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1032 transitions. [2021-06-05 04:47:07,520 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1032 transitions. Word has length 22 [2021-06-05 04:47:07,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:07,520 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 1032 transitions. [2021-06-05 04:47:07,520 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:07,520 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1032 transitions. [2021-06-05 04:47:07,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:47:07,520 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:07,520 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:07,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1448 [2021-06-05 04:47:07,721 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:07,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:07,721 INFO L82 PathProgramCache]: Analyzing trace with hash -210432222, now seen corresponding path program 135 times [2021-06-05 04:47:07,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:07,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108231014] [2021-06-05 04:47:07,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:07,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:07,782 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:07,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:07,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108231014] [2021-06-05 04:47:07,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108231014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:07,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376300235] [2021-06-05 04:47:07,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:07,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:47:07,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:07,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:47:07,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:08,024 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:08,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376300235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:08,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:08,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:47:08,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787187887] [2021-06-05 04:47:08,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:47:08,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:08,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:47:08,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:47:08,025 INFO L87 Difference]: Start difference. First operand 344 states and 1032 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:08,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:08,631 INFO L93 Difference]: Finished difference Result 773 states and 2241 transitions. [2021-06-05 04:47:08,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:47:08,631 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:47:08,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:08,632 INFO L225 Difference]: With dead ends: 773 [2021-06-05 04:47:08,632 INFO L226 Difference]: Without dead ends: 763 [2021-06-05 04:47:08,632 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 569.2ms TimeCoverageRelationStatistics Valid=214, Invalid=716, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:47:08,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2021-06-05 04:47:08,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 341. [2021-06-05 04:47:08,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 3.0) internal successors, (1020), 340 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:08,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1020 transitions. [2021-06-05 04:47:08,637 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1020 transitions. Word has length 22 [2021-06-05 04:47:08,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:08,637 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1020 transitions. [2021-06-05 04:47:08,637 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:08,637 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1020 transitions. [2021-06-05 04:47:08,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:47:08,637 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:08,637 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:08,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1462 [2021-06-05 04:47:08,842 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:08,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:08,842 INFO L82 PathProgramCache]: Analyzing trace with hash 214514988, now seen corresponding path program 136 times [2021-06-05 04:47:08,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:08,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138356966] [2021-06-05 04:47:08,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:08,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:08,899 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:08,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:08,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138356966] [2021-06-05 04:47:08,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138356966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:08,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608435621] [2021-06-05 04:47:08,899 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:08,968 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:47:08,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:08,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:47:08,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:09,136 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:09,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608435621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:09,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:09,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:47:09,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956866959] [2021-06-05 04:47:09,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:47:09,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:09,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:47:09,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:47:09,136 INFO L87 Difference]: Start difference. First operand 341 states and 1020 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:09,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:09,545 INFO L93 Difference]: Finished difference Result 747 states and 2178 transitions. [2021-06-05 04:47:09,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:47:09,545 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:47:09,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:09,546 INFO L225 Difference]: With dead ends: 747 [2021-06-05 04:47:09,546 INFO L226 Difference]: Without dead ends: 727 [2021-06-05 04:47:09,546 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 409.4ms TimeCoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:47:09,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 727 states. [2021-06-05 04:47:09,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 727 to 338. [2021-06-05 04:47:09,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 2.9910979228486645) internal successors, (1008), 337 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:09,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1008 transitions. [2021-06-05 04:47:09,552 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1008 transitions. Word has length 22 [2021-06-05 04:47:09,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:09,552 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 1008 transitions. [2021-06-05 04:47:09,553 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:09,553 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1008 transitions. [2021-06-05 04:47:09,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:47:09,553 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:09,553 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:09,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1473 [2021-06-05 04:47:09,773 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:09,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:09,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1986111548, now seen corresponding path program 137 times [2021-06-05 04:47:09,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:09,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430371239] [2021-06-05 04:47:09,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:09,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:09,826 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:09,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:09,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430371239] [2021-06-05 04:47:09,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430371239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:09,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466616905] [2021-06-05 04:47:09,826 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:09,896 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:47:09,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:09,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:47:09,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:10,031 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:10,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466616905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:10,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:10,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:47:10,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391459077] [2021-06-05 04:47:10,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:47:10,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:10,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:47:10,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:47:10,032 INFO L87 Difference]: Start difference. First operand 338 states and 1008 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:10,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:10,378 INFO L93 Difference]: Finished difference Result 756 states and 2173 transitions. [2021-06-05 04:47:10,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:47:10,379 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:47:10,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:10,379 INFO L225 Difference]: With dead ends: 756 [2021-06-05 04:47:10,379 INFO L226 Difference]: Without dead ends: 720 [2021-06-05 04:47:10,380 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 310.7ms TimeCoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:47:10,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states. [2021-06-05 04:47:10,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 332. [2021-06-05 04:47:10,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 2.972809667673716) internal successors, (984), 331 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:10,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 984 transitions. [2021-06-05 04:47:10,384 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 984 transitions. Word has length 22 [2021-06-05 04:47:10,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:10,384 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 984 transitions. [2021-06-05 04:47:10,384 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:10,384 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 984 transitions. [2021-06-05 04:47:10,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:47:10,384 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:10,384 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:10,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1481,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:10,585 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:10,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:10,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1654265104, now seen corresponding path program 138 times [2021-06-05 04:47:10,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:10,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328805789] [2021-06-05 04:47:10,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:10,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:10,650 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:10,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:10,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328805789] [2021-06-05 04:47:10,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328805789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:10,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432142015] [2021-06-05 04:47:10,650 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:10,720 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:47:10,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:10,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:47:10,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:10,886 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:10,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432142015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:10,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:10,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:47:10,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826972782] [2021-06-05 04:47:10,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:47:10,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:10,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:47:10,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:47:10,887 INFO L87 Difference]: Start difference. First operand 332 states and 984 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:11,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:11,263 INFO L93 Difference]: Finished difference Result 659 states and 1924 transitions. [2021-06-05 04:47:11,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:47:11,263 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:47:11,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:11,264 INFO L225 Difference]: With dead ends: 659 [2021-06-05 04:47:11,264 INFO L226 Difference]: Without dead ends: 659 [2021-06-05 04:47:11,264 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 363.7ms TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:47:11,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2021-06-05 04:47:11,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 340. [2021-06-05 04:47:11,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 3.0) internal successors, (1017), 339 states have internal predecessors, (1017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:11,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1017 transitions. [2021-06-05 04:47:11,268 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1017 transitions. Word has length 22 [2021-06-05 04:47:11,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:11,268 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1017 transitions. [2021-06-05 04:47:11,268 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:11,268 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1017 transitions. [2021-06-05 04:47:11,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:47:11,269 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:11,269 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:11,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1489 [2021-06-05 04:47:11,469 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:11,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:11,469 INFO L82 PathProgramCache]: Analyzing trace with hash -159662140, now seen corresponding path program 139 times [2021-06-05 04:47:11,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:11,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675923783] [2021-06-05 04:47:11,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:11,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:11,530 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:11,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:11,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675923783] [2021-06-05 04:47:11,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675923783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:11,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070473713] [2021-06-05 04:47:11,530 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:11,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:11,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:47:11,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:11,780 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:11,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070473713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:11,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:11,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:47:11,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003117306] [2021-06-05 04:47:11,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:47:11,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:11,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:47:11,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:47:11,781 INFO L87 Difference]: Start difference. First operand 340 states and 1017 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:12,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:12,632 INFO L93 Difference]: Finished difference Result 743 states and 2162 transitions. [2021-06-05 04:47:12,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:47:12,632 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:47:12,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:12,633 INFO L225 Difference]: With dead ends: 743 [2021-06-05 04:47:12,633 INFO L226 Difference]: Without dead ends: 733 [2021-06-05 04:47:12,633 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 790.4ms TimeCoverageRelationStatistics Valid=240, Invalid=882, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 04:47:12,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2021-06-05 04:47:12,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 337. [2021-06-05 04:47:12,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 2.9910714285714284) internal successors, (1005), 336 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:12,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1005 transitions. [2021-06-05 04:47:12,637 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1005 transitions. Word has length 22 [2021-06-05 04:47:12,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:12,637 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 1005 transitions. [2021-06-05 04:47:12,637 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:12,638 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1005 transitions. [2021-06-05 04:47:12,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:47:12,638 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:12,638 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:12,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1501,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:12,838 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:12,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:12,839 INFO L82 PathProgramCache]: Analyzing trace with hash 265285070, now seen corresponding path program 140 times [2021-06-05 04:47:12,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:12,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474674987] [2021-06-05 04:47:12,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:12,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:12,897 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:12,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:12,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474674987] [2021-06-05 04:47:12,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474674987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:12,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24727355] [2021-06-05 04:47:12,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:12,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:47:12,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:12,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:47:12,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:13,161 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:13,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24727355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:13,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:13,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:47:13,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321512124] [2021-06-05 04:47:13,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:47:13,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:13,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:47:13,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:47:13,162 INFO L87 Difference]: Start difference. First operand 337 states and 1005 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:13,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:13,697 INFO L93 Difference]: Finished difference Result 667 states and 1949 transitions. [2021-06-05 04:47:13,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:47:13,697 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:47:13,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:13,698 INFO L225 Difference]: With dead ends: 667 [2021-06-05 04:47:13,698 INFO L226 Difference]: Without dead ends: 647 [2021-06-05 04:47:13,698 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 522.3ms TimeCoverageRelationStatistics Valid=202, Invalid=728, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:47:13,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2021-06-05 04:47:13,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 334. [2021-06-05 04:47:13,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 2.981981981981982) internal successors, (993), 333 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:13,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 993 transitions. [2021-06-05 04:47:13,703 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 993 transitions. Word has length 22 [2021-06-05 04:47:13,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:13,703 INFO L482 AbstractCegarLoop]: Abstraction has 334 states and 993 transitions. [2021-06-05 04:47:13,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:13,703 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 993 transitions. [2021-06-05 04:47:13,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:47:13,703 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:13,703 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:13,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1513 [2021-06-05 04:47:13,904 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:13,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:13,904 INFO L82 PathProgramCache]: Analyzing trace with hash -549395800, now seen corresponding path program 141 times [2021-06-05 04:47:13,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:13,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569781434] [2021-06-05 04:47:13,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:13,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:13,968 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:13,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:13,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569781434] [2021-06-05 04:47:13,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569781434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:13,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507657393] [2021-06-05 04:47:13,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:14,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:47:14,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:14,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:47:14,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:14,202 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:14,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507657393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:14,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:14,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:47:14,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758009531] [2021-06-05 04:47:14,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:47:14,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:14,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:47:14,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:47:14,202 INFO L87 Difference]: Start difference. First operand 334 states and 993 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:14,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:14,750 INFO L93 Difference]: Finished difference Result 777 states and 2260 transitions. [2021-06-05 04:47:14,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:47:14,751 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:47:14,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:14,751 INFO L225 Difference]: With dead ends: 777 [2021-06-05 04:47:14,752 INFO L226 Difference]: Without dead ends: 777 [2021-06-05 04:47:14,752 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 500.4ms TimeCoverageRelationStatistics Valid=162, Invalid=438, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:47:14,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states. [2021-06-05 04:47:14,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 344. [2021-06-05 04:47:14,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 3.0320699708454812) internal successors, (1040), 343 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:14,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1040 transitions. [2021-06-05 04:47:14,756 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1040 transitions. Word has length 22 [2021-06-05 04:47:14,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:14,756 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 1040 transitions. [2021-06-05 04:47:14,756 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:14,756 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1040 transitions. [2021-06-05 04:47:14,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:47:14,757 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:14,757 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:14,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1521 [2021-06-05 04:47:14,957 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:14,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:14,957 INFO L82 PathProgramCache]: Analyzing trace with hash 945207164, now seen corresponding path program 142 times [2021-06-05 04:47:14,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:14,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494255715] [2021-06-05 04:47:14,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:14,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:15,025 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:15,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:15,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494255715] [2021-06-05 04:47:15,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494255715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:15,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517566798] [2021-06-05 04:47:15,025 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:15,096 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:47:15,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:15,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:47:15,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:15,261 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:15,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517566798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:15,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:15,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:47:15,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116779728] [2021-06-05 04:47:15,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:47:15,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:15,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:47:15,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:47:15,262 INFO L87 Difference]: Start difference. First operand 344 states and 1040 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:16,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:16,312 INFO L93 Difference]: Finished difference Result 860 states and 2485 transitions. [2021-06-05 04:47:16,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 04:47:16,313 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:47:16,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:16,314 INFO L225 Difference]: With dead ends: 860 [2021-06-05 04:47:16,314 INFO L226 Difference]: Without dead ends: 850 [2021-06-05 04:47:16,314 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 919.1ms TimeCoverageRelationStatistics Valid=355, Invalid=1205, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 04:47:16,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850 states. [2021-06-05 04:47:16,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 351. [2021-06-05 04:47:16,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 3.0114285714285716) internal successors, (1054), 350 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:16,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1054 transitions. [2021-06-05 04:47:16,319 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1054 transitions. Word has length 22 [2021-06-05 04:47:16,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:16,319 INFO L482 AbstractCegarLoop]: Abstraction has 351 states and 1054 transitions. [2021-06-05 04:47:16,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:16,319 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1054 transitions. [2021-06-05 04:47:16,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:47:16,319 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:16,319 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:16,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1535,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:16,521 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:16,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:16,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1899228176, now seen corresponding path program 143 times [2021-06-05 04:47:16,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:16,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399594072] [2021-06-05 04:47:16,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:16,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:16,587 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:16,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:16,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399594072] [2021-06-05 04:47:16,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399594072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:16,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228041185] [2021-06-05 04:47:16,587 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:16,662 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:47:16,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:16,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:47:16,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:16,864 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:16,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228041185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:16,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:16,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:47:16,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926356604] [2021-06-05 04:47:16,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:47:16,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:16,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:47:16,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:47:16,865 INFO L87 Difference]: Start difference. First operand 351 states and 1054 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:17,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:17,261 INFO L93 Difference]: Finished difference Result 710 states and 2069 transitions. [2021-06-05 04:47:17,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:47:17,262 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:47:17,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:17,263 INFO L225 Difference]: With dead ends: 710 [2021-06-05 04:47:17,263 INFO L226 Difference]: Without dead ends: 710 [2021-06-05 04:47:17,263 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 412.8ms TimeCoverageRelationStatistics Valid=141, Invalid=365, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:47:17,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2021-06-05 04:47:17,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 342. [2021-06-05 04:47:17,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 3.0175953079178885) internal successors, (1029), 341 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:17,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1029 transitions. [2021-06-05 04:47:17,267 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1029 transitions. Word has length 22 [2021-06-05 04:47:17,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:17,267 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 1029 transitions. [2021-06-05 04:47:17,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:17,267 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1029 transitions. [2021-06-05 04:47:17,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:47:17,268 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:17,268 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:17,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1546 [2021-06-05 04:47:17,468 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:17,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:17,469 INFO L82 PathProgramCache]: Analyzing trace with hash 883719676, now seen corresponding path program 144 times [2021-06-05 04:47:17,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:17,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248747050] [2021-06-05 04:47:17,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:17,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:17,540 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:17,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:17,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248747050] [2021-06-05 04:47:17,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248747050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:17,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84131465] [2021-06-05 04:47:17,541 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:17,626 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:47:17,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:17,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:47:17,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:17,768 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:17,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84131465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:17,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:17,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:47:17,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744110426] [2021-06-05 04:47:17,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:47:17,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:17,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:47:17,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:47:17,769 INFO L87 Difference]: Start difference. First operand 342 states and 1029 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:18,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:18,143 INFO L93 Difference]: Finished difference Result 701 states and 2021 transitions. [2021-06-05 04:47:18,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:47:18,144 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:47:18,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:18,145 INFO L225 Difference]: With dead ends: 701 [2021-06-05 04:47:18,145 INFO L226 Difference]: Without dead ends: 692 [2021-06-05 04:47:18,145 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 355.3ms TimeCoverageRelationStatistics Valid=139, Invalid=367, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:47:18,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2021-06-05 04:47:18,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 348. [2021-06-05 04:47:18,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 3.0) internal successors, (1041), 347 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:18,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1041 transitions. [2021-06-05 04:47:18,149 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1041 transitions. Word has length 22 [2021-06-05 04:47:18,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:18,149 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 1041 transitions. [2021-06-05 04:47:18,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:18,149 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1041 transitions. [2021-06-05 04:47:18,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:47:18,150 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:18,150 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:18,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1557,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:18,350 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:18,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:18,350 INFO L82 PathProgramCache]: Analyzing trace with hash 661159310, now seen corresponding path program 145 times [2021-06-05 04:47:18,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:18,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211689872] [2021-06-05 04:47:18,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:18,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:18,428 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:18,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:18,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211689872] [2021-06-05 04:47:18,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211689872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:18,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223331425] [2021-06-05 04:47:18,428 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:18,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:18,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:47:18,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:18,638 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:18,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223331425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:18,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:18,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 04:47:18,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968214215] [2021-06-05 04:47:18,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:47:18,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:18,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:47:18,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:47:18,639 INFO L87 Difference]: Start difference. First operand 348 states and 1041 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:19,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:19,617 INFO L93 Difference]: Finished difference Result 796 states and 2271 transitions. [2021-06-05 04:47:19,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:47:19,617 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:47:19,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:19,618 INFO L225 Difference]: With dead ends: 796 [2021-06-05 04:47:19,618 INFO L226 Difference]: Without dead ends: 786 [2021-06-05 04:47:19,618 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 843.2ms TimeCoverageRelationStatistics Valid=285, Invalid=905, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 04:47:19,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 786 states. [2021-06-05 04:47:19,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 786 to 370. [2021-06-05 04:47:19,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 2.994579945799458) internal successors, (1105), 369 states have internal predecessors, (1105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:19,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 1105 transitions. [2021-06-05 04:47:19,623 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 1105 transitions. Word has length 22 [2021-06-05 04:47:19,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:19,623 INFO L482 AbstractCegarLoop]: Abstraction has 370 states and 1105 transitions. [2021-06-05 04:47:19,623 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:19,623 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 1105 transitions. [2021-06-05 04:47:19,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:47:19,623 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:19,623 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:19,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1570,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:19,824 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:19,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:19,824 INFO L82 PathProgramCache]: Analyzing trace with hash 479068998, now seen corresponding path program 146 times [2021-06-05 04:47:19,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:19,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932828538] [2021-06-05 04:47:19,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:19,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:19,884 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:19,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:19,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932828538] [2021-06-05 04:47:19,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932828538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:19,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267340375] [2021-06-05 04:47:19,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:19,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:47:19,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:19,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:47:19,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:20,113 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:20,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267340375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:20,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:20,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 04:47:20,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830684193] [2021-06-05 04:47:20,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:47:20,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:20,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:47:20,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:47:20,114 INFO L87 Difference]: Start difference. First operand 370 states and 1105 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:20,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:20,952 INFO L93 Difference]: Finished difference Result 786 states and 2232 transitions. [2021-06-05 04:47:20,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:47:20,952 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:47:20,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:20,953 INFO L225 Difference]: With dead ends: 786 [2021-06-05 04:47:20,953 INFO L226 Difference]: Without dead ends: 774 [2021-06-05 04:47:20,953 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 754.0ms TimeCoverageRelationStatistics Valid=279, Invalid=843, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 04:47:20,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2021-06-05 04:47:20,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 350. [2021-06-05 04:47:20,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 2.994269340974212) internal successors, (1045), 349 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:20,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1045 transitions. [2021-06-05 04:47:20,960 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1045 transitions. Word has length 22 [2021-06-05 04:47:20,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:20,960 INFO L482 AbstractCegarLoop]: Abstraction has 350 states and 1045 transitions. [2021-06-05 04:47:20,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:20,960 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1045 transitions. [2021-06-05 04:47:20,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:47:20,961 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:20,961 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:21,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1584 [2021-06-05 04:47:21,183 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:21,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:21,183 INFO L82 PathProgramCache]: Analyzing trace with hash 49736188, now seen corresponding path program 147 times [2021-06-05 04:47:21,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:21,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157370749] [2021-06-05 04:47:21,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:21,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:21,241 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:21,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:21,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157370749] [2021-06-05 04:47:21,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157370749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:21,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310808430] [2021-06-05 04:47:21,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:21,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:47:21,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:21,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:47:21,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:21,457 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:21,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310808430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:21,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:21,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:47:21,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886922375] [2021-06-05 04:47:21,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:47:21,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:21,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:47:21,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:47:21,458 INFO L87 Difference]: Start difference. First operand 350 states and 1045 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:21,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:21,899 INFO L93 Difference]: Finished difference Result 649 states and 1895 transitions. [2021-06-05 04:47:21,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:47:21,899 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:47:21,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:21,900 INFO L225 Difference]: With dead ends: 649 [2021-06-05 04:47:21,900 INFO L226 Difference]: Without dead ends: 629 [2021-06-05 04:47:21,900 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 426.4ms TimeCoverageRelationStatistics Valid=149, Invalid=501, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:47:21,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2021-06-05 04:47:21,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 356. [2021-06-05 04:47:21,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 2.980281690140845) internal successors, (1058), 355 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:21,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 1058 transitions. [2021-06-05 04:47:21,905 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 1058 transitions. Word has length 22 [2021-06-05 04:47:21,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:21,905 INFO L482 AbstractCegarLoop]: Abstraction has 356 states and 1058 transitions. [2021-06-05 04:47:21,905 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:21,905 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 1058 transitions. [2021-06-05 04:47:21,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:47:21,905 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:21,905 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:22,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1598 [2021-06-05 04:47:22,106 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:22,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:22,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1300096188, now seen corresponding path program 148 times [2021-06-05 04:47:22,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:22,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662562956] [2021-06-05 04:47:22,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:22,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:22,162 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:22,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:22,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662562956] [2021-06-05 04:47:22,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662562956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:22,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42415271] [2021-06-05 04:47:22,163 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:22,243 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:47:22,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:22,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:47:22,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:22,385 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:22,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42415271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:22,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:22,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 04:47:22,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997411421] [2021-06-05 04:47:22,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:47:22,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:22,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:47:22,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:47:22,386 INFO L87 Difference]: Start difference. First operand 356 states and 1058 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:22,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:22,966 INFO L93 Difference]: Finished difference Result 727 states and 2073 transitions. [2021-06-05 04:47:22,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:47:22,966 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:47:22,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:22,967 INFO L225 Difference]: With dead ends: 727 [2021-06-05 04:47:22,967 INFO L226 Difference]: Without dead ends: 717 [2021-06-05 04:47:22,967 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 533.8ms TimeCoverageRelationStatistics Valid=164, Invalid=538, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:47:22,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2021-06-05 04:47:22,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 378. [2021-06-05 04:47:22,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 2.976127320954907) internal successors, (1122), 377 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:22,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 1122 transitions. [2021-06-05 04:47:22,972 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 1122 transitions. Word has length 22 [2021-06-05 04:47:22,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:22,972 INFO L482 AbstractCegarLoop]: Abstraction has 378 states and 1122 transitions. [2021-06-05 04:47:22,972 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:22,972 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 1122 transitions. [2021-06-05 04:47:22,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:47:22,973 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:22,973 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:23,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1605 [2021-06-05 04:47:23,173 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:23,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:23,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1482186500, now seen corresponding path program 149 times [2021-06-05 04:47:23,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:23,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157319633] [2021-06-05 04:47:23,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:23,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:23,233 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:23,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:23,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157319633] [2021-06-05 04:47:23,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157319633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:23,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299123542] [2021-06-05 04:47:23,234 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:23,316 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:47:23,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:23,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:47:23,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:23,490 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:23,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299123542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:23,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:23,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 04:47:23,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80331935] [2021-06-05 04:47:23,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:47:23,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:23,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:47:23,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:47:23,492 INFO L87 Difference]: Start difference. First operand 378 states and 1122 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:24,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:24,020 INFO L93 Difference]: Finished difference Result 684 states and 1962 transitions. [2021-06-05 04:47:24,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:47:24,020 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:47:24,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:24,021 INFO L225 Difference]: With dead ends: 684 [2021-06-05 04:47:24,021 INFO L226 Difference]: Without dead ends: 669 [2021-06-05 04:47:24,021 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 486.1ms TimeCoverageRelationStatistics Valid=150, Invalid=500, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:47:24,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2021-06-05 04:47:24,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 352. [2021-06-05 04:47:24,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 2.988603988603989) internal successors, (1049), 351 states have internal predecessors, (1049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:24,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 1049 transitions. [2021-06-05 04:47:24,026 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 1049 transitions. Word has length 22 [2021-06-05 04:47:24,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:24,026 INFO L482 AbstractCegarLoop]: Abstraction has 352 states and 1049 transitions. [2021-06-05 04:47:24,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:24,026 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 1049 transitions. [2021-06-05 04:47:24,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:47:24,026 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:24,026 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:24,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1615,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:24,241 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:24,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:24,241 INFO L82 PathProgramCache]: Analyzing trace with hash -400936498, now seen corresponding path program 150 times [2021-06-05 04:47:24,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:24,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780611659] [2021-06-05 04:47:24,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:24,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:24,301 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:24,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:24,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780611659] [2021-06-05 04:47:24,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780611659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:24,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158133126] [2021-06-05 04:47:24,301 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:24,391 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:47:24,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:24,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:47:24,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:24,539 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:24,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158133126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:24,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:24,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:47:24,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077238809] [2021-06-05 04:47:24,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:47:24,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:24,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:47:24,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:47:24,539 INFO L87 Difference]: Start difference. First operand 352 states and 1049 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:24,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:24,934 INFO L93 Difference]: Finished difference Result 665 states and 1917 transitions. [2021-06-05 04:47:24,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:47:24,934 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:47:24,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:24,935 INFO L225 Difference]: With dead ends: 665 [2021-06-05 04:47:24,935 INFO L226 Difference]: Without dead ends: 629 [2021-06-05 04:47:24,935 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 366.1ms TimeCoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:47:24,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2021-06-05 04:47:24,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 362. [2021-06-05 04:47:24,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 2.96398891966759) internal successors, (1070), 361 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:24,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 1070 transitions. [2021-06-05 04:47:24,939 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 1070 transitions. Word has length 22 [2021-06-05 04:47:24,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:24,940 INFO L482 AbstractCegarLoop]: Abstraction has 362 states and 1070 transitions. [2021-06-05 04:47:24,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:24,940 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 1070 transitions. [2021-06-05 04:47:24,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:47:24,940 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:24,940 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:25,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1627 [2021-06-05 04:47:25,141 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:25,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:25,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1124721900, now seen corresponding path program 151 times [2021-06-05 04:47:25,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:25,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250835572] [2021-06-05 04:47:25,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:25,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:25,194 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:25,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:25,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250835572] [2021-06-05 04:47:25,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250835572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:25,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51353310] [2021-06-05 04:47:25,195 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:25,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:25,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:47:25,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:25,402 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:25,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51353310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:25,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:25,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:47:25,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953170943] [2021-06-05 04:47:25,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:47:25,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:25,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:47:25,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:47:25,403 INFO L87 Difference]: Start difference. First operand 362 states and 1070 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:25,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:25,758 INFO L93 Difference]: Finished difference Result 609 states and 1767 transitions. [2021-06-05 04:47:25,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:47:25,759 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:47:25,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:25,759 INFO L225 Difference]: With dead ends: 609 [2021-06-05 04:47:25,759 INFO L226 Difference]: Without dead ends: 589 [2021-06-05 04:47:25,760 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 338.1ms TimeCoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:47:25,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-06-05 04:47:25,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 368. [2021-06-05 04:47:25,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 2.9509536784741144) internal successors, (1083), 367 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:25,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 1083 transitions. [2021-06-05 04:47:25,764 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 1083 transitions. Word has length 22 [2021-06-05 04:47:25,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:25,764 INFO L482 AbstractCegarLoop]: Abstraction has 368 states and 1083 transitions. [2021-06-05 04:47:25,764 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:25,764 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 1083 transitions. [2021-06-05 04:47:25,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:47:25,764 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:25,765 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:25,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1637,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:25,965 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:25,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:25,965 INFO L82 PathProgramCache]: Analyzing trace with hash -225110476, now seen corresponding path program 152 times [2021-06-05 04:47:25,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:25,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189770996] [2021-06-05 04:47:25,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:25,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:26,026 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:26,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:26,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189770996] [2021-06-05 04:47:26,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189770996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:26,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92993807] [2021-06-05 04:47:26,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:26,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:47:26,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:26,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:47:26,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:26,245 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:26,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92993807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:26,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:26,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 04:47:26,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734843983] [2021-06-05 04:47:26,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:47:26,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:26,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:47:26,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:47:26,246 INFO L87 Difference]: Start difference. First operand 368 states and 1083 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:26,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:26,731 INFO L93 Difference]: Finished difference Result 687 states and 1945 transitions. [2021-06-05 04:47:26,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:47:26,732 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:47:26,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:26,732 INFO L225 Difference]: With dead ends: 687 [2021-06-05 04:47:26,732 INFO L226 Difference]: Without dead ends: 677 [2021-06-05 04:47:26,733 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 462.5ms TimeCoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:47:26,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2021-06-05 04:47:26,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 390. [2021-06-05 04:47:26,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 2.948586118251928) internal successors, (1147), 389 states have internal predecessors, (1147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:26,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1147 transitions. [2021-06-05 04:47:26,737 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1147 transitions. Word has length 22 [2021-06-05 04:47:26,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:26,737 INFO L482 AbstractCegarLoop]: Abstraction has 390 states and 1147 transitions. [2021-06-05 04:47:26,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:26,737 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1147 transitions. [2021-06-05 04:47:26,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:47:26,738 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:26,738 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:26,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1645,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:26,938 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:26,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:26,939 INFO L82 PathProgramCache]: Analyzing trace with hash -407200788, now seen corresponding path program 153 times [2021-06-05 04:47:26,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:26,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767447618] [2021-06-05 04:47:26,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:26,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:26,994 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:26,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:26,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767447618] [2021-06-05 04:47:26,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767447618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:26,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121129953] [2021-06-05 04:47:26,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:27,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:47:27,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:27,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:47:27,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:27,251 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:27,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121129953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:27,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:27,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 04:47:27,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454451847] [2021-06-05 04:47:27,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:47:27,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:27,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:47:27,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:47:27,252 INFO L87 Difference]: Start difference. First operand 390 states and 1147 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:27,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:27,580 INFO L93 Difference]: Finished difference Result 644 states and 1834 transitions. [2021-06-05 04:47:27,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:47:27,581 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:47:27,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:27,582 INFO L225 Difference]: With dead ends: 644 [2021-06-05 04:47:27,582 INFO L226 Difference]: Without dead ends: 624 [2021-06-05 04:47:27,582 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 351.5ms TimeCoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:47:27,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2021-06-05 04:47:27,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 355. [2021-06-05 04:47:27,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 2.977401129943503) internal successors, (1054), 354 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:27,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1054 transitions. [2021-06-05 04:47:27,586 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1054 transitions. Word has length 22 [2021-06-05 04:47:27,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:27,586 INFO L482 AbstractCegarLoop]: Abstraction has 355 states and 1054 transitions. [2021-06-05 04:47:27,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:27,586 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1054 transitions. [2021-06-05 04:47:27,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:47:27,586 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:27,586 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:27,787 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1655 [2021-06-05 04:47:27,787 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:27,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:27,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1187444538, now seen corresponding path program 154 times [2021-06-05 04:47:27,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:27,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707963000] [2021-06-05 04:47:27,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:27,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:27,849 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:27,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:27,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707963000] [2021-06-05 04:47:27,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707963000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:27,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404161718] [2021-06-05 04:47:27,849 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:27,924 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:47:27,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:27,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:47:27,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:28,043 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:28,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404161718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:28,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:28,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:47:28,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038212094] [2021-06-05 04:47:28,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:47:28,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:28,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:47:28,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:47:28,044 INFO L87 Difference]: Start difference. First operand 355 states and 1054 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:28,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:28,321 INFO L93 Difference]: Finished difference Result 643 states and 1857 transitions. [2021-06-05 04:47:28,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:47:28,322 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:47:28,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:28,323 INFO L225 Difference]: With dead ends: 643 [2021-06-05 04:47:28,323 INFO L226 Difference]: Without dead ends: 643 [2021-06-05 04:47:28,323 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 259.2ms TimeCoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:47:28,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2021-06-05 04:47:28,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 364. [2021-06-05 04:47:28,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 363 states have (on average 2.9669421487603307) internal successors, (1077), 363 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:28,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 1077 transitions. [2021-06-05 04:47:28,327 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 1077 transitions. Word has length 22 [2021-06-05 04:47:28,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:28,327 INFO L482 AbstractCegarLoop]: Abstraction has 364 states and 1077 transitions. [2021-06-05 04:47:28,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:28,328 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 1077 transitions. [2021-06-05 04:47:28,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:47:28,328 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:28,328 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:28,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1665,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:28,549 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:28,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:28,550 INFO L82 PathProgramCache]: Analyzing trace with hash 307158426, now seen corresponding path program 155 times [2021-06-05 04:47:28,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:28,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406774565] [2021-06-05 04:47:28,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:28,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:28,614 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:28,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:28,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406774565] [2021-06-05 04:47:28,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406774565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:28,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863257908] [2021-06-05 04:47:28,614 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:28,689 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:47:28,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:28,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:47:28,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:28,815 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:28,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863257908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:28,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:28,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:47:28,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006883963] [2021-06-05 04:47:28,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:47:28,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:28,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:47:28,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:47:28,816 INFO L87 Difference]: Start difference. First operand 364 states and 1077 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:29,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:29,358 INFO L93 Difference]: Finished difference Result 666 states and 1909 transitions. [2021-06-05 04:47:29,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:47:29,358 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:47:29,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:29,359 INFO L225 Difference]: With dead ends: 666 [2021-06-05 04:47:29,359 INFO L226 Difference]: Without dead ends: 656 [2021-06-05 04:47:29,359 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 450.6ms TimeCoverageRelationStatistics Valid=200, Invalid=670, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:47:29,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2021-06-05 04:47:29,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 361. [2021-06-05 04:47:29,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 360 states have (on average 2.9583333333333335) internal successors, (1065), 360 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:29,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 1065 transitions. [2021-06-05 04:47:29,363 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 1065 transitions. Word has length 22 [2021-06-05 04:47:29,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:29,363 INFO L482 AbstractCegarLoop]: Abstraction has 361 states and 1065 transitions. [2021-06-05 04:47:29,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:29,363 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 1065 transitions. [2021-06-05 04:47:29,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:47:29,364 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:29,364 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:29,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1671 [2021-06-05 04:47:29,564 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:29,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:29,564 INFO L82 PathProgramCache]: Analyzing trace with hash 732105636, now seen corresponding path program 156 times [2021-06-05 04:47:29,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:29,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841693989] [2021-06-05 04:47:29,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:29,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:29,620 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:29,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:29,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841693989] [2021-06-05 04:47:29,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841693989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:29,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122043526] [2021-06-05 04:47:29,620 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:29,697 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:47:29,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:29,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:47:29,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:29,817 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:29,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122043526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:29,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:29,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:47:29,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797651601] [2021-06-05 04:47:29,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:47:29,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:29,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:47:29,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:47:29,818 INFO L87 Difference]: Start difference. First operand 361 states and 1065 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:30,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:30,151 INFO L93 Difference]: Finished difference Result 652 states and 1887 transitions. [2021-06-05 04:47:30,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:47:30,151 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:47:30,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:30,152 INFO L225 Difference]: With dead ends: 652 [2021-06-05 04:47:30,152 INFO L226 Difference]: Without dead ends: 632 [2021-06-05 04:47:30,152 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 311.6ms TimeCoverageRelationStatistics Valid=135, Invalid=465, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:47:30,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2021-06-05 04:47:30,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 358. [2021-06-05 04:47:30,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 2.9495798319327733) internal successors, (1053), 357 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:30,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 1053 transitions. [2021-06-05 04:47:30,156 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 1053 transitions. Word has length 22 [2021-06-05 04:47:30,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:30,156 INFO L482 AbstractCegarLoop]: Abstraction has 358 states and 1053 transitions. [2021-06-05 04:47:30,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:30,156 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 1053 transitions. [2021-06-05 04:47:30,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:47:30,157 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:30,157 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:30,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1676 [2021-06-05 04:47:30,357 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:30,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:30,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1791265100, now seen corresponding path program 157 times [2021-06-05 04:47:30,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:30,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350953659] [2021-06-05 04:47:30,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:30,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:30,419 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:30,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:30,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350953659] [2021-06-05 04:47:30,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350953659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:30,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671037358] [2021-06-05 04:47:30,419 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:30,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:30,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:47:30,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:30,607 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:30,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671037358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:30,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:30,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:47:30,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014626264] [2021-06-05 04:47:30,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:47:30,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:30,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:47:30,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:47:30,608 INFO L87 Difference]: Start difference. First operand 358 states and 1053 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:30,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:30,867 INFO L93 Difference]: Finished difference Result 580 states and 1679 transitions. [2021-06-05 04:47:30,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:47:30,867 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:47:30,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:30,868 INFO L225 Difference]: With dead ends: 580 [2021-06-05 04:47:30,868 INFO L226 Difference]: Without dead ends: 544 [2021-06-05 04:47:30,868 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 247.3ms TimeCoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:47:30,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-06-05 04:47:30,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 332. [2021-06-05 04:47:30,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 2.9486404833836857) internal successors, (976), 331 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:30,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 976 transitions. [2021-06-05 04:47:30,874 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 976 transitions. Word has length 22 [2021-06-05 04:47:30,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:30,874 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 976 transitions. [2021-06-05 04:47:30,874 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:30,874 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 976 transitions. [2021-06-05 04:47:30,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:47:30,874 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:30,875 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:31,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1680,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:31,089 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:31,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:31,089 INFO L82 PathProgramCache]: Analyzing trace with hash 833708592, now seen corresponding path program 158 times [2021-06-05 04:47:31,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:31,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301258180] [2021-06-05 04:47:31,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:31,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:31,149 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:31,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:31,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301258180] [2021-06-05 04:47:31,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301258180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:31,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743481345] [2021-06-05 04:47:31,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:31,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:47:31,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:31,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:47:31,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:31,349 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:31,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743481345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:31,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:31,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:47:31,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402248635] [2021-06-05 04:47:31,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:47:31,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:31,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:47:31,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:47:31,350 INFO L87 Difference]: Start difference. First operand 332 states and 976 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:31,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:31,550 INFO L93 Difference]: Finished difference Result 529 states and 1547 transitions. [2021-06-05 04:47:31,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:47:31,551 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:47:31,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:31,551 INFO L225 Difference]: With dead ends: 529 [2021-06-05 04:47:31,551 INFO L226 Difference]: Without dead ends: 529 [2021-06-05 04:47:31,551 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 176.4ms TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:47:31,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2021-06-05 04:47:31,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 341. [2021-06-05 04:47:31,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 2.9676470588235295) internal successors, (1009), 340 states have internal predecessors, (1009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:31,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1009 transitions. [2021-06-05 04:47:31,555 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1009 transitions. Word has length 22 [2021-06-05 04:47:31,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:31,555 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1009 transitions. [2021-06-05 04:47:31,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:31,555 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1009 transitions. [2021-06-05 04:47:31,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:47:31,556 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:31,556 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:31,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1684 [2021-06-05 04:47:31,761 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:31,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:31,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1966655740, now seen corresponding path program 159 times [2021-06-05 04:47:31,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:31,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579015158] [2021-06-05 04:47:31,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:31,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:31,838 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:31,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:31,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579015158] [2021-06-05 04:47:31,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579015158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:31,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750990131] [2021-06-05 04:47:31,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:31,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:47:31,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:31,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:47:31,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:32,072 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:32,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750990131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:32,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:32,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:47:32,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073079361] [2021-06-05 04:47:32,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:47:32,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:32,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:47:32,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:47:32,073 INFO L87 Difference]: Start difference. First operand 341 states and 1009 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:32,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:32,398 INFO L93 Difference]: Finished difference Result 560 states and 1626 transitions. [2021-06-05 04:47:32,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:47:32,399 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:47:32,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:32,400 INFO L225 Difference]: With dead ends: 560 [2021-06-05 04:47:32,400 INFO L226 Difference]: Without dead ends: 550 [2021-06-05 04:47:32,400 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 290.8ms TimeCoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:47:32,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-06-05 04:47:32,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 338. [2021-06-05 04:47:32,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 2.9584569732937687) internal successors, (997), 337 states have internal predecessors, (997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:32,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 997 transitions. [2021-06-05 04:47:32,405 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 997 transitions. Word has length 22 [2021-06-05 04:47:32,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:32,405 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 997 transitions. [2021-06-05 04:47:32,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:32,405 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 997 transitions. [2021-06-05 04:47:32,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:47:32,406 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:32,406 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:32,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1689 [2021-06-05 04:47:32,630 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:32,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:32,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1541708530, now seen corresponding path program 160 times [2021-06-05 04:47:32,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:32,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93332040] [2021-06-05 04:47:32,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:32,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:32,684 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:32,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:32,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93332040] [2021-06-05 04:47:32,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93332040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:32,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816472979] [2021-06-05 04:47:32,685 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:32,760 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:47:32,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:32,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:47:32,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:32,883 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:32,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816472979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:32,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:32,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:47:32,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423572375] [2021-06-05 04:47:32,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:47:32,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:32,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:47:32,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:47:32,897 INFO L87 Difference]: Start difference. First operand 338 states and 997 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:33,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:33,130 INFO L93 Difference]: Finished difference Result 511 states and 1498 transitions. [2021-06-05 04:47:33,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:47:33,131 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:47:33,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:33,131 INFO L225 Difference]: With dead ends: 511 [2021-06-05 04:47:33,131 INFO L226 Difference]: Without dead ends: 491 [2021-06-05 04:47:33,131 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 207.6ms TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:47:33,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-06-05 04:47:33,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 335. [2021-06-05 04:47:33,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 2.9491017964071857) internal successors, (985), 334 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:33,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 985 transitions. [2021-06-05 04:47:33,135 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 985 transitions. Word has length 22 [2021-06-05 04:47:33,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:33,135 INFO L482 AbstractCegarLoop]: Abstraction has 335 states and 985 transitions. [2021-06-05 04:47:33,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:33,135 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 985 transitions. [2021-06-05 04:47:33,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:47:33,135 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:33,136 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:33,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1695,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:33,336 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:33,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:33,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1380787108, now seen corresponding path program 161 times [2021-06-05 04:47:33,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:33,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961886653] [2021-06-05 04:47:33,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:33,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:33,416 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:33,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:33,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961886653] [2021-06-05 04:47:33,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961886653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:33,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070788350] [2021-06-05 04:47:33,417 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:33,505 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:47:33,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:33,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:47:33,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:33,640 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:33,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070788350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:33,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:33,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:47:33,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998754815] [2021-06-05 04:47:33,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:47:33,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:33,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:47:33,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:47:33,641 INFO L87 Difference]: Start difference. First operand 335 states and 985 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:33,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:33,890 INFO L93 Difference]: Finished difference Result 621 states and 1797 transitions. [2021-06-05 04:47:33,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:47:33,890 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:47:33,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:33,891 INFO L225 Difference]: With dead ends: 621 [2021-06-05 04:47:33,891 INFO L226 Difference]: Without dead ends: 621 [2021-06-05 04:47:33,891 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 227.5ms TimeCoverageRelationStatistics Valid=143, Invalid=319, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:47:33,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2021-06-05 04:47:33,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 347. [2021-06-05 04:47:33,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 2.985549132947977) internal successors, (1033), 346 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:33,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1033 transitions. [2021-06-05 04:47:33,895 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1033 transitions. Word has length 22 [2021-06-05 04:47:33,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:33,895 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 1033 transitions. [2021-06-05 04:47:33,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:33,895 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1033 transitions. [2021-06-05 04:47:33,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:47:33,896 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:33,896 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:34,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1698 [2021-06-05 04:47:34,096 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:34,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:34,097 INFO L82 PathProgramCache]: Analyzing trace with hash 113815856, now seen corresponding path program 162 times [2021-06-05 04:47:34,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:34,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152710750] [2021-06-05 04:47:34,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:34,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:34,164 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:34,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:34,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152710750] [2021-06-05 04:47:34,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152710750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:34,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311047423] [2021-06-05 04:47:34,164 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:34,241 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:47:34,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:34,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:47:34,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:34,357 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:34,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311047423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:34,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:34,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:47:34,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407563716] [2021-06-05 04:47:34,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:47:34,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:34,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:47:34,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:47:34,357 INFO L87 Difference]: Start difference. First operand 347 states and 1033 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:34,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:34,687 INFO L93 Difference]: Finished difference Result 584 states and 1702 transitions. [2021-06-05 04:47:34,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:47:34,688 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:47:34,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:34,688 INFO L225 Difference]: With dead ends: 584 [2021-06-05 04:47:34,688 INFO L226 Difference]: Without dead ends: 574 [2021-06-05 04:47:34,689 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 270.4ms TimeCoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:47:34,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-06-05 04:47:34,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 354. [2021-06-05 04:47:34,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 2.9660056657223794) internal successors, (1047), 353 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:34,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 1047 transitions. [2021-06-05 04:47:34,693 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 1047 transitions. Word has length 22 [2021-06-05 04:47:34,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:34,693 INFO L482 AbstractCegarLoop]: Abstraction has 354 states and 1047 transitions. [2021-06-05 04:47:34,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:34,693 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 1047 transitions. [2021-06-05 04:47:34,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:47:34,694 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:34,694 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:34,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1704 [2021-06-05 04:47:34,901 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:34,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:34,901 INFO L82 PathProgramCache]: Analyzing trace with hash -205296464, now seen corresponding path program 163 times [2021-06-05 04:47:34,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:34,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188317303] [2021-06-05 04:47:34,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:34,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:34,965 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:34,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:34,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188317303] [2021-06-05 04:47:34,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188317303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:34,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521992125] [2021-06-05 04:47:34,965 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:35,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:35,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:47:35,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:35,150 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:35,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521992125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:35,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:35,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 04:47:35,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203611494] [2021-06-05 04:47:35,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:47:35,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:35,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:47:35,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:47:35,151 INFO L87 Difference]: Start difference. First operand 354 states and 1047 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:35,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:35,327 INFO L93 Difference]: Finished difference Result 488 states and 1444 transitions. [2021-06-05 04:47:35,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:47:35,327 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:47:35,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:35,328 INFO L225 Difference]: With dead ends: 488 [2021-06-05 04:47:35,328 INFO L226 Difference]: Without dead ends: 488 [2021-06-05 04:47:35,328 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 161.7ms TimeCoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:47:35,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-06-05 04:47:35,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 326. [2021-06-05 04:47:35,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.9476923076923076) internal successors, (958), 325 states have internal predecessors, (958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:35,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 958 transitions. [2021-06-05 04:47:35,332 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 958 transitions. Word has length 22 [2021-06-05 04:47:35,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:35,332 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 958 transitions. [2021-06-05 04:47:35,332 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:35,332 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 958 transitions. [2021-06-05 04:47:35,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:47:35,332 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:35,332 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:35,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1709 [2021-06-05 04:47:35,533 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:35,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:35,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1399002178, now seen corresponding path program 164 times [2021-06-05 04:47:35,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:35,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42516193] [2021-06-05 04:47:35,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:35,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:35,599 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:35,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:35,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42516193] [2021-06-05 04:47:35,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42516193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:35,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899844210] [2021-06-05 04:47:35,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:35,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:47:35,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:35,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:47:35,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:35,833 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:35,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899844210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:35,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:35,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:47:35,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118157616] [2021-06-05 04:47:35,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:47:35,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:35,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:47:35,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:47:35,834 INFO L87 Difference]: Start difference. First operand 326 states and 958 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:36,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:36,069 INFO L93 Difference]: Finished difference Result 508 states and 1483 transitions. [2021-06-05 04:47:36,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:47:36,069 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:47:36,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:36,070 INFO L225 Difference]: With dead ends: 508 [2021-06-05 04:47:36,070 INFO L226 Difference]: Without dead ends: 508 [2021-06-05 04:47:36,070 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 261.8ms TimeCoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:47:36,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-06-05 04:47:36,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 336. [2021-06-05 04:47:36,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 2.97910447761194) internal successors, (998), 335 states have internal predecessors, (998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:36,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 998 transitions. [2021-06-05 04:47:36,074 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 998 transitions. Word has length 22 [2021-06-05 04:47:36,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:36,074 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 998 transitions. [2021-06-05 04:47:36,074 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:36,074 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 998 transitions. [2021-06-05 04:47:36,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:47:36,074 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:36,074 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:36,275 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1712,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:36,275 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:36,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:36,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1401362154, now seen corresponding path program 165 times [2021-06-05 04:47:36,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:36,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617126532] [2021-06-05 04:47:36,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:36,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:36,338 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:36,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:36,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617126532] [2021-06-05 04:47:36,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617126532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:36,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099228499] [2021-06-05 04:47:36,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:36,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:47:36,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:36,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:47:36,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:36,560 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:36,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099228499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:36,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:36,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:47:36,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591822682] [2021-06-05 04:47:36,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:47:36,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:36,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:47:36,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:47:36,561 INFO L87 Difference]: Start difference. First operand 336 states and 998 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:36,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:36,892 INFO L93 Difference]: Finished difference Result 539 states and 1562 transitions. [2021-06-05 04:47:36,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:47:36,893 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:47:36,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:36,893 INFO L225 Difference]: With dead ends: 539 [2021-06-05 04:47:36,893 INFO L226 Difference]: Without dead ends: 529 [2021-06-05 04:47:36,893 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 320.4ms TimeCoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:47:36,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2021-06-05 04:47:36,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 333. [2021-06-05 04:47:36,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 2.9698795180722892) internal successors, (986), 332 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:36,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 986 transitions. [2021-06-05 04:47:36,897 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 986 transitions. Word has length 22 [2021-06-05 04:47:36,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:36,897 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 986 transitions. [2021-06-05 04:47:36,897 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:36,897 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 986 transitions. [2021-06-05 04:47:36,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:47:36,898 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:36,898 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:37,098 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1721 [2021-06-05 04:47:37,098 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:37,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:37,099 INFO L82 PathProgramCache]: Analyzing trace with hash -976414944, now seen corresponding path program 166 times [2021-06-05 04:47:37,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:37,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061685671] [2021-06-05 04:47:37,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:37,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:37,158 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:37,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:37,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061685671] [2021-06-05 04:47:37,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061685671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:37,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632773132] [2021-06-05 04:47:37,158 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:37,241 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:47:37,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:37,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:47:37,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:37,404 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:37,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632773132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:37,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:37,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:47:37,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233779509] [2021-06-05 04:47:37,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:47:37,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:37,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:47:37,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:47:37,405 INFO L87 Difference]: Start difference. First operand 333 states and 986 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:37,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:37,673 INFO L93 Difference]: Finished difference Result 500 states and 1460 transitions. [2021-06-05 04:47:37,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:47:37,674 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:47:37,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:37,674 INFO L225 Difference]: With dead ends: 500 [2021-06-05 04:47:37,674 INFO L226 Difference]: Without dead ends: 480 [2021-06-05 04:47:37,674 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 304.3ms TimeCoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:47:37,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2021-06-05 04:47:37,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 330. [2021-06-05 04:47:37,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.9604863221884496) internal successors, (974), 329 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:37,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 974 transitions. [2021-06-05 04:47:37,678 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 974 transitions. Word has length 22 [2021-06-05 04:47:37,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:37,678 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 974 transitions. [2021-06-05 04:47:37,678 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:37,678 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 974 transitions. [2021-06-05 04:47:37,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:47:37,679 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:37,679 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:37,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1730,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:37,879 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:37,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:37,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1791095814, now seen corresponding path program 167 times [2021-06-05 04:47:37,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:37,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169139050] [2021-06-05 04:47:37,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:37,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:37,954 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:37,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:37,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169139050] [2021-06-05 04:47:37,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169139050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:37,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15826469] [2021-06-05 04:47:37,955 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:38,048 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:47:38,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:38,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:47:38,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:38,204 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:38,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15826469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:38,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:38,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:47:38,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325368958] [2021-06-05 04:47:38,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:47:38,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:38,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:47:38,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:47:38,204 INFO L87 Difference]: Start difference. First operand 330 states and 974 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:38,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:38,566 INFO L93 Difference]: Finished difference Result 626 states and 1819 transitions. [2021-06-05 04:47:38,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:47:38,566 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:47:38,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:38,567 INFO L225 Difference]: With dead ends: 626 [2021-06-05 04:47:38,567 INFO L226 Difference]: Without dead ends: 626 [2021-06-05 04:47:38,567 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 331.6ms TimeCoverageRelationStatistics Valid=142, Invalid=364, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:47:38,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2021-06-05 04:47:38,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 340. [2021-06-05 04:47:38,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 3.0117994100294987) internal successors, (1021), 339 states have internal predecessors, (1021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:38,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1021 transitions. [2021-06-05 04:47:38,571 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1021 transitions. Word has length 22 [2021-06-05 04:47:38,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:38,571 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1021 transitions. [2021-06-05 04:47:38,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:38,571 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1021 transitions. [2021-06-05 04:47:38,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:47:38,572 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:38,572 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:38,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1739,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:38,772 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:38,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:38,772 INFO L82 PathProgramCache]: Analyzing trace with hash -296492850, now seen corresponding path program 168 times [2021-06-05 04:47:38,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:38,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971959462] [2021-06-05 04:47:38,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:38,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:38,837 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:38,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:38,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971959462] [2021-06-05 04:47:38,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971959462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:38,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125686302] [2021-06-05 04:47:38,838 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:38,916 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:47:38,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:38,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:47:38,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:39,077 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:39,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125686302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:39,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:39,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:47:39,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820644772] [2021-06-05 04:47:39,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:47:39,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:39,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:47:39,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:47:39,078 INFO L87 Difference]: Start difference. First operand 340 states and 1021 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:39,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:39,498 INFO L93 Difference]: Finished difference Result 668 states and 1921 transitions. [2021-06-05 04:47:39,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:47:39,498 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:47:39,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:39,499 INFO L225 Difference]: With dead ends: 668 [2021-06-05 04:47:39,499 INFO L226 Difference]: Without dead ends: 658 [2021-06-05 04:47:39,499 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 416.8ms TimeCoverageRelationStatistics Valid=166, Invalid=484, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:47:39,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2021-06-05 04:47:39,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 347. [2021-06-05 04:47:39,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 2.991329479768786) internal successors, (1035), 346 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:39,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1035 transitions. [2021-06-05 04:47:39,504 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1035 transitions. Word has length 22 [2021-06-05 04:47:39,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:39,504 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 1035 transitions. [2021-06-05 04:47:39,504 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:39,504 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1035 transitions. [2021-06-05 04:47:39,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:47:39,504 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:39,504 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:39,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1750 [2021-06-05 04:47:39,705 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:39,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:39,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1154039106, now seen corresponding path program 169 times [2021-06-05 04:47:39,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:39,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403105738] [2021-06-05 04:47:39,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:39,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:39,774 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:39,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:39,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403105738] [2021-06-05 04:47:39,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403105738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:39,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836366126] [2021-06-05 04:47:39,774 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:39,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:39,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:47:39,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:40,005 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:40,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836366126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:40,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:40,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:47:40,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524686330] [2021-06-05 04:47:40,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:47:40,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:40,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:47:40,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:47:40,006 INFO L87 Difference]: Start difference. First operand 347 states and 1035 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:40,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:40,218 INFO L93 Difference]: Finished difference Result 559 states and 1628 transitions. [2021-06-05 04:47:40,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:47:40,219 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:47:40,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:40,219 INFO L225 Difference]: With dead ends: 559 [2021-06-05 04:47:40,220 INFO L226 Difference]: Without dead ends: 559 [2021-06-05 04:47:40,220 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 234.9ms TimeCoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:47:40,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-06-05 04:47:40,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 338. [2021-06-05 04:47:40,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 2.9970326409495547) internal successors, (1010), 337 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:40,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1010 transitions. [2021-06-05 04:47:40,223 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1010 transitions. Word has length 22 [2021-06-05 04:47:40,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:40,224 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 1010 transitions. [2021-06-05 04:47:40,224 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:40,224 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1010 transitions. [2021-06-05 04:47:40,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:47:40,224 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:40,224 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:40,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1761 [2021-06-05 04:47:40,425 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:40,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:40,425 INFO L82 PathProgramCache]: Analyzing trace with hash -357980338, now seen corresponding path program 170 times [2021-06-05 04:47:40,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:40,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375396137] [2021-06-05 04:47:40,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:40,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:40,490 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:40,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:40,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375396137] [2021-06-05 04:47:40,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375396137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:40,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494648516] [2021-06-05 04:47:40,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:40,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:47:40,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:40,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:47:40,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:40,714 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:40,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494648516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:40,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:40,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:47:40,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026418999] [2021-06-05 04:47:40,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:47:40,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:40,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:47:40,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:47:40,715 INFO L87 Difference]: Start difference. First operand 338 states and 1010 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:40,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:40,931 INFO L93 Difference]: Finished difference Result 550 states and 1580 transitions. [2021-06-05 04:47:40,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:47:40,932 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:47:40,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:40,932 INFO L225 Difference]: With dead ends: 550 [2021-06-05 04:47:40,932 INFO L226 Difference]: Without dead ends: 541 [2021-06-05 04:47:40,932 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 215.6ms TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:47:40,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2021-06-05 04:47:40,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 344. [2021-06-05 04:47:40,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 2.979591836734694) internal successors, (1022), 343 states have internal predecessors, (1022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:40,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1022 transitions. [2021-06-05 04:47:40,936 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1022 transitions. Word has length 22 [2021-06-05 04:47:40,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:40,936 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 1022 transitions. [2021-06-05 04:47:40,937 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:40,937 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1022 transitions. [2021-06-05 04:47:40,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:47:40,937 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:40,937 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:41,139 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1773,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:41,139 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:41,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:41,139 INFO L82 PathProgramCache]: Analyzing trace with hash -580540704, now seen corresponding path program 171 times [2021-06-05 04:47:41,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:41,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565217347] [2021-06-05 04:47:41,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:41,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:41,211 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:41,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:41,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565217347] [2021-06-05 04:47:41,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565217347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:41,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937480465] [2021-06-05 04:47:41,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:41,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:47:41,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:41,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:47:41,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:41,428 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:41,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937480465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:41,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:41,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 04:47:41,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115385235] [2021-06-05 04:47:41,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:47:41,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:41,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:47:41,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:47:41,429 INFO L87 Difference]: Start difference. First operand 344 states and 1022 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:41,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:41,824 INFO L93 Difference]: Finished difference Result 617 states and 1746 transitions. [2021-06-05 04:47:41,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:47:41,825 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:47:41,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:41,825 INFO L225 Difference]: With dead ends: 617 [2021-06-05 04:47:41,825 INFO L226 Difference]: Without dead ends: 607 [2021-06-05 04:47:41,826 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 373.2ms TimeCoverageRelationStatistics Valid=139, Invalid=413, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:47:41,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-06-05 04:47:41,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 366. [2021-06-05 04:47:41,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 2.9753424657534246) internal successors, (1086), 365 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:41,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 1086 transitions. [2021-06-05 04:47:41,830 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 1086 transitions. Word has length 22 [2021-06-05 04:47:41,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:41,830 INFO L482 AbstractCegarLoop]: Abstraction has 366 states and 1086 transitions. [2021-06-05 04:47:41,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:41,830 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 1086 transitions. [2021-06-05 04:47:41,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:47:41,830 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:41,830 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:42,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1783 [2021-06-05 04:47:42,031 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:42,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:42,031 INFO L82 PathProgramCache]: Analyzing trace with hash -762631016, now seen corresponding path program 172 times [2021-06-05 04:47:42,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:42,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886459582] [2021-06-05 04:47:42,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:42,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:42,096 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:42,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:42,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886459582] [2021-06-05 04:47:42,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886459582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:42,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453812000] [2021-06-05 04:47:42,097 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:42,176 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:47:42,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:42,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:47:42,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:42,309 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:42,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453812000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:42,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:42,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 04:47:42,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410834417] [2021-06-05 04:47:42,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:47:42,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:42,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:47:42,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:47:42,310 INFO L87 Difference]: Start difference. First operand 366 states and 1086 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:42,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:42,651 INFO L93 Difference]: Finished difference Result 607 states and 1707 transitions. [2021-06-05 04:47:42,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:47:42,652 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:47:42,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:42,652 INFO L225 Difference]: With dead ends: 607 [2021-06-05 04:47:42,652 INFO L226 Difference]: Without dead ends: 595 [2021-06-05 04:47:42,653 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 331.2ms TimeCoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:47:42,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2021-06-05 04:47:42,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 346. [2021-06-05 04:47:42,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 2.973913043478261) internal successors, (1026), 345 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:42,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 1026 transitions. [2021-06-05 04:47:42,657 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 1026 transitions. Word has length 22 [2021-06-05 04:47:42,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:42,657 INFO L482 AbstractCegarLoop]: Abstraction has 346 states and 1026 transitions. [2021-06-05 04:47:42,657 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:42,657 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 1026 transitions. [2021-06-05 04:47:42,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:47:42,657 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:42,657 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:42,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1795 [2021-06-05 04:47:42,858 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:42,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:42,858 INFO L82 PathProgramCache]: Analyzing trace with hash -1191963826, now seen corresponding path program 173 times [2021-06-05 04:47:42,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:42,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517127638] [2021-06-05 04:47:42,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:42,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:42,915 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:42,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:42,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517127638] [2021-06-05 04:47:42,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517127638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:42,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073409433] [2021-06-05 04:47:42,915 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:42,995 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:47:42,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:42,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:47:42,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:43,149 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:43,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073409433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:43,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:43,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:47:43,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626208469] [2021-06-05 04:47:43,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:47:43,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:43,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:47:43,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:47:43,150 INFO L87 Difference]: Start difference. First operand 346 states and 1026 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:43,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:43,507 INFO L93 Difference]: Finished difference Result 475 states and 1390 transitions. [2021-06-05 04:47:43,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:47:43,508 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:47:43,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:43,508 INFO L225 Difference]: With dead ends: 475 [2021-06-05 04:47:43,508 INFO L226 Difference]: Without dead ends: 455 [2021-06-05 04:47:43,508 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 350.8ms TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:47:43,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2021-06-05 04:47:43,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 352. [2021-06-05 04:47:43,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 2.96011396011396) internal successors, (1039), 351 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:43,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 1039 transitions. [2021-06-05 04:47:43,512 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 1039 transitions. Word has length 22 [2021-06-05 04:47:43,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:43,512 INFO L482 AbstractCegarLoop]: Abstraction has 352 states and 1039 transitions. [2021-06-05 04:47:43,512 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:43,512 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 1039 transitions. [2021-06-05 04:47:43,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:47:43,513 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:43,513 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:43,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1808 [2021-06-05 04:47:43,714 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:43,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:43,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1753171094, now seen corresponding path program 174 times [2021-06-05 04:47:43,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:43,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966528149] [2021-06-05 04:47:43,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:43,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:43,773 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:43,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:43,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966528149] [2021-06-05 04:47:43,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966528149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:43,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245204333] [2021-06-05 04:47:43,774 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:43,854 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:47:43,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:43,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:47:43,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:44,044 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:44,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245204333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:44,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:44,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 04:47:44,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793598369] [2021-06-05 04:47:44,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:47:44,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:44,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:47:44,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:47:44,045 INFO L87 Difference]: Start difference. First operand 352 states and 1039 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:44,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:44,451 INFO L93 Difference]: Finished difference Result 553 states and 1568 transitions. [2021-06-05 04:47:44,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:47:44,451 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:47:44,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:44,452 INFO L225 Difference]: With dead ends: 553 [2021-06-05 04:47:44,452 INFO L226 Difference]: Without dead ends: 543 [2021-06-05 04:47:44,452 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 381.7ms TimeCoverageRelationStatistics Valid=120, Invalid=480, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:47:44,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-06-05 04:47:44,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 374. [2021-06-05 04:47:44,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 373 states have (on average 2.9571045576407506) internal successors, (1103), 373 states have internal predecessors, (1103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:44,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 1103 transitions. [2021-06-05 04:47:44,456 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 1103 transitions. Word has length 22 [2021-06-05 04:47:44,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:44,456 INFO L482 AbstractCegarLoop]: Abstraction has 374 states and 1103 transitions. [2021-06-05 04:47:44,456 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:44,456 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 1103 transitions. [2021-06-05 04:47:44,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:47:44,456 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:44,456 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:44,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1816,176 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:44,658 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:44,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:44,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1571080782, now seen corresponding path program 175 times [2021-06-05 04:47:44,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:44,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081203933] [2021-06-05 04:47:44,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:44,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:44,719 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:44,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:44,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081203933] [2021-06-05 04:47:44,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081203933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:44,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160058712] [2021-06-05 04:47:44,719 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:44,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:44,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:47:44,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:44,980 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:44,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160058712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:44,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:44,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 04:47:44,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812767180] [2021-06-05 04:47:44,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:47:44,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:44,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:47:44,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:47:44,981 INFO L87 Difference]: Start difference. First operand 374 states and 1103 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:45,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:45,262 INFO L93 Difference]: Finished difference Result 510 states and 1457 transitions. [2021-06-05 04:47:45,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:47:45,263 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:47:45,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:45,263 INFO L225 Difference]: With dead ends: 510 [2021-06-05 04:47:45,263 INFO L226 Difference]: Without dead ends: 495 [2021-06-05 04:47:45,264 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 295.3ms TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:47:45,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-06-05 04:47:45,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 348. [2021-06-05 04:47:45,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 2.968299711815562) internal successors, (1030), 347 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:45,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1030 transitions. [2021-06-05 04:47:45,269 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1030 transitions. Word has length 22 [2021-06-05 04:47:45,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:45,269 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 1030 transitions. [2021-06-05 04:47:45,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:45,269 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1030 transitions. [2021-06-05 04:47:45,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:47:45,270 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:45,270 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:45,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1827,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:45,473 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:45,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:45,473 INFO L82 PathProgramCache]: Analyzing trace with hash 861509322, now seen corresponding path program 176 times [2021-06-05 04:47:45,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:45,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780567110] [2021-06-05 04:47:45,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:45,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:45,538 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:45,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:45,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780567110] [2021-06-05 04:47:45,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780567110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:45,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742253956] [2021-06-05 04:47:45,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:45,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:47:45,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:45,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:47:45,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:45,739 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:45,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742253956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:45,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:45,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:47:45,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571727500] [2021-06-05 04:47:45,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:47:45,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:45,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:47:45,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:47:45,740 INFO L87 Difference]: Start difference. First operand 348 states and 1030 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:45,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:45,947 INFO L93 Difference]: Finished difference Result 491 states and 1418 transitions. [2021-06-05 04:47:45,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:47:45,947 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:47:45,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:45,948 INFO L225 Difference]: With dead ends: 491 [2021-06-05 04:47:45,948 INFO L226 Difference]: Without dead ends: 491 [2021-06-05 04:47:45,948 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 189.2ms TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:47:45,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-06-05 04:47:45,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 351. [2021-06-05 04:47:45,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 2.954285714285714) internal successors, (1034), 350 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:45,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1034 transitions. [2021-06-05 04:47:45,952 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1034 transitions. Word has length 22 [2021-06-05 04:47:45,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:45,952 INFO L482 AbstractCegarLoop]: Abstraction has 351 states and 1034 transitions. [2021-06-05 04:47:45,952 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:45,952 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1034 transitions. [2021-06-05 04:47:45,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:47:45,953 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:45,953 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:46,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1838,178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:46,153 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:46,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:46,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1938855010, now seen corresponding path program 177 times [2021-06-05 04:47:46,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:46,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124445310] [2021-06-05 04:47:46,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:46,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:46,216 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:46,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:46,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124445310] [2021-06-05 04:47:46,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124445310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:46,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978358918] [2021-06-05 04:47:46,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:46,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:47:46,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:46,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:47:46,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:46,423 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:46,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978358918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:46,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:46,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:47:46,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044356226] [2021-06-05 04:47:46,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:47:46,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:46,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:47:46,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:47:46,424 INFO L87 Difference]: Start difference. First operand 351 states and 1034 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:46,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:46,693 INFO L93 Difference]: Finished difference Result 522 states and 1494 transitions. [2021-06-05 04:47:46,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:47:46,694 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:47:46,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:46,694 INFO L225 Difference]: With dead ends: 522 [2021-06-05 04:47:46,694 INFO L226 Difference]: Without dead ends: 512 [2021-06-05 04:47:46,694 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 269.7ms TimeCoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:47:46,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-06-05 04:47:46,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 348. [2021-06-05 04:47:46,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 2.9452449567723344) internal successors, (1022), 347 states have internal predecessors, (1022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:46,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1022 transitions. [2021-06-05 04:47:46,698 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1022 transitions. Word has length 22 [2021-06-05 04:47:46,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:46,698 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 1022 transitions. [2021-06-05 04:47:46,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:46,698 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1022 transitions. [2021-06-05 04:47:46,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:47:46,699 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:46,699 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:46,899 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1843,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:46,899 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:46,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:46,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1513907800, now seen corresponding path program 178 times [2021-06-05 04:47:46,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:46,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966189948] [2021-06-05 04:47:46,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:46,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:46,958 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:46,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:46,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966189948] [2021-06-05 04:47:46,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966189948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:46,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969861466] [2021-06-05 04:47:46,958 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:47,040 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:47:47,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:47,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:47:47,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:47,185 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:47,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969861466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:47,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:47,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:47:47,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705055500] [2021-06-05 04:47:47,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:47:47,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:47,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:47:47,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:47:47,186 INFO L87 Difference]: Start difference. First operand 348 states and 1022 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:47,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:47,408 INFO L93 Difference]: Finished difference Result 473 states and 1378 transitions. [2021-06-05 04:47:47,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:47:47,408 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:47:47,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:47,409 INFO L225 Difference]: With dead ends: 473 [2021-06-05 04:47:47,409 INFO L226 Difference]: Without dead ends: 453 [2021-06-05 04:47:47,409 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 227.6ms TimeCoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:47:47,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-06-05 04:47:47,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 330. [2021-06-05 04:47:47,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.9483282674772036) internal successors, (970), 329 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:47,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 970 transitions. [2021-06-05 04:47:47,412 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 970 transitions. Word has length 22 [2021-06-05 04:47:47,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:47,413 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 970 transitions. [2021-06-05 04:47:47,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:47,413 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 970 transitions. [2021-06-05 04:47:47,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:47:47,413 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:47,413 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:47,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1848,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:47,613 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:47,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:47,614 INFO L82 PathProgramCache]: Analyzing trace with hash 193085434, now seen corresponding path program 179 times [2021-06-05 04:47:47,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:47,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587211819] [2021-06-05 04:47:47,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:47,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:47,684 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:47,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:47,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587211819] [2021-06-05 04:47:47,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587211819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:47,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752938615] [2021-06-05 04:47:47,684 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:47,766 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:47:47,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:47,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:47:47,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:47,886 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:47,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752938615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:47,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:47,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:47:47,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690620173] [2021-06-05 04:47:47,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:47:47,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:47,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:47:47,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:47:47,887 INFO L87 Difference]: Start difference. First operand 330 states and 970 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:48,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:48,083 INFO L93 Difference]: Finished difference Result 550 states and 1602 transitions. [2021-06-05 04:47:48,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:47:48,084 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:47:48,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:48,084 INFO L225 Difference]: With dead ends: 550 [2021-06-05 04:47:48,085 INFO L226 Difference]: Without dead ends: 550 [2021-06-05 04:47:48,085 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 214.1ms TimeCoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:47:48,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-06-05 04:47:48,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 342. [2021-06-05 04:47:48,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 2.9853372434017595) internal successors, (1018), 341 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:48,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1018 transitions. [2021-06-05 04:47:48,088 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1018 transitions. Word has length 22 [2021-06-05 04:47:48,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:48,089 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 1018 transitions. [2021-06-05 04:47:48,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:48,089 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1018 transitions. [2021-06-05 04:47:48,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:47:48,089 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:48,089 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:48,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1852 [2021-06-05 04:47:48,290 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:48,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:48,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1687688398, now seen corresponding path program 180 times [2021-06-05 04:47:48,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:48,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032539817] [2021-06-05 04:47:48,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:48,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:48,370 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:48,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:48,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032539817] [2021-06-05 04:47:48,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032539817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:48,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716577279] [2021-06-05 04:47:48,370 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:48,458 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:47:48,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:48,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:47:48,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:48,575 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:48,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716577279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:48,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:48,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:47:48,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109012868] [2021-06-05 04:47:48,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:47:48,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:48,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:47:48,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:47:48,576 INFO L87 Difference]: Start difference. First operand 342 states and 1018 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:48,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:48,926 INFO L93 Difference]: Finished difference Result 542 states and 1576 transitions. [2021-06-05 04:47:48,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:47:48,926 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:47:48,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:48,926 INFO L225 Difference]: With dead ends: 542 [2021-06-05 04:47:48,927 INFO L226 Difference]: Without dead ends: 532 [2021-06-05 04:47:48,927 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 307.0ms TimeCoverageRelationStatistics Valid=125, Invalid=427, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:47:48,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-06-05 04:47:48,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 349. [2021-06-05 04:47:48,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 2.9655172413793105) internal successors, (1032), 348 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:48,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1032 transitions. [2021-06-05 04:47:48,931 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1032 transitions. Word has length 22 [2021-06-05 04:47:48,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:48,931 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 1032 transitions. [2021-06-05 04:47:48,931 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:48,931 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1032 transitions. [2021-06-05 04:47:48,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:47:48,931 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:48,931 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:49,131 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1857,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:49,132 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:49,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:49,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1368576078, now seen corresponding path program 181 times [2021-06-05 04:47:49,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:49,132 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726228690] [2021-06-05 04:47:49,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:49,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:49,204 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:49,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:49,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726228690] [2021-06-05 04:47:49,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726228690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:49,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431251260] [2021-06-05 04:47:49,205 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:49,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:49,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:47:49,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:49,399 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:49,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431251260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:49,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:49,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 04:47:49,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859741083] [2021-06-05 04:47:49,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:47:49,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:49,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:47:49,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:47:49,400 INFO L87 Difference]: Start difference. First operand 349 states and 1032 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:49,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:49,591 INFO L93 Difference]: Finished difference Result 450 states and 1330 transitions. [2021-06-05 04:47:49,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:47:49,592 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:47:49,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:49,592 INFO L225 Difference]: With dead ends: 450 [2021-06-05 04:47:49,592 INFO L226 Difference]: Without dead ends: 450 [2021-06-05 04:47:49,592 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 194.7ms TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:47:49,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-06-05 04:47:49,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 327. [2021-06-05 04:47:49,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.9478527607361964) internal successors, (961), 326 states have internal predecessors, (961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:49,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 961 transitions. [2021-06-05 04:47:49,596 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 961 transitions. Word has length 22 [2021-06-05 04:47:49,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:49,596 INFO L482 AbstractCegarLoop]: Abstraction has 327 states and 961 transitions. [2021-06-05 04:47:49,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:49,596 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 961 transitions. [2021-06-05 04:47:49,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:47:49,596 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:49,596 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:49,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1863 [2021-06-05 04:47:49,797 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:49,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:49,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1160139342, now seen corresponding path program 182 times [2021-06-05 04:47:49,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:49,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848825840] [2021-06-05 04:47:49,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:49,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:49,869 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:49,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:49,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848825840] [2021-06-05 04:47:49,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848825840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:49,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303523889] [2021-06-05 04:47:49,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:49,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:47:49,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:49,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:47:49,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:50,099 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:50,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303523889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:50,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:50,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:47:50,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985922178] [2021-06-05 04:47:50,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:47:50,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:50,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:47:50,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:47:50,100 INFO L87 Difference]: Start difference. First operand 327 states and 961 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:50,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:50,395 INFO L93 Difference]: Finished difference Result 707 states and 2023 transitions. [2021-06-05 04:47:50,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:47:50,395 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:47:50,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:50,396 INFO L225 Difference]: With dead ends: 707 [2021-06-05 04:47:50,396 INFO L226 Difference]: Without dead ends: 707 [2021-06-05 04:47:50,396 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 299.5ms TimeCoverageRelationStatistics Valid=154, Invalid=352, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:47:50,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2021-06-05 04:47:50,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 341. [2021-06-05 04:47:50,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 3.011764705882353) internal successors, (1024), 340 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:50,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1024 transitions. [2021-06-05 04:47:50,400 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1024 transitions. Word has length 22 [2021-06-05 04:47:50,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:50,400 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1024 transitions. [2021-06-05 04:47:50,401 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:50,401 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1024 transitions. [2021-06-05 04:47:50,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:47:50,401 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:50,401 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:50,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1866,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:50,601 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:50,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:50,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1640224990, now seen corresponding path program 183 times [2021-06-05 04:47:50,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:50,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221887506] [2021-06-05 04:47:50,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:50,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:50,672 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:50,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:50,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221887506] [2021-06-05 04:47:50,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221887506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:50,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602138779] [2021-06-05 04:47:50,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:50,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:47:50,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:50,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:47:50,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:50,904 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:50,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602138779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:50,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:50,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:47:50,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888651779] [2021-06-05 04:47:50,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:47:50,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:50,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:47:50,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:47:50,906 INFO L87 Difference]: Start difference. First operand 341 states and 1024 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:51,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:51,139 INFO L93 Difference]: Finished difference Result 650 states and 1868 transitions. [2021-06-05 04:47:51,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:47:51,139 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:47:51,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:51,140 INFO L225 Difference]: With dead ends: 650 [2021-06-05 04:47:51,140 INFO L226 Difference]: Without dead ends: 640 [2021-06-05 04:47:51,140 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 228.0ms TimeCoverageRelationStatistics Valid=119, Invalid=301, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:47:51,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2021-06-05 04:47:51,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 348. [2021-06-05 04:47:51,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 2.9913544668587897) internal successors, (1038), 347 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:51,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1038 transitions. [2021-06-05 04:47:51,144 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1038 transitions. Word has length 22 [2021-06-05 04:47:51,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:51,144 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 1038 transitions. [2021-06-05 04:47:51,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:51,145 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1038 transitions. [2021-06-05 04:47:51,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:47:51,145 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:51,145 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:51,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1877 [2021-06-05 04:47:51,345 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:51,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:51,346 INFO L82 PathProgramCache]: Analyzing trace with hash -189693034, now seen corresponding path program 184 times [2021-06-05 04:47:51,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:51,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915614791] [2021-06-05 04:47:51,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:51,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:51,416 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:51,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:51,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915614791] [2021-06-05 04:47:51,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915614791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:51,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279413566] [2021-06-05 04:47:51,416 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:51,624 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:47:51,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:51,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:47:51,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:51,775 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:51,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279413566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:51,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:51,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:47:51,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384284664] [2021-06-05 04:47:51,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:47:51,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:51,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:47:51,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:47:51,776 INFO L87 Difference]: Start difference. First operand 348 states and 1038 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:51,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:51,956 INFO L93 Difference]: Finished difference Result 640 states and 1865 transitions. [2021-06-05 04:47:51,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:47:51,956 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:47:51,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:51,957 INFO L225 Difference]: With dead ends: 640 [2021-06-05 04:47:51,957 INFO L226 Difference]: Without dead ends: 640 [2021-06-05 04:47:51,957 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 228.4ms TimeCoverageRelationStatistics Valid=130, Invalid=290, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:47:51,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2021-06-05 04:47:51,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 354. [2021-06-05 04:47:51,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 3.0169971671388103) internal successors, (1065), 353 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:51,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 1065 transitions. [2021-06-05 04:47:51,961 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 1065 transitions. Word has length 22 [2021-06-05 04:47:51,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:51,961 INFO L482 AbstractCegarLoop]: Abstraction has 354 states and 1065 transitions. [2021-06-05 04:47:51,961 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:51,961 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 1065 transitions. [2021-06-05 04:47:51,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:47:51,962 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:51,962 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:52,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1889,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:52,162 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:52,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:52,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1701712478, now seen corresponding path program 185 times [2021-06-05 04:47:52,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:52,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499862226] [2021-06-05 04:47:52,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:52,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:52,231 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:52,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:52,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499862226] [2021-06-05 04:47:52,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499862226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:52,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785572933] [2021-06-05 04:47:52,231 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:52,314 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:47:52,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:52,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:47:52,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:52,456 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:52,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785572933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:52,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:52,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:47:52,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101500258] [2021-06-05 04:47:52,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:47:52,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:52,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:47:52,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:47:52,457 INFO L87 Difference]: Start difference. First operand 354 states and 1065 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:52,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:52,756 INFO L93 Difference]: Finished difference Result 631 states and 1817 transitions. [2021-06-05 04:47:52,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:47:52,756 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:47:52,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:52,757 INFO L225 Difference]: With dead ends: 631 [2021-06-05 04:47:52,757 INFO L226 Difference]: Without dead ends: 622 [2021-06-05 04:47:52,757 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 276.2ms TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:47:52,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2021-06-05 04:47:52,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 360. [2021-06-05 04:47:52,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 3.0) internal successors, (1077), 359 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:52,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 1077 transitions. [2021-06-05 04:47:52,761 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 1077 transitions. Word has length 22 [2021-06-05 04:47:52,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:52,761 INFO L482 AbstractCegarLoop]: Abstraction has 360 states and 1077 transitions. [2021-06-05 04:47:52,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:52,761 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 1077 transitions. [2021-06-05 04:47:52,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:47:52,762 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:52,762 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:52,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1898,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:52,962 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:52,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:52,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1924272844, now seen corresponding path program 186 times [2021-06-05 04:47:52,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:52,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876191816] [2021-06-05 04:47:52,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:52,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:53,028 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:53,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:53,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876191816] [2021-06-05 04:47:53,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876191816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:53,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519497878] [2021-06-05 04:47:53,028 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:53,111 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:47:53,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:53,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:47:53,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:53,247 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:53,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519497878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:53,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:53,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 04:47:53,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051598005] [2021-06-05 04:47:53,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:47:53,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:53,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:47:53,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:47:53,248 INFO L87 Difference]: Start difference. First operand 360 states and 1077 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:53,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:53,573 INFO L93 Difference]: Finished difference Result 593 states and 1708 transitions. [2021-06-05 04:47:53,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:47:53,573 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:47:53,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:53,574 INFO L225 Difference]: With dead ends: 593 [2021-06-05 04:47:53,574 INFO L226 Difference]: Without dead ends: 583 [2021-06-05 04:47:53,574 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 289.0ms TimeCoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:47:53,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2021-06-05 04:47:53,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 372. [2021-06-05 04:47:53,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 371 states have (on average 3.0053908355795147) internal successors, (1115), 371 states have internal predecessors, (1115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:53,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 1115 transitions. [2021-06-05 04:47:53,579 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 1115 transitions. Word has length 22 [2021-06-05 04:47:53,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:53,579 INFO L482 AbstractCegarLoop]: Abstraction has 372 states and 1115 transitions. [2021-06-05 04:47:53,579 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:53,580 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 1115 transitions. [2021-06-05 04:47:53,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:47:53,580 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:53,580 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:53,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1912,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:53,797 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:53,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:53,797 INFO L82 PathProgramCache]: Analyzing trace with hash -2106363156, now seen corresponding path program 187 times [2021-06-05 04:47:53,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:53,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416678544] [2021-06-05 04:47:53,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:53,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:53,879 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:53,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:53,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416678544] [2021-06-05 04:47:53,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416678544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:53,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904136417] [2021-06-05 04:47:53,879 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:53,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:53,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:47:53,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:54,110 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:54,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904136417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:54,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:54,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 04:47:54,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300495465] [2021-06-05 04:47:54,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:47:54,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:54,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:47:54,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:47:54,111 INFO L87 Difference]: Start difference. First operand 372 states and 1115 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:54,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:54,392 INFO L93 Difference]: Finished difference Result 624 states and 1771 transitions. [2021-06-05 04:47:54,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:47:54,392 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:47:54,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:54,393 INFO L225 Difference]: With dead ends: 624 [2021-06-05 04:47:54,393 INFO L226 Difference]: Without dead ends: 612 [2021-06-05 04:47:54,393 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 252.8ms TimeCoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:47:54,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-06-05 04:47:54,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 368. [2021-06-05 04:47:54,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 3.005449591280654) internal successors, (1103), 367 states have internal predecessors, (1103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:54,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 1103 transitions. [2021-06-05 04:47:54,397 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 1103 transitions. Word has length 22 [2021-06-05 04:47:54,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:54,397 INFO L482 AbstractCegarLoop]: Abstraction has 368 states and 1103 transitions. [2021-06-05 04:47:54,397 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:54,397 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 1103 transitions. [2021-06-05 04:47:54,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:47:54,398 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:54,398 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:54,598 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1925,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:54,598 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:54,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:54,599 INFO L82 PathProgramCache]: Analyzing trace with hash 311516870, now seen corresponding path program 188 times [2021-06-05 04:47:54,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:54,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735586967] [2021-06-05 04:47:54,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:54,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:54,675 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:54,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:54,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735586967] [2021-06-05 04:47:54,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735586967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:54,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014617276] [2021-06-05 04:47:54,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:54,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:47:54,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:54,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:47:54,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:54,912 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:54,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014617276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:54,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:54,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:47:54,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880856118] [2021-06-05 04:47:54,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:47:54,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:54,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:47:54,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:47:54,912 INFO L87 Difference]: Start difference. First operand 368 states and 1103 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:55,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:55,173 INFO L93 Difference]: Finished difference Result 590 states and 1715 transitions. [2021-06-05 04:47:55,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:47:55,174 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:47:55,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:55,174 INFO L225 Difference]: With dead ends: 590 [2021-06-05 04:47:55,174 INFO L226 Difference]: Without dead ends: 590 [2021-06-05 04:47:55,174 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 258.0ms TimeCoverageRelationStatistics Valid=128, Invalid=334, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:47:55,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2021-06-05 04:47:55,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 373. [2021-06-05 04:47:55,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 372 states have (on average 3.0) internal successors, (1116), 372 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:55,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 1116 transitions. [2021-06-05 04:47:55,179 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 1116 transitions. Word has length 22 [2021-06-05 04:47:55,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:55,179 INFO L482 AbstractCegarLoop]: Abstraction has 373 states and 1116 transitions. [2021-06-05 04:47:55,179 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:55,179 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 1116 transitions. [2021-06-05 04:47:55,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:47:55,179 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:55,179 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:55,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1936 [2021-06-05 04:47:55,380 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:55,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:55,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1806119834, now seen corresponding path program 189 times [2021-06-05 04:47:55,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:55,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89159606] [2021-06-05 04:47:55,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:55,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:55,462 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:55,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:55,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89159606] [2021-06-05 04:47:55,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89159606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:55,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609580480] [2021-06-05 04:47:55,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:55,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:47:55,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:55,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:47:55,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:55,678 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:55,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609580480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:55,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:55,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:47:55,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928566497] [2021-06-05 04:47:55,678 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:47:55,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:55,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:47:55,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:47:55,678 INFO L87 Difference]: Start difference. First operand 373 states and 1116 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:55,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:55,931 INFO L93 Difference]: Finished difference Result 566 states and 1650 transitions. [2021-06-05 04:47:55,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:47:55,931 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:47:55,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:55,932 INFO L225 Difference]: With dead ends: 566 [2021-06-05 04:47:55,932 INFO L226 Difference]: Without dead ends: 556 [2021-06-05 04:47:55,932 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 238.6ms TimeCoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:47:55,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2021-06-05 04:47:55,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 352. [2021-06-05 04:47:55,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 2.9715099715099713) internal successors, (1043), 351 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:55,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 1043 transitions. [2021-06-05 04:47:55,936 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 1043 transitions. Word has length 22 [2021-06-05 04:47:55,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:55,936 INFO L482 AbstractCegarLoop]: Abstraction has 352 states and 1043 transitions. [2021-06-05 04:47:55,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:55,936 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 1043 transitions. [2021-06-05 04:47:55,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:47:55,937 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:55,937 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:56,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1945,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:56,137 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:56,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:56,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1259786134, now seen corresponding path program 190 times [2021-06-05 04:47:56,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:56,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132085702] [2021-06-05 04:47:56,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:56,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:56,211 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:56,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:56,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132085702] [2021-06-05 04:47:56,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132085702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:56,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183503765] [2021-06-05 04:47:56,212 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:56,299 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:47:56,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:56,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:47:56,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:56,421 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:56,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183503765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:56,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:56,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 04:47:56,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168945269] [2021-06-05 04:47:56,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:47:56,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:56,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:47:56,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:47:56,422 INFO L87 Difference]: Start difference. First operand 352 states and 1043 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:56,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:56,634 INFO L93 Difference]: Finished difference Result 495 states and 1468 transitions. [2021-06-05 04:47:56,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:47:56,635 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:47:56,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:56,635 INFO L225 Difference]: With dead ends: 495 [2021-06-05 04:47:56,635 INFO L226 Difference]: Without dead ends: 495 [2021-06-05 04:47:56,635 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 227.9ms TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:47:56,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-06-05 04:47:56,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 349. [2021-06-05 04:47:56,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 2.971264367816092) internal successors, (1034), 348 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:56,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1034 transitions. [2021-06-05 04:47:56,644 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1034 transitions. Word has length 22 [2021-06-05 04:47:56,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:56,644 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 1034 transitions. [2021-06-05 04:47:56,644 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:56,644 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1034 transitions. [2021-06-05 04:47:56,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:47:56,644 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:56,645 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:56,845 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1954,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:56,845 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:56,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:56,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1983718082, now seen corresponding path program 191 times [2021-06-05 04:47:56,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:56,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258495640] [2021-06-05 04:47:56,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:56,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:56,941 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:56,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:56,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258495640] [2021-06-05 04:47:56,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258495640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:56,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143869521] [2021-06-05 04:47:56,942 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:57,050 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:47:57,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:57,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:47:57,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:57,212 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:57,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143869521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:57,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:57,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:47:57,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836496071] [2021-06-05 04:47:57,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:47:57,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:57,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:47:57,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:47:57,213 INFO L87 Difference]: Start difference. First operand 349 states and 1034 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:57,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:57,422 INFO L93 Difference]: Finished difference Result 544 states and 1562 transitions. [2021-06-05 04:47:57,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:47:57,422 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:47:57,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:57,423 INFO L225 Difference]: With dead ends: 544 [2021-06-05 04:47:57,423 INFO L226 Difference]: Without dead ends: 544 [2021-06-05 04:47:57,423 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 276.0ms TimeCoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:47:57,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-06-05 04:47:57,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 357. [2021-06-05 04:47:57,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 2.9831460674157304) internal successors, (1062), 356 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:57,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 1062 transitions. [2021-06-05 04:47:57,427 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 1062 transitions. Word has length 22 [2021-06-05 04:47:57,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:57,427 INFO L482 AbstractCegarLoop]: Abstraction has 357 states and 1062 transitions. [2021-06-05 04:47:57,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:57,427 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 1062 transitions. [2021-06-05 04:47:57,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:47:57,427 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:57,427 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:57,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1960 [2021-06-05 04:47:57,628 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:57,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:57,628 INFO L82 PathProgramCache]: Analyzing trace with hash 471698638, now seen corresponding path program 192 times [2021-06-05 04:47:57,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:57,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880119322] [2021-06-05 04:47:57,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:57,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:57,706 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:57,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:57,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880119322] [2021-06-05 04:47:57,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880119322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:57,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289501554] [2021-06-05 04:47:57,706 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:57,795 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:47:57,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:57,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:47:57,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:57,958 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:57,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289501554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:57,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:57,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:47:57,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645113539] [2021-06-05 04:47:57,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:47:57,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:57,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:47:57,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:47:57,959 INFO L87 Difference]: Start difference. First operand 357 states and 1062 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:58,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:58,262 INFO L93 Difference]: Finished difference Result 490 states and 1410 transitions. [2021-06-05 04:47:58,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:47:58,262 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:47:58,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:58,263 INFO L225 Difference]: With dead ends: 490 [2021-06-05 04:47:58,263 INFO L226 Difference]: Without dead ends: 481 [2021-06-05 04:47:58,263 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 338.4ms TimeCoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:47:58,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-06-05 04:47:58,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 357. [2021-06-05 04:47:58,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 2.955056179775281) internal successors, (1052), 356 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:58,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 1052 transitions. [2021-06-05 04:47:58,266 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 1052 transitions. Word has length 22 [2021-06-05 04:47:58,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:58,267 INFO L482 AbstractCegarLoop]: Abstraction has 357 states and 1052 transitions. [2021-06-05 04:47:58,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:58,267 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 1052 transitions. [2021-06-05 04:47:58,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:47:58,267 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:58,267 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:58,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1965,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:58,468 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:58,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:58,468 INFO L82 PathProgramCache]: Analyzing trace with hash 293775178, now seen corresponding path program 193 times [2021-06-05 04:47:58,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:58,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070289941] [2021-06-05 04:47:58,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:58,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:58,542 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:58,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:58,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070289941] [2021-06-05 04:47:58,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070289941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:58,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198156933] [2021-06-05 04:47:58,542 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:58,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:58,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:47:58,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:58,767 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:58,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198156933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:58,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:58,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 04:47:58,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794410954] [2021-06-05 04:47:58,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:47:58,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:58,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:47:58,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:47:58,768 INFO L87 Difference]: Start difference. First operand 357 states and 1052 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:59,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:59,010 INFO L93 Difference]: Finished difference Result 454 states and 1342 transitions. [2021-06-05 04:47:59,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:47:59,011 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:47:59,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:59,011 INFO L225 Difference]: With dead ends: 454 [2021-06-05 04:47:59,011 INFO L226 Difference]: Without dead ends: 454 [2021-06-05 04:47:59,011 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 249.5ms TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:47:59,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-06-05 04:47:59,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 324. [2021-06-05 04:47:59,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.9473684210526314) internal successors, (952), 323 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:59,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 952 transitions. [2021-06-05 04:47:59,015 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 952 transitions. Word has length 22 [2021-06-05 04:47:59,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:59,015 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 952 transitions. [2021-06-05 04:47:59,015 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:59,015 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 952 transitions. [2021-06-05 04:47:59,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:47:59,015 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:59,015 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:59,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1970 [2021-06-05 04:47:59,216 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:59,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:59,216 INFO L82 PathProgramCache]: Analyzing trace with hash 483357642, now seen corresponding path program 194 times [2021-06-05 04:47:59,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:59,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285983114] [2021-06-05 04:47:59,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:59,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:59,255 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:47:59,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:59,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285983114] [2021-06-05 04:47:59,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285983114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:59,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593714910] [2021-06-05 04:47:59,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:59,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:47:59,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:59,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:47:59,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:59,444 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:59,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593714910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:59,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:59,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 04:47:59,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178480827] [2021-06-05 04:47:59,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:47:59,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:59,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:47:59,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:47:59,445 INFO L87 Difference]: Start difference. First operand 324 states and 952 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:00,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:48:00,015 INFO L93 Difference]: Finished difference Result 716 states and 2103 transitions. [2021-06-05 04:48:00,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 04:48:00,016 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:48:00,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:48:00,016 INFO L225 Difference]: With dead ends: 716 [2021-06-05 04:48:00,016 INFO L226 Difference]: Without dead ends: 614 [2021-06-05 04:48:00,017 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 322.0ms TimeCoverageRelationStatistics Valid=229, Invalid=827, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:48:00,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2021-06-05 04:48:00,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 309. [2021-06-05 04:48:00,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.9448051948051948) internal successors, (907), 308 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:00,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 907 transitions. [2021-06-05 04:48:00,020 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 907 transitions. Word has length 22 [2021-06-05 04:48:00,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:48:00,020 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 907 transitions. [2021-06-05 04:48:00,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:00,020 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 907 transitions. [2021-06-05 04:48:00,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:48:00,021 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:48:00,021 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:48:00,221 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1974,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:00,221 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:48:00,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:48:00,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1787383922, now seen corresponding path program 195 times [2021-06-05 04:48:00,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:48:00,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565352277] [2021-06-05 04:48:00,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:48:00,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:00,276 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:48:00,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:48:00,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565352277] [2021-06-05 04:48:00,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565352277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:00,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749715541] [2021-06-05 04:48:00,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:00,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:48:00,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:48:00,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:48:00,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:48:00,478 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:48:00,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749715541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:00,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:48:00,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 04:48:00,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262699594] [2021-06-05 04:48:00,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:48:00,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:48:00,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:48:00,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:48:00,479 INFO L87 Difference]: Start difference. First operand 309 states and 907 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:00,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:48:00,603 INFO L93 Difference]: Finished difference Result 627 states and 1817 transitions. [2021-06-05 04:48:00,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:48:00,603 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:48:00,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:48:00,604 INFO L225 Difference]: With dead ends: 627 [2021-06-05 04:48:00,604 INFO L226 Difference]: Without dead ends: 576 [2021-06-05 04:48:00,604 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 134.0ms TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:48:00,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2021-06-05 04:48:00,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 329. [2021-06-05 04:48:00,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 3.0091463414634148) internal successors, (987), 328 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:00,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 987 transitions. [2021-06-05 04:48:00,608 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 987 transitions. Word has length 22 [2021-06-05 04:48:00,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:48:00,608 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 987 transitions. [2021-06-05 04:48:00,608 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:00,608 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 987 transitions. [2021-06-05 04:48:00,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:48:00,608 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:48:00,608 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:48:00,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1977 [2021-06-05 04:48:00,809 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:48:00,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:48:00,809 INFO L82 PathProgramCache]: Analyzing trace with hash -772869444, now seen corresponding path program 196 times [2021-06-05 04:48:00,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:48:00,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031544678] [2021-06-05 04:48:00,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:48:00,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:00,859 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:48:00,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:48:00,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031544678] [2021-06-05 04:48:00,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031544678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:00,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807136022] [2021-06-05 04:48:00,859 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:00,945 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:48:00,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:48:00,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:48:00,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:48:01,091 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:01,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807136022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:01,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:48:01,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 04:48:01,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31367819] [2021-06-05 04:48:01,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:48:01,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:48:01,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:48:01,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:48:01,092 INFO L87 Difference]: Start difference. First operand 329 states and 987 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:01,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:48:01,924 INFO L93 Difference]: Finished difference Result 999 states and 2873 transitions. [2021-06-05 04:48:01,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 04:48:01,924 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:48:01,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:48:01,925 INFO L225 Difference]: With dead ends: 999 [2021-06-05 04:48:01,925 INFO L226 Difference]: Without dead ends: 858 [2021-06-05 04:48:01,926 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 649.7ms TimeCoverageRelationStatistics Valid=322, Invalid=1238, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 04:48:01,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 858 states. [2021-06-05 04:48:01,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 858 to 339. [2021-06-05 04:48:01,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 2.9792899408284024) internal successors, (1007), 338 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:01,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1007 transitions. [2021-06-05 04:48:01,932 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1007 transitions. Word has length 22 [2021-06-05 04:48:01,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:48:01,932 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 1007 transitions. [2021-06-05 04:48:01,932 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:01,932 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1007 transitions. [2021-06-05 04:48:01,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:48:01,932 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:48:01,933 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:48:02,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1988,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:02,137 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:48:02,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:48:02,137 INFO L82 PathProgramCache]: Analyzing trace with hash 400799254, now seen corresponding path program 197 times [2021-06-05 04:48:02,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:48:02,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747462059] [2021-06-05 04:48:02,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:48:02,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:02,187 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:48:02,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:48:02,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747462059] [2021-06-05 04:48:02,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747462059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:02,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693970258] [2021-06-05 04:48:02,188 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:02,274 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:48:02,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:48:02,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:48:02,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:48:02,407 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:02,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693970258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:02,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:48:02,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 04:48:02,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517437176] [2021-06-05 04:48:02,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:48:02,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:48:02,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:48:02,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:48:02,408 INFO L87 Difference]: Start difference. First operand 339 states and 1007 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:03,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:48:03,030 INFO L93 Difference]: Finished difference Result 816 states and 2373 transitions. [2021-06-05 04:48:03,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 04:48:03,031 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:48:03,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:48:03,032 INFO L225 Difference]: With dead ends: 816 [2021-06-05 04:48:03,032 INFO L226 Difference]: Without dead ends: 714 [2021-06-05 04:48:03,032 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 461.6ms TimeCoverageRelationStatistics Valid=267, Invalid=923, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 04:48:03,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2021-06-05 04:48:03,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 304. [2021-06-05 04:48:03,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.943894389438944) internal successors, (892), 303 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:03,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 892 transitions. [2021-06-05 04:48:03,036 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 892 transitions. Word has length 22 [2021-06-05 04:48:03,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:48:03,036 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 892 transitions. [2021-06-05 04:48:03,036 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:03,036 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 892 transitions. [2021-06-05 04:48:03,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:48:03,036 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:48:03,036 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:48:03,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1993,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:03,237 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:48:03,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:48:03,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1757356874, now seen corresponding path program 198 times [2021-06-05 04:48:03,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:48:03,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569800722] [2021-06-05 04:48:03,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:48:03,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:03,314 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:03,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:48:03,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569800722] [2021-06-05 04:48:03,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569800722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:03,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715704552] [2021-06-05 04:48:03,315 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:03,403 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:48:03,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:48:03,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:48:03,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:48:03,572 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:03,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715704552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:03,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:48:03,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:48:03,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087077661] [2021-06-05 04:48:03,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:48:03,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:48:03,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:48:03,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:48:03,573 INFO L87 Difference]: Start difference. First operand 304 states and 892 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:03,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:48:03,940 INFO L93 Difference]: Finished difference Result 674 states and 1948 transitions. [2021-06-05 04:48:03,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:48:03,940 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:48:03,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:48:03,941 INFO L225 Difference]: With dead ends: 674 [2021-06-05 04:48:03,941 INFO L226 Difference]: Without dead ends: 607 [2021-06-05 04:48:03,941 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 314.1ms TimeCoverageRelationStatistics Valid=201, Invalid=555, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:48:03,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-06-05 04:48:03,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 325. [2021-06-05 04:48:03,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.990740740740741) internal successors, (969), 324 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:03,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 969 transitions. [2021-06-05 04:48:03,947 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 969 transitions. Word has length 22 [2021-06-05 04:48:03,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:48:03,947 INFO L482 AbstractCegarLoop]: Abstraction has 325 states and 969 transitions. [2021-06-05 04:48:03,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:03,947 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 969 transitions. [2021-06-05 04:48:03,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:48:03,947 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:48:03,947 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:48:04,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2000,200 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:04,161 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:48:04,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:48:04,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1523095944, now seen corresponding path program 199 times [2021-06-05 04:48:04,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:48:04,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126270822] [2021-06-05 04:48:04,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:48:04,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:04,250 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:04,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:48:04,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126270822] [2021-06-05 04:48:04,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126270822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:04,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147387987] [2021-06-05 04:48:04,250 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:04,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:04,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:48:04,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:48:04,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:04,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:04,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:48:04,478 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:04,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:04,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:04,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:48:04,496 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:04,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:04,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:04,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:48:04,500 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:04,502 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:04,503 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:04,529 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:48:04,531 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 04:48:04,531 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:130, output treesize:51 [2021-06-05 04:48:04,643 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:04,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147387987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:04,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:48:04,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:48:04,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833246595] [2021-06-05 04:48:04,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:48:04,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:48:04,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:48:04,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:48:04,644 INFO L87 Difference]: Start difference. First operand 325 states and 969 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:05,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:48:05,184 INFO L93 Difference]: Finished difference Result 724 states and 2053 transitions. [2021-06-05 04:48:05,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:48:05,184 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:48:05,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:48:05,185 INFO L225 Difference]: With dead ends: 724 [2021-06-05 04:48:05,185 INFO L226 Difference]: Without dead ends: 628 [2021-06-05 04:48:05,185 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 510.4ms TimeCoverageRelationStatistics Valid=158, Invalid=598, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:48:05,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2021-06-05 04:48:05,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 318. [2021-06-05 04:48:05,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 2.968454258675079) internal successors, (941), 317 states have internal predecessors, (941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:05,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 941 transitions. [2021-06-05 04:48:05,189 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 941 transitions. Word has length 22 [2021-06-05 04:48:05,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:48:05,189 INFO L482 AbstractCegarLoop]: Abstraction has 318 states and 941 transitions. [2021-06-05 04:48:05,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:05,189 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 941 transitions. [2021-06-05 04:48:05,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:48:05,189 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:48:05,189 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:48:05,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2022,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:05,390 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:48:05,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:48:05,390 INFO L82 PathProgramCache]: Analyzing trace with hash -2110841266, now seen corresponding path program 200 times [2021-06-05 04:48:05,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:48:05,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141519041] [2021-06-05 04:48:05,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:48:05,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:05,516 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:05,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:48:05,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141519041] [2021-06-05 04:48:05,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141519041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:05,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213198758] [2021-06-05 04:48:05,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:05,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:48:05,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:48:05,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:48:05,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:48:05,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:05,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:05,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:48:05,778 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:05,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:05,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:05,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:48:05,782 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:05,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:05,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:05,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:48:05,788 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:05,790 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:05,791 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:05,817 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:48:05,819 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 04:48:05,819 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:130, output treesize:51 [2021-06-05 04:48:05,923 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:05,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213198758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:05,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:48:05,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-06-05 04:48:05,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652591064] [2021-06-05 04:48:05,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:48:05,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:48:05,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:48:05,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:48:05,924 INFO L87 Difference]: Start difference. First operand 318 states and 941 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:06,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:48:06,311 INFO L93 Difference]: Finished difference Result 418 states and 1234 transitions. [2021-06-05 04:48:06,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:48:06,311 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:48:06,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:48:06,312 INFO L225 Difference]: With dead ends: 418 [2021-06-05 04:48:06,312 INFO L226 Difference]: Without dead ends: 400 [2021-06-05 04:48:06,312 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 447.9ms TimeCoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:48:06,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-06-05 04:48:06,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 326. [2021-06-05 04:48:06,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.9692307692307693) internal successors, (965), 325 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:06,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 965 transitions. [2021-06-05 04:48:06,315 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 965 transitions. Word has length 22 [2021-06-05 04:48:06,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:48:06,315 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 965 transitions. [2021-06-05 04:48:06,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:06,315 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 965 transitions. [2021-06-05 04:48:06,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:48:06,316 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:48:06,316 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:48:06,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2056 [2021-06-05 04:48:06,516 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:48:06,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:48:06,516 INFO L82 PathProgramCache]: Analyzing trace with hash 871558594, now seen corresponding path program 201 times [2021-06-05 04:48:06,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:48:06,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689888397] [2021-06-05 04:48:06,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:48:06,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:06,591 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:06,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:48:06,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689888397] [2021-06-05 04:48:06,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689888397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:06,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387881344] [2021-06-05 04:48:06,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:06,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:48:06,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:48:06,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:48:06,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:48:06,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:06,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:48:06,772 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:06,786 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:48:06,792 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-05 04:48:06,792 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:34 [2021-06-05 04:48:07,080 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:07,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387881344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:07,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:48:07,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:48:07,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644350451] [2021-06-05 04:48:07,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:48:07,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:48:07,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:48:07,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:48:07,081 INFO L87 Difference]: Start difference. First operand 326 states and 965 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:07,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:48:07,393 INFO L93 Difference]: Finished difference Result 774 states and 2239 transitions. [2021-06-05 04:48:07,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:48:07,393 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:48:07,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:48:07,394 INFO L225 Difference]: With dead ends: 774 [2021-06-05 04:48:07,394 INFO L226 Difference]: Without dead ends: 707 [2021-06-05 04:48:07,394 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 255.4ms TimeCoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:48:07,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2021-06-05 04:48:07,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 354. [2021-06-05 04:48:07,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 3.0509915014164304) internal successors, (1077), 353 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:07,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 1077 transitions. [2021-06-05 04:48:07,399 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 1077 transitions. Word has length 22 [2021-06-05 04:48:07,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:48:07,399 INFO L482 AbstractCegarLoop]: Abstraction has 354 states and 1077 transitions. [2021-06-05 04:48:07,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:07,399 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 1077 transitions. [2021-06-05 04:48:07,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:48:07,402 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:48:07,402 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:48:07,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2085,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:07,625 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:48:07,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:48:07,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1886073072, now seen corresponding path program 202 times [2021-06-05 04:48:07,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:48:07,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715370350] [2021-06-05 04:48:07,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:48:07,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:07,703 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:48:07,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:48:07,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715370350] [2021-06-05 04:48:07,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715370350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:07,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270195606] [2021-06-05 04:48:07,704 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:07,792 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:48:07,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:48:07,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:48:07,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:48:07,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:07,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:48:07,891 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:07,905 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:48:07,907 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-05 04:48:07,907 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:32 [2021-06-05 04:48:08,125 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:08,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270195606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:08,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:48:08,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 04:48:08,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959507778] [2021-06-05 04:48:08,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:48:08,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:48:08,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:48:08,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:48:08,126 INFO L87 Difference]: Start difference. First operand 354 states and 1077 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:08,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:48:08,479 INFO L93 Difference]: Finished difference Result 702 states and 2030 transitions. [2021-06-05 04:48:08,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:48:08,479 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:48:08,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:48:08,480 INFO L225 Difference]: With dead ends: 702 [2021-06-05 04:48:08,480 INFO L226 Difference]: Without dead ends: 606 [2021-06-05 04:48:08,480 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 244.0ms TimeCoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:48:08,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2021-06-05 04:48:08,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 367. [2021-06-05 04:48:08,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 366 states have (on average 3.010928961748634) internal successors, (1102), 366 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:08,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 1102 transitions. [2021-06-05 04:48:08,485 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 1102 transitions. Word has length 22 [2021-06-05 04:48:08,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:48:08,486 INFO L482 AbstractCegarLoop]: Abstraction has 367 states and 1102 transitions. [2021-06-05 04:48:08,486 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:08,486 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 1102 transitions. [2021-06-05 04:48:08,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:48:08,486 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:48:08,486 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:48:08,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2172,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:08,697 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:48:08,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:48:08,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1235225526, now seen corresponding path program 203 times [2021-06-05 04:48:08,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:48:08,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726681362] [2021-06-05 04:48:08,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:48:08,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:08,770 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:08,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:48:08,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726681362] [2021-06-05 04:48:08,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726681362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:08,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069328496] [2021-06-05 04:48:08,771 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:08,860 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:48:08,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:48:08,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:48:08,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:48:08,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:08,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:48:08,953 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:08,964 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:48:08,965 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-05 04:48:08,965 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:30 [2021-06-05 04:48:09,036 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:09,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069328496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:09,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:48:09,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:48:09,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560399636] [2021-06-05 04:48:09,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:48:09,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:48:09,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:48:09,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:48:09,037 INFO L87 Difference]: Start difference. First operand 367 states and 1102 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:09,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:48:09,482 INFO L93 Difference]: Finished difference Result 533 states and 1563 transitions. [2021-06-05 04:48:09,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:48:09,482 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:48:09,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:48:09,483 INFO L225 Difference]: With dead ends: 533 [2021-06-05 04:48:09,483 INFO L226 Difference]: Without dead ends: 466 [2021-06-05 04:48:09,483 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 315.3ms TimeCoverageRelationStatistics Valid=144, Invalid=558, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:48:09,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-06-05 04:48:09,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 323. [2021-06-05 04:48:09,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.968944099378882) internal successors, (956), 322 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:09,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 956 transitions. [2021-06-05 04:48:09,486 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 956 transitions. Word has length 22 [2021-06-05 04:48:09,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:48:09,487 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 956 transitions. [2021-06-05 04:48:09,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:09,487 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 956 transitions. [2021-06-05 04:48:09,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:48:09,487 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:48:09,487 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:48:09,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2228,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:09,687 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:48:09,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:48:09,688 INFO L82 PathProgramCache]: Analyzing trace with hash 343747060, now seen corresponding path program 204 times [2021-06-05 04:48:09,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:48:09,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3056326] [2021-06-05 04:48:09,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:48:09,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:09,818 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:09,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:48:09,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3056326] [2021-06-05 04:48:09,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3056326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:09,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099046346] [2021-06-05 04:48:09,818 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:09,912 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:48:09,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:48:09,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:48:09,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:48:10,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:10,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:10,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:48:10,205 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:10,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:10,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:10,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:48:10,209 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:10,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:10,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:10,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:48:10,215 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:10,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:10,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:48:10,220 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:10,295 INFO L628 ElimStorePlain]: treesize reduction 20, result has 79.6 percent of original size [2021-06-05 04:48:10,297 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 4 xjuncts. [2021-06-05 04:48:10,297 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:177, output treesize:78 [2021-06-05 04:48:10,470 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:10,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099046346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:10,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:48:10,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-06-05 04:48:10,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741909705] [2021-06-05 04:48:10,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:48:10,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:48:10,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:48:10,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:48:10,471 INFO L87 Difference]: Start difference. First operand 323 states and 956 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:10,925 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2021-06-05 04:48:11,124 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-06-05 04:48:11,258 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 38 [2021-06-05 04:48:11,577 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2021-06-05 04:48:11,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:48:11,615 INFO L93 Difference]: Finished difference Result 585 states and 1689 transitions. [2021-06-05 04:48:11,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:48:11,615 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:48:11,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:48:11,616 INFO L225 Difference]: With dead ends: 585 [2021-06-05 04:48:11,616 INFO L226 Difference]: Without dead ends: 424 [2021-06-05 04:48:11,616 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 1117.6ms TimeCoverageRelationStatistics Valid=201, Invalid=669, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:48:11,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-06-05 04:48:11,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 316. [2021-06-05 04:48:11,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 2.961904761904762) internal successors, (933), 315 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:11,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 933 transitions. [2021-06-05 04:48:11,619 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 933 transitions. Word has length 22 [2021-06-05 04:48:11,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:48:11,619 INFO L482 AbstractCegarLoop]: Abstraction has 316 states and 933 transitions. [2021-06-05 04:48:11,619 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:11,619 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 933 transitions. [2021-06-05 04:48:11,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:48:11,620 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:48:11,620 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:48:11,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2240,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:11,820 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:48:11,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:48:11,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1676379422, now seen corresponding path program 205 times [2021-06-05 04:48:11,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:48:11,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993277636] [2021-06-05 04:48:11,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:48:11,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:12,037 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:12,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:48:12,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993277636] [2021-06-05 04:48:12,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993277636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:12,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565049457] [2021-06-05 04:48:12,038 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:12,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:12,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:48:12,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:48:12,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:12,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:12,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:48:12,359 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:12,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:48:12,363 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:12,556 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2021-06-05 04:48:12,557 INFO L628 ElimStorePlain]: treesize reduction 71, result has 69.8 percent of original size [2021-06-05 04:48:12,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:48:12,561 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:12,644 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:48:12,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:48:12,649 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:12,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:48:12,653 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:12,729 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:48:12,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:48:12,735 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:12,810 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:48:12,814 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: 6 dim-0 vars, and 6 xjuncts. [2021-06-05 04:48:12,814 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:247, output treesize:150 [2021-06-05 04:48:13,033 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:13,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565049457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:13,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:48:13,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-06-05 04:48:13,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054452362] [2021-06-05 04:48:13,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:48:13,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:48:13,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:48:13,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:48:13,034 INFO L87 Difference]: Start difference. First operand 316 states and 933 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:14,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:48:14,058 INFO L93 Difference]: Finished difference Result 497 states and 1429 transitions. [2021-06-05 04:48:14,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:48:14,059 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:48:14,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:48:14,059 INFO L225 Difference]: With dead ends: 497 [2021-06-05 04:48:14,059 INFO L226 Difference]: Without dead ends: 386 [2021-06-05 04:48:14,060 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 1080.3ms TimeCoverageRelationStatistics Valid=162, Invalid=594, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:48:14,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2021-06-05 04:48:14,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 304. [2021-06-05 04:48:14,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.943894389438944) internal successors, (892), 303 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:14,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 892 transitions. [2021-06-05 04:48:14,063 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 892 transitions. Word has length 22 [2021-06-05 04:48:14,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:48:14,063 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 892 transitions. [2021-06-05 04:48:14,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:14,063 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 892 transitions. [2021-06-05 04:48:14,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:48:14,063 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:48:14,063 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:48:14,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2324 [2021-06-05 04:48:14,264 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:48:14,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:48:14,264 INFO L82 PathProgramCache]: Analyzing trace with hash -410758918, now seen corresponding path program 206 times [2021-06-05 04:48:14,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:48:14,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389191646] [2021-06-05 04:48:14,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:48:14,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:14,356 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:48:14,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:48:14,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389191646] [2021-06-05 04:48:14,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389191646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:14,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315962366] [2021-06-05 04:48:14,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:14,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:48:14,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:48:14,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:48:14,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:48:14,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:48:14,509 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:14,581 INFO L628 ElimStorePlain]: treesize reduction 26, result has 77.2 percent of original size [2021-06-05 04:48:14,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:48:14,584 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:14,637 INFO L628 ElimStorePlain]: treesize reduction 19, result has 77.4 percent of original size [2021-06-05 04:48:14,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:48:14,640 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:14,665 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:48:14,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:48:14,668 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:14,692 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:48:14,693 INFO L518 ElimStorePlain]: Eliminatee v_prenex_52 vanished before elimination [2021-06-05 04:48:14,695 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 5 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 04:48:14,695 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:117, output treesize:50 [2021-06-05 04:48:15,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:15,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:15,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:48:15,273 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:15,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:15,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:15,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:48:15,279 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:15,282 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:15,283 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:15,286 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:15,286 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:15,395 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-06-05 04:48:15,395 INFO L628 ElimStorePlain]: treesize reduction 133, result has 42.7 percent of original size [2021-06-05 04:48:15,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:48:15,399 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:15,443 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:48:15,446 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 04:48:15,446 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 4 variables, input treesize:306, output treesize:70 [2021-06-05 04:48:15,607 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:48:15,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315962366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:15,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:48:15,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:48:15,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456169910] [2021-06-05 04:48:15,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:48:15,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:48:15,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:48:15,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:48:15,608 INFO L87 Difference]: Start difference. First operand 304 states and 892 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:16,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:48:16,548 INFO L93 Difference]: Finished difference Result 860 states and 2502 transitions. [2021-06-05 04:48:16,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:48:16,548 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:48:16,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:48:16,549 INFO L225 Difference]: With dead ends: 860 [2021-06-05 04:48:16,549 INFO L226 Difference]: Without dead ends: 766 [2021-06-05 04:48:16,549 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 1029.8ms TimeCoverageRelationStatistics Valid=156, Invalid=714, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:48:16,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2021-06-05 04:48:16,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 333. [2021-06-05 04:48:16,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 3.0542168674698793) internal successors, (1014), 332 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:16,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 1014 transitions. [2021-06-05 04:48:16,554 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 1014 transitions. Word has length 23 [2021-06-05 04:48:16,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:48:16,554 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 1014 transitions. [2021-06-05 04:48:16,554 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:16,554 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 1014 transitions. [2021-06-05 04:48:16,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:48:16,554 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:48:16,554 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:48:16,755 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2352,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:16,755 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:48:16,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:48:16,755 INFO L82 PathProgramCache]: Analyzing trace with hash -2116971352, now seen corresponding path program 207 times [2021-06-05 04:48:16,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:48:16,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853151903] [2021-06-05 04:48:16,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:48:16,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:16,934 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:48:16,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:48:16,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853151903] [2021-06-05 04:48:16,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853151903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:16,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264310204] [2021-06-05 04:48:16,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:17,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:48:17,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:48:17,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:48:17,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:48:17,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:48:17,140 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:17,222 INFO L628 ElimStorePlain]: treesize reduction 31, result has 73.9 percent of original size [2021-06-05 04:48:17,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:48:17,226 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:17,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:48:17,229 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:17,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:48:17,233 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:17,287 INFO L628 ElimStorePlain]: treesize reduction 19, result has 75.3 percent of original size [2021-06-05 04:48:17,290 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 04:48:17,290 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:122, output treesize:50 [2021-06-05 04:48:17,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:17,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:17,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:48:17,639 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:17,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:17,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:17,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:48:17,646 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:17,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:17,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:17,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:48:17,650 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:17,652 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:17,653 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:17,690 INFO L628 ElimStorePlain]: treesize reduction 29, result has 59.7 percent of original size [2021-06-05 04:48:17,691 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:48:17,691 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:155, output treesize:35 [2021-06-05 04:48:17,767 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:48:17,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264310204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:17,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:48:17,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-06-05 04:48:17,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612843709] [2021-06-05 04:48:17,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:48:17,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:48:17,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:48:17,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:48:17,768 INFO L87 Difference]: Start difference. First operand 333 states and 1014 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:20,523 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 72 [2021-06-05 04:48:21,265 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 73 [2021-06-05 04:48:21,671 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 68 [2021-06-05 04:48:21,807 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 66 [2021-06-05 04:48:22,208 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2021-06-05 04:48:22,337 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 69 [2021-06-05 04:48:22,475 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 70 [2021-06-05 04:48:22,640 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 71 [2021-06-05 04:48:22,796 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 71 [2021-06-05 04:48:22,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:48:22,907 INFO L93 Difference]: Finished difference Result 1183 states and 3328 transitions. [2021-06-05 04:48:22,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 04:48:22,908 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:48:22,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:48:22,909 INFO L225 Difference]: With dead ends: 1183 [2021-06-05 04:48:22,909 INFO L226 Difference]: Without dead ends: 983 [2021-06-05 04:48:22,909 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 4701.9ms TimeCoverageRelationStatistics Valid=596, Invalid=3564, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 04:48:22,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2021-06-05 04:48:22,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 404. [2021-06-05 04:48:22,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 3.129032258064516) internal successors, (1261), 403 states have internal predecessors, (1261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:22,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 1261 transitions. [2021-06-05 04:48:22,915 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 1261 transitions. Word has length 23 [2021-06-05 04:48:22,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:48:22,915 INFO L482 AbstractCegarLoop]: Abstraction has 404 states and 1261 transitions. [2021-06-05 04:48:22,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:22,915 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 1261 transitions. [2021-06-05 04:48:22,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:48:22,915 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:48:22,915 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:48:23,115 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2509,209 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:23,116 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:48:23,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:48:23,116 INFO L82 PathProgramCache]: Analyzing trace with hash -305065448, now seen corresponding path program 208 times [2021-06-05 04:48:23,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:48:23,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192908628] [2021-06-05 04:48:23,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:48:23,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:23,288 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:48:23,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:48:23,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192908628] [2021-06-05 04:48:23,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192908628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:23,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36137393] [2021-06-05 04:48:23,288 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:23,379 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:48:23,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:48:23,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:48:23,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:48:23,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:48:23,427 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:23,499 INFO L628 ElimStorePlain]: treesize reduction 31, result has 73.9 percent of original size [2021-06-05 04:48:23,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:48:23,502 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:23,536 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:48:23,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:48:23,539 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:23,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:48:23,542 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:23,589 INFO L628 ElimStorePlain]: treesize reduction 19, result has 75.3 percent of original size [2021-06-05 04:48:23,592 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 04:48:23,592 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:122, output treesize:50 [2021-06-05 04:48:24,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:24,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:24,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:48:24,036 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:24,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:24,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:24,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:48:24,039 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:24,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:24,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:24,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:48:24,043 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:24,046 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:24,047 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:24,083 INFO L628 ElimStorePlain]: treesize reduction 29, result has 59.7 percent of original size [2021-06-05 04:48:24,084 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:48:24,084 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:155, output treesize:35 [2021-06-05 04:48:24,154 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:48:24,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36137393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:24,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:48:24,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-06-05 04:48:24,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928623355] [2021-06-05 04:48:24,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:48:24,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:48:24,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:48:24,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:48:24,155 INFO L87 Difference]: Start difference. First operand 404 states and 1261 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:27,018 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2021-06-05 04:48:27,165 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2021-06-05 04:48:27,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:48:27,201 INFO L93 Difference]: Finished difference Result 977 states and 2802 transitions. [2021-06-05 04:48:27,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 04:48:27,201 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:48:27,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:48:27,202 INFO L225 Difference]: With dead ends: 977 [2021-06-05 04:48:27,202 INFO L226 Difference]: Without dead ends: 823 [2021-06-05 04:48:27,203 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 2737.0ms TimeCoverageRelationStatistics Valid=359, Invalid=2091, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 04:48:27,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2021-06-05 04:48:27,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 427. [2021-06-05 04:48:27,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 426 states have (on average 3.1103286384976525) internal successors, (1325), 426 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:27,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 1325 transitions. [2021-06-05 04:48:27,208 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 1325 transitions. Word has length 23 [2021-06-05 04:48:27,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:48:27,208 INFO L482 AbstractCegarLoop]: Abstraction has 427 states and 1325 transitions. [2021-06-05 04:48:27,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:27,208 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 1325 transitions. [2021-06-05 04:48:27,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:48:27,209 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:48:27,209 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:48:27,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2563 [2021-06-05 04:48:27,409 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:48:27,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:48:27,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1627372824, now seen corresponding path program 209 times [2021-06-05 04:48:27,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:48:27,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161199636] [2021-06-05 04:48:27,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:48:27,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:27,495 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:48:27,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:48:27,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161199636] [2021-06-05 04:48:27,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161199636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:27,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652389655] [2021-06-05 04:48:27,495 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:27,587 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:48:27,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:48:27,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:48:27,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:48:27,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:48:27,657 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:27,727 INFO L628 ElimStorePlain]: treesize reduction 4, result has 95.7 percent of original size [2021-06-05 04:48:27,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:48:27,731 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:27,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:48:27,734 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:27,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:48:27,737 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:27,783 INFO L628 ElimStorePlain]: treesize reduction 19, result has 75.3 percent of original size [2021-06-05 04:48:27,786 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 04:48:27,786 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:95, output treesize:50 [2021-06-05 04:48:28,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:28,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:28,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:48:28,021 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:28,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:28,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:28,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:48:28,025 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:28,026 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:28,027 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:28,037 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:48:28,038 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:48:28,038 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:82, output treesize:20 [2021-06-05 04:48:28,093 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:48:28,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652389655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:28,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:48:28,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:48:28,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855288698] [2021-06-05 04:48:28,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:48:28,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:48:28,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:48:28,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:48:28,094 INFO L87 Difference]: Start difference. First operand 427 states and 1325 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:30,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:48:30,349 INFO L93 Difference]: Finished difference Result 970 states and 2782 transitions. [2021-06-05 04:48:30,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 04:48:30,349 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:48:30,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:48:30,350 INFO L225 Difference]: With dead ends: 970 [2021-06-05 04:48:30,350 INFO L226 Difference]: Without dead ends: 830 [2021-06-05 04:48:30,350 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 1974.4ms TimeCoverageRelationStatistics Valid=336, Invalid=1470, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 04:48:30,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-06-05 04:48:30,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 517. [2021-06-05 04:48:30,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 516 states have (on average 3.011627906976744) internal successors, (1554), 516 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:30,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 1554 transitions. [2021-06-05 04:48:30,356 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 1554 transitions. Word has length 23 [2021-06-05 04:48:30,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:48:30,356 INFO L482 AbstractCegarLoop]: Abstraction has 517 states and 1554 transitions. [2021-06-05 04:48:30,356 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:30,356 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 1554 transitions. [2021-06-05 04:48:30,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:48:30,357 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:48:30,357 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:48:30,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2641,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:30,557 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:48:30,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:48:30,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1406216122, now seen corresponding path program 210 times [2021-06-05 04:48:30,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:48:30,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228383014] [2021-06-05 04:48:30,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:48:30,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:30,645 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:48:30,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:48:30,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228383014] [2021-06-05 04:48:30,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228383014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:30,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360787496] [2021-06-05 04:48:30,645 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:30,737 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:48:30,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:48:30,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:48:30,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:48:30,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:48:30,809 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:30,912 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 35 [2021-06-05 04:48:30,912 INFO L628 ElimStorePlain]: treesize reduction 4, result has 96.9 percent of original size [2021-06-05 04:48:30,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:48:30,932 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:30,994 INFO L628 ElimStorePlain]: treesize reduction 50, result has 58.7 percent of original size [2021-06-05 04:48:30,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:48:30,998 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:31,052 INFO L628 ElimStorePlain]: treesize reduction 3, result has 95.6 percent of original size [2021-06-05 04:48:31,052 INFO L518 ElimStorePlain]: Eliminatee v_prenex_63 vanished before elimination [2021-06-05 04:48:31,054 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 04:48:31,054 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:132, output treesize:57 [2021-06-05 04:48:31,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:31,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:31,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:48:31,511 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:31,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:31,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:31,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:48:31,516 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:31,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:31,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:31,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:48:31,521 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:31,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:31,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:48:31,525 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:31,668 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2021-06-05 04:48:31,668 INFO L628 ElimStorePlain]: treesize reduction 99, result has 55.2 percent of original size [2021-06-05 04:48:31,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:48:31,672 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:31,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:48:31,676 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:31,729 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:48:31,731 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 04:48:31,731 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:301, output treesize:78 [2021-06-05 04:48:31,890 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:48:31,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360787496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:31,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:48:31,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:48:31,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283957863] [2021-06-05 04:48:31,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:48:31,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:48:31,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:48:31,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:48:31,891 INFO L87 Difference]: Start difference. First operand 517 states and 1554 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:33,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:48:33,960 INFO L93 Difference]: Finished difference Result 1104 states and 3228 transitions. [2021-06-05 04:48:33,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 04:48:33,961 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:48:33,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:48:33,962 INFO L225 Difference]: With dead ends: 1104 [2021-06-05 04:48:33,962 INFO L226 Difference]: Without dead ends: 897 [2021-06-05 04:48:33,962 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 1579.4ms TimeCoverageRelationStatistics Valid=205, Invalid=1775, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 04:48:33,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2021-06-05 04:48:33,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 558. [2021-06-05 04:48:33,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 557 states have (on average 3.0215439856373427) internal successors, (1683), 557 states have internal predecessors, (1683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:33,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 1683 transitions. [2021-06-05 04:48:33,968 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 1683 transitions. Word has length 23 [2021-06-05 04:48:33,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:48:33,968 INFO L482 AbstractCegarLoop]: Abstraction has 558 states and 1683 transitions. [2021-06-05 04:48:33,968 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:33,968 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 1683 transitions. [2021-06-05 04:48:33,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:48:33,969 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:48:33,969 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:48:34,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2678 [2021-06-05 04:48:34,169 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:48:34,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:48:34,170 INFO L82 PathProgramCache]: Analyzing trace with hash 637122102, now seen corresponding path program 211 times [2021-06-05 04:48:34,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:48:34,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001457084] [2021-06-05 04:48:34,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:48:34,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:34,259 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:48:34,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:48:34,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001457084] [2021-06-05 04:48:34,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001457084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:34,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108985479] [2021-06-05 04:48:34,259 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:34,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:34,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:48:34,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:48:34,596 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_68, v_prenex_69, ends_with_2, v_prenex_70], 1=[ends_with_6]} [2021-06-05 04:48:34,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:48:34,601 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:34,604 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:34,604 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:34,686 INFO L628 ElimStorePlain]: treesize reduction 124, result has 39.5 percent of original size [2021-06-05 04:48:34,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:48:34,689 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:34,721 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:48:34,722 INFO L518 ElimStorePlain]: Eliminatee ends_with_2 vanished before elimination [2021-06-05 04:48:34,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:48:34,726 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:34,785 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.6 percent of original size [2021-06-05 04:48:34,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:48:34,788 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:34,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:48:34,792 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:34,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:48:34,795 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:34,842 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.4 percent of original size [2021-06-05 04:48:34,843 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 5 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:48:34,843 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 6 variables, input treesize:241, output treesize:35 [2021-06-05 04:48:34,928 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:48:34,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108985479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:34,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:48:34,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 04:48:34,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617559888] [2021-06-05 04:48:34,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:48:34,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:48:34,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:48:34,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:48:34,929 INFO L87 Difference]: Start difference. First operand 558 states and 1683 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:35,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:48:35,185 INFO L93 Difference]: Finished difference Result 750 states and 2242 transitions. [2021-06-05 04:48:35,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:48:35,185 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:48:35,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:48:35,186 INFO L225 Difference]: With dead ends: 750 [2021-06-05 04:48:35,186 INFO L226 Difference]: Without dead ends: 696 [2021-06-05 04:48:35,186 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 279.6ms TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:48:35,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2021-06-05 04:48:35,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 558. [2021-06-05 04:48:35,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 557 states have (on average 3.0215439856373427) internal successors, (1683), 557 states have internal predecessors, (1683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:35,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 1683 transitions. [2021-06-05 04:48:35,192 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 1683 transitions. Word has length 23 [2021-06-05 04:48:35,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:48:35,192 INFO L482 AbstractCegarLoop]: Abstraction has 558 states and 1683 transitions. [2021-06-05 04:48:35,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:35,192 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 1683 transitions. [2021-06-05 04:48:35,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:48:35,193 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:48:35,193 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:48:35,393 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2837,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:35,393 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:48:35,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:48:35,394 INFO L82 PathProgramCache]: Analyzing trace with hash -1079785372, now seen corresponding path program 212 times [2021-06-05 04:48:35,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:48:35,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381045385] [2021-06-05 04:48:35,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:48:35,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:35,490 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:48:35,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:48:35,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381045385] [2021-06-05 04:48:35,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381045385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:35,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182897778] [2021-06-05 04:48:35,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:35,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:48:35,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:48:35,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:48:35,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:48:35,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:48:35,667 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:35,749 INFO L628 ElimStorePlain]: treesize reduction 4, result has 96.2 percent of original size [2021-06-05 04:48:35,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:48:35,752 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:35,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:48:35,755 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:35,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:48:35,759 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:35,815 INFO L628 ElimStorePlain]: treesize reduction 22, result has 75.3 percent of original size [2021-06-05 04:48:35,817 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 04:48:35,818 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:107, output treesize:59 [2021-06-05 04:48:36,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:36,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:36,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:48:36,029 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:36,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:36,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:36,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:48:36,034 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:36,037 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:36,037 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:36,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:36,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:48:36,042 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:36,160 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-06-05 04:48:36,160 INFO L628 ElimStorePlain]: treesize reduction 136, result has 42.1 percent of original size [2021-06-05 04:48:36,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:48:36,164 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:36,207 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:48:36,209 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 04:48:36,209 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 4 variables, input treesize:309, output treesize:70 [2021-06-05 04:48:36,357 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:48:36,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182897778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:36,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:48:36,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 04:48:36,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367929991] [2021-06-05 04:48:36,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:48:36,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:48:36,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:48:36,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:48:36,358 INFO L87 Difference]: Start difference. First operand 558 states and 1683 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:37,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:48:37,133 INFO L93 Difference]: Finished difference Result 1129 states and 3259 transitions. [2021-06-05 04:48:37,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:48:37,133 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:48:37,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:48:37,134 INFO L225 Difference]: With dead ends: 1129 [2021-06-05 04:48:37,134 INFO L226 Difference]: Without dead ends: 967 [2021-06-05 04:48:37,134 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 840.2ms TimeCoverageRelationStatistics Valid=142, Invalid=670, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:48:37,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2021-06-05 04:48:37,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 588. [2021-06-05 04:48:37,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 587 states have (on average 3.110732538330494) internal successors, (1826), 587 states have internal predecessors, (1826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:37,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 1826 transitions. [2021-06-05 04:48:37,141 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 1826 transitions. Word has length 23 [2021-06-05 04:48:37,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:48:37,141 INFO L482 AbstractCegarLoop]: Abstraction has 588 states and 1826 transitions. [2021-06-05 04:48:37,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:37,141 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 1826 transitions. [2021-06-05 04:48:37,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:48:37,142 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:48:37,142 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:48:37,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2876 [2021-06-05 04:48:37,342 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:48:37,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:48:37,343 INFO L82 PathProgramCache]: Analyzing trace with hash 353330104, now seen corresponding path program 213 times [2021-06-05 04:48:37,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:48:37,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013305316] [2021-06-05 04:48:37,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:48:37,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:37,453 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:48:37,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:48:37,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013305316] [2021-06-05 04:48:37,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013305316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:37,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556044291] [2021-06-05 04:48:37,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:37,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:48:37,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:48:37,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:48:37,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:48:37,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:48:37,611 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:37,697 INFO L628 ElimStorePlain]: treesize reduction 34, result has 74.6 percent of original size [2021-06-05 04:48:37,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:48:37,700 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:37,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:48:37,704 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:37,763 INFO L628 ElimStorePlain]: treesize reduction 22, result has 76.1 percent of original size [2021-06-05 04:48:37,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:48:37,767 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:37,795 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:48:37,797 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 04:48:37,797 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:137, output treesize:59 [2021-06-05 04:48:38,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:38,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:38,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:48:38,019 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:38,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:38,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:38,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:48:38,023 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:38,025 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:38,025 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:38,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:38,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:48:38,029 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:38,066 INFO L628 ElimStorePlain]: treesize reduction 29, result has 59.7 percent of original size [2021-06-05 04:48:38,067 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:48:38,067 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:155, output treesize:35 [2021-06-05 04:48:38,136 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:48:38,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556044291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:38,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:48:38,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2021-06-05 04:48:38,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134126336] [2021-06-05 04:48:38,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:48:38,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:48:38,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:48:38,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:48:38,137 INFO L87 Difference]: Start difference. First operand 588 states and 1826 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:39,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:48:39,833 INFO L93 Difference]: Finished difference Result 1145 states and 3412 transitions. [2021-06-05 04:48:39,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 04:48:39,834 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:48:39,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:48:39,835 INFO L225 Difference]: With dead ends: 1145 [2021-06-05 04:48:39,835 INFO L226 Difference]: Without dead ends: 965 [2021-06-05 04:48:39,835 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 1296.2ms TimeCoverageRelationStatistics Valid=199, Invalid=1361, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 04:48:39,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 965 states. [2021-06-05 04:48:39,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 965 to 639. [2021-06-05 04:48:39,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 638 states have (on average 3.115987460815047) internal successors, (1988), 638 states have internal predecessors, (1988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:39,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 1988 transitions. [2021-06-05 04:48:39,842 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 1988 transitions. Word has length 23 [2021-06-05 04:48:39,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:48:39,842 INFO L482 AbstractCegarLoop]: Abstraction has 639 states and 1988 transitions. [2021-06-05 04:48:39,842 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:39,842 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 1988 transitions. [2021-06-05 04:48:39,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:48:39,843 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:48:39,843 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:48:40,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2930,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:40,044 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:48:40,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:48:40,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1859126854, now seen corresponding path program 214 times [2021-06-05 04:48:40,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:48:40,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585658384] [2021-06-05 04:48:40,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:48:40,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:40,180 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:48:40,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:48:40,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585658384] [2021-06-05 04:48:40,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585658384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:40,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20421599] [2021-06-05 04:48:40,181 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:40,273 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:48:40,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:48:40,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:48:40,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:48:40,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:48:40,346 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:40,470 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 38 [2021-06-05 04:48:40,471 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.7 percent of original size [2021-06-05 04:48:40,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:48:40,475 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:40,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:48:40,478 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:40,557 INFO L628 ElimStorePlain]: treesize reduction 52, result has 64.9 percent of original size [2021-06-05 04:48:40,557 INFO L518 ElimStorePlain]: Eliminatee v_prenex_78 vanished before elimination [2021-06-05 04:48:40,557 INFO L518 ElimStorePlain]: Eliminatee ends_with_2 vanished before elimination [2021-06-05 04:48:40,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:48:40,561 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:40,616 INFO L628 ElimStorePlain]: treesize reduction 22, result has 76.1 percent of original size [2021-06-05 04:48:40,619 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 5 dim-1 vars, End of recursive call: 3 dim-0 vars, and 3 xjuncts. [2021-06-05 04:48:40,619 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:160, output treesize:70 [2021-06-05 04:48:41,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:41,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:41,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:48:41,265 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:41,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:41,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:41,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:48:41,271 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:41,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:41,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:41,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:48:41,278 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:41,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:41,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:48:41,283 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:41,414 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2021-06-05 04:48:41,415 INFO L628 ElimStorePlain]: treesize reduction 199, result has 37.8 percent of original size [2021-06-05 04:48:41,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:48:41,419 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:41,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:48:41,423 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:41,473 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:48:41,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:48:41,477 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:41,526 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:48:41,528 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 04:48:41,529 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 6 variables, input treesize:394, output treesize:68 [2021-06-05 04:48:41,677 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:48:41,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20421599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:41,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:48:41,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 04:48:41,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826402725] [2021-06-05 04:48:41,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:48:41,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:48:41,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:48:41,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:48:41,678 INFO L87 Difference]: Start difference. First operand 639 states and 1988 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:44,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:48:44,805 INFO L93 Difference]: Finished difference Result 1668 states and 4813 transitions. [2021-06-05 04:48:44,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 04:48:44,805 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:48:44,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:48:44,807 INFO L225 Difference]: With dead ends: 1668 [2021-06-05 04:48:44,807 INFO L226 Difference]: Without dead ends: 1480 [2021-06-05 04:48:44,807 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 2782.9ms TimeCoverageRelationStatistics Valid=354, Invalid=2402, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 04:48:44,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1480 states. [2021-06-05 04:48:44,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1480 to 678. [2021-06-05 04:48:44,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 678 states, 677 states have (on average 3.193500738552437) internal successors, (2162), 677 states have internal predecessors, (2162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:44,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 678 states to 678 states and 2162 transitions. [2021-06-05 04:48:44,817 INFO L78 Accepts]: Start accepts. Automaton has 678 states and 2162 transitions. Word has length 23 [2021-06-05 04:48:44,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:48:44,817 INFO L482 AbstractCegarLoop]: Abstraction has 678 states and 2162 transitions. [2021-06-05 04:48:44,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:44,817 INFO L276 IsEmpty]: Start isEmpty. Operand 678 states and 2162 transitions. [2021-06-05 04:48:44,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:48:44,818 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:48:44,818 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:48:45,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2964 [2021-06-05 04:48:45,018 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:48:45,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:48:45,018 INFO L82 PathProgramCache]: Analyzing trace with hash 630316840, now seen corresponding path program 215 times [2021-06-05 04:48:45,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:48:45,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919987165] [2021-06-05 04:48:45,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:48:45,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:45,152 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:45,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:48:45,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919987165] [2021-06-05 04:48:45,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919987165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:45,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757274123] [2021-06-05 04:48:45,153 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:45,246 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:48:45,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:48:45,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:48:45,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:48:45,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:48:45,309 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:45,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:48:45,312 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:45,314 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:45,315 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:45,374 INFO L628 ElimStorePlain]: treesize reduction 29, result has 70.7 percent of original size [2021-06-05 04:48:45,374 INFO L518 ElimStorePlain]: Eliminatee v_prenex_86 vanished before elimination [2021-06-05 04:48:45,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:48:45,378 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:45,405 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:48:45,408 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 04:48:45,408 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:137, output treesize:59 [2021-06-05 04:48:45,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:45,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:45,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:48:45,607 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:45,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:45,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:45,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:48:45,611 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:45,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:45,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:48:45,615 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:45,676 INFO L628 ElimStorePlain]: treesize reduction 86, result has 40.7 percent of original size [2021-06-05 04:48:45,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:48:45,680 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:45,701 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:48:45,703 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:48:45,703 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:37 [2021-06-05 04:48:45,809 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:48:45,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757274123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:45,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:48:45,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 04:48:45,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592578500] [2021-06-05 04:48:45,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:48:45,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:48:45,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:48:45,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:48:45,810 INFO L87 Difference]: Start difference. First operand 678 states and 2162 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:47,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:48:47,636 INFO L93 Difference]: Finished difference Result 1398 states and 4082 transitions. [2021-06-05 04:48:47,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 04:48:47,636 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:48:47,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:48:47,638 INFO L225 Difference]: With dead ends: 1398 [2021-06-05 04:48:47,638 INFO L226 Difference]: Without dead ends: 1240 [2021-06-05 04:48:47,638 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 1533.6ms TimeCoverageRelationStatistics Valid=248, Invalid=1474, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 04:48:47,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1240 states. [2021-06-05 04:48:47,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1240 to 675. [2021-06-05 04:48:47,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 674 states have (on average 3.1839762611275964) internal successors, (2146), 674 states have internal predecessors, (2146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:47,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 2146 transitions. [2021-06-05 04:48:47,647 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 2146 transitions. Word has length 23 [2021-06-05 04:48:47,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:48:47,647 INFO L482 AbstractCegarLoop]: Abstraction has 675 states and 2146 transitions. [2021-06-05 04:48:47,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:47,647 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 2146 transitions. [2021-06-05 04:48:47,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:48:47,648 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:48:47,648 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:48:47,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3182 [2021-06-05 04:48:47,848 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:48:47,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:48:47,849 INFO L82 PathProgramCache]: Analyzing trace with hash 620245514, now seen corresponding path program 216 times [2021-06-05 04:48:47,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:48:47,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641443144] [2021-06-05 04:48:47,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:48:47,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:47,981 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:48:47,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:48:47,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641443144] [2021-06-05 04:48:47,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641443144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:47,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229336763] [2021-06-05 04:48:47,982 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:48,077 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:48:48,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:48:48,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:48:48,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:48:48,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:48:48,139 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:48,242 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 35 [2021-06-05 04:48:48,242 INFO L628 ElimStorePlain]: treesize reduction 4, result has 96.9 percent of original size [2021-06-05 04:48:48,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:48:48,246 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:48,308 INFO L628 ElimStorePlain]: treesize reduction 50, result has 58.3 percent of original size [2021-06-05 04:48:48,308 INFO L518 ElimStorePlain]: Eliminatee v_prenex_90 vanished before elimination [2021-06-05 04:48:48,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:48:48,311 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:48,338 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:48:48,341 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 04:48:48,341 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:132, output treesize:59 [2021-06-05 04:48:48,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:48,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:48,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:48:48,557 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:48,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:48,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:48,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:48:48,561 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:48,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:48,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:48:48,564 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:48,588 INFO L628 ElimStorePlain]: treesize reduction 20, result has 58.3 percent of original size [2021-06-05 04:48:48,589 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:48:48,589 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:82, output treesize:20 [2021-06-05 04:48:48,642 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:48:48,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229336763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:48,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:48:48,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 04:48:48,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496203665] [2021-06-05 04:48:48,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:48:48,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:48:48,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:48:48,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:48:48,643 INFO L87 Difference]: Start difference. First operand 675 states and 2146 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:49,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:48:49,276 INFO L93 Difference]: Finished difference Result 931 states and 2785 transitions. [2021-06-05 04:48:49,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:48:49,276 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:48:49,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:48:49,277 INFO L225 Difference]: With dead ends: 931 [2021-06-05 04:48:49,277 INFO L226 Difference]: Without dead ends: 811 [2021-06-05 04:48:49,277 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 573.1ms TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:48:49,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2021-06-05 04:48:49,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 677. [2021-06-05 04:48:49,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 677 states, 676 states have (on average 3.1819526627218937) internal successors, (2151), 676 states have internal predecessors, (2151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:49,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 2151 transitions. [2021-06-05 04:48:49,285 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 2151 transitions. Word has length 23 [2021-06-05 04:48:49,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:48:49,285 INFO L482 AbstractCegarLoop]: Abstraction has 677 states and 2151 transitions. [2021-06-05 04:48:49,285 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:49,285 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 2151 transitions. [2021-06-05 04:48:49,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:48:49,285 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:48:49,285 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:48:49,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3219,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:49,486 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:48:49,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:48:49,486 INFO L82 PathProgramCache]: Analyzing trace with hash -161287938, now seen corresponding path program 217 times [2021-06-05 04:48:49,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:48:49,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741248684] [2021-06-05 04:48:49,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:48:49,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:49,608 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:48:49,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:48:49,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741248684] [2021-06-05 04:48:49,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741248684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:49,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147198614] [2021-06-05 04:48:49,609 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:49,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:49,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 04:48:49,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:48:49,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:48:49,795 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:49,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:48:49,798 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:49,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:48:49,802 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:49,863 INFO L628 ElimStorePlain]: treesize reduction 55, result has 56.0 percent of original size [2021-06-05 04:48:49,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:48:49,866 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:49,894 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:48:49,894 INFO L518 ElimStorePlain]: Eliminatee v_prenex_94 vanished before elimination [2021-06-05 04:48:49,896 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 04:48:49,896 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:137, output treesize:59 [2021-06-05 04:48:50,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:50,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:50,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:48:50,140 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:50,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:50,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:50,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:48:50,144 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:50,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:50,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:50,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:48:50,148 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:50,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:50,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:48:50,152 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:50,193 INFO L628 ElimStorePlain]: treesize reduction 49, result has 46.7 percent of original size [2021-06-05 04:48:50,195 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:48:50,195 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:153, output treesize:35 [2021-06-05 04:48:50,258 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:50,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147198614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:50,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:48:50,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-06-05 04:48:50,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185001111] [2021-06-05 04:48:50,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:48:50,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:48:50,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:48:50,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:48:50,258 INFO L87 Difference]: Start difference. First operand 677 states and 2151 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:52,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:48:52,379 INFO L93 Difference]: Finished difference Result 1484 states and 4400 transitions. [2021-06-05 04:48:52,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 04:48:52,379 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:48:52,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:48:52,381 INFO L225 Difference]: With dead ends: 1484 [2021-06-05 04:48:52,381 INFO L226 Difference]: Without dead ends: 1238 [2021-06-05 04:48:52,381 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 1777.0ms TimeCoverageRelationStatistics Valid=252, Invalid=2004, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 04:48:52,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1238 states. [2021-06-05 04:48:52,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1238 to 688. [2021-06-05 04:48:52,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 688 states, 687 states have (on average 3.1935953420669576) internal successors, (2194), 687 states have internal predecessors, (2194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:52,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 2194 transitions. [2021-06-05 04:48:52,389 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 2194 transitions. Word has length 23 [2021-06-05 04:48:52,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:48:52,389 INFO L482 AbstractCegarLoop]: Abstraction has 688 states and 2194 transitions. [2021-06-05 04:48:52,389 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:52,389 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 2194 transitions. [2021-06-05 04:48:52,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:48:52,390 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:48:52,390 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:48:52,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3248 [2021-06-05 04:48:52,613 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:48:52,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:48:52,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1644882548, now seen corresponding path program 218 times [2021-06-05 04:48:52,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:48:52,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717510997] [2021-06-05 04:48:52,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:48:52,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:52,695 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:48:52,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:48:52,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717510997] [2021-06-05 04:48:52,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717510997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:52,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126565938] [2021-06-05 04:48:52,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:52,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:48:52,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:48:52,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:48:52,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:48:52,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:48:52,886 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:52,969 INFO L628 ElimStorePlain]: treesize reduction 29, result has 77.5 percent of original size [2021-06-05 04:48:52,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:48:52,973 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:53,011 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:48:53,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:48:53,015 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:53,052 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:48:53,052 INFO L518 ElimStorePlain]: Eliminatee v_prenex_98 vanished before elimination [2021-06-05 04:48:53,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:48:53,056 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:53,112 INFO L628 ElimStorePlain]: treesize reduction 22, result has 75.3 percent of original size [2021-06-05 04:48:53,114 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 5 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 04:48:53,114 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:132, output treesize:59 [2021-06-05 04:48:53,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:53,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:53,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:48:53,354 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:53,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:53,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:53,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:48:53,358 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:53,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:53,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:53,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:48:53,362 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:53,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:53,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:48:53,365 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:53,406 INFO L628 ElimStorePlain]: treesize reduction 50, result has 46.2 percent of original size [2021-06-05 04:48:53,407 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:48:53,407 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:155, output treesize:35 [2021-06-05 04:48:53,475 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:48:53,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126565938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:53,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:48:53,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 04:48:53,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815198065] [2021-06-05 04:48:53,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:48:53,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:48:53,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:48:53,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:48:53,476 INFO L87 Difference]: Start difference. First operand 688 states and 2194 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:54,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:48:54,855 INFO L93 Difference]: Finished difference Result 1183 states and 3509 transitions. [2021-06-05 04:48:54,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 04:48:54,855 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:48:54,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:48:54,856 INFO L225 Difference]: With dead ends: 1183 [2021-06-05 04:48:54,856 INFO L226 Difference]: Without dead ends: 1017 [2021-06-05 04:48:54,857 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 1062.7ms TimeCoverageRelationStatistics Valid=181, Invalid=1459, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 04:48:54,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1017 states. [2021-06-05 04:48:54,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1017 to 669. [2021-06-05 04:48:54,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 669 states, 668 states have (on average 3.179640718562874) internal successors, (2124), 668 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:54,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 2124 transitions. [2021-06-05 04:48:54,865 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 2124 transitions. Word has length 23 [2021-06-05 04:48:54,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:48:54,866 INFO L482 AbstractCegarLoop]: Abstraction has 669 states and 2124 transitions. [2021-06-05 04:48:54,866 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:54,866 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 2124 transitions. [2021-06-05 04:48:54,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:48:54,867 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:48:54,867 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:48:55,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3305,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:55,077 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:48:55,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:48:55,077 INFO L82 PathProgramCache]: Analyzing trace with hash 2094348922, now seen corresponding path program 219 times [2021-06-05 04:48:55,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:48:55,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179853183] [2021-06-05 04:48:55,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:48:55,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:55,233 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:55,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:48:55,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179853183] [2021-06-05 04:48:55,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179853183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:55,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510298838] [2021-06-05 04:48:55,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:55,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:48:55,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:48:55,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:48:55,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:48:55,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:48:55,417 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:55,482 INFO L628 ElimStorePlain]: treesize reduction 72, result has 54.7 percent of original size [2021-06-05 04:48:55,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:48:55,486 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:55,526 INFO L628 ElimStorePlain]: treesize reduction 31, result has 62.7 percent of original size [2021-06-05 04:48:55,528 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-05 04:48:55,528 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:162, output treesize:42 [2021-06-05 04:48:55,839 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_102, ends_with_2, v_prenex_104, v_prenex_103, v_prenex_105], 1=[ends_with_6]} [2021-06-05 04:48:55,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:48:55,844 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:55,847 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:55,848 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:55,976 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2021-06-05 04:48:55,977 INFO L628 ElimStorePlain]: treesize reduction 126, result has 51.4 percent of original size [2021-06-05 04:48:55,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:48:55,981 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:55,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:48:55,984 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:56,038 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:48:56,039 INFO L518 ElimStorePlain]: Eliminatee v_prenex_104 vanished before elimination [2021-06-05 04:48:56,039 INFO L518 ElimStorePlain]: Eliminatee v_prenex_103 vanished before elimination [2021-06-05 04:48:56,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:48:56,045 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:56,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:48:56,048 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:56,146 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.2 percent of original size [2021-06-05 04:48:56,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:48:56,150 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:56,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:48:56,153 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:56,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:48:56,156 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:56,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:48:56,159 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:56,227 INFO L628 ElimStorePlain]: treesize reduction 22, result has 78.6 percent of original size [2021-06-05 04:48:56,231 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:48:56,231 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 8 variables, input treesize:298, output treesize:35 [2021-06-05 04:48:56,310 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:48:56,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510298838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:56,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:48:56,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-06-05 04:48:56,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022780436] [2021-06-05 04:48:56,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:48:56,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:48:56,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:48:56,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:48:56,311 INFO L87 Difference]: Start difference. First operand 669 states and 2124 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:59,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:48:59,397 INFO L93 Difference]: Finished difference Result 1532 states and 4667 transitions. [2021-06-05 04:48:59,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 04:48:59,397 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:48:59,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:48:59,399 INFO L225 Difference]: With dead ends: 1532 [2021-06-05 04:48:59,399 INFO L226 Difference]: Without dead ends: 1355 [2021-06-05 04:48:59,399 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1069 ImplicationChecksByTransitivity, 2700.1ms TimeCoverageRelationStatistics Valid=534, Invalid=3126, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 04:48:59,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1355 states. [2021-06-05 04:48:59,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1355 to 758. [2021-06-05 04:48:59,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 757 states have (on average 3.248348745046235) internal successors, (2459), 757 states have internal predecessors, (2459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:59,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2459 transitions. [2021-06-05 04:48:59,408 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2459 transitions. Word has length 23 [2021-06-05 04:48:59,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:48:59,408 INFO L482 AbstractCegarLoop]: Abstraction has 758 states and 2459 transitions. [2021-06-05 04:48:59,408 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:48:59,408 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2459 transitions. [2021-06-05 04:48:59,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:48:59,409 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:48:59,409 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:48:59,610 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3363,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:59,610 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:48:59,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:48:59,610 INFO L82 PathProgramCache]: Analyzing trace with hash -2146347564, now seen corresponding path program 220 times [2021-06-05 04:48:59,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:48:59,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784321838] [2021-06-05 04:48:59,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:48:59,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:59,720 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:48:59,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:48:59,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784321838] [2021-06-05 04:48:59,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784321838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:59,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246920557] [2021-06-05 04:48:59,721 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:59,813 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:48:59,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:48:59,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:48:59,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:48:59,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:48:59,969 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:59,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:48:59,972 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:59,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:48:59,976 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:59,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:48:59,980 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:59,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:48:59,984 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:59,986 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:59,996 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:59,999 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:59,999 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:00,002 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:00,003 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:00,088 INFO L628 ElimStorePlain]: treesize reduction 27, result has 78.6 percent of original size [2021-06-05 04:49:00,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:00,091 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:00,131 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:00,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:00,134 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:00,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:00,137 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:00,204 INFO L628 ElimStorePlain]: treesize reduction 3, result has 96.6 percent of original size [2021-06-05 04:49:00,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:00,208 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:00,255 INFO L628 ElimStorePlain]: treesize reduction 21, result has 74.4 percent of original size [2021-06-05 04:49:00,256 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:49:00,256 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:231, output treesize:45 [2021-06-05 04:49:00,352 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:49:00,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246920557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:00,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:49:00,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-05 04:49:00,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236058516] [2021-06-05 04:49:00,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:49:00,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:49:00,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:49:00,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:49:00,353 INFO L87 Difference]: Start difference. First operand 758 states and 2459 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:00,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:49:00,781 INFO L93 Difference]: Finished difference Result 1012 states and 3166 transitions. [2021-06-05 04:49:00,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:49:00,781 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:49:00,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:49:00,782 INFO L225 Difference]: With dead ends: 1012 [2021-06-05 04:49:00,782 INFO L226 Difference]: Without dead ends: 967 [2021-06-05 04:49:00,783 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 444.8ms TimeCoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:49:00,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2021-06-05 04:49:00,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 716. [2021-06-05 04:49:00,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 3.1706293706293707) internal successors, (2267), 715 states have internal predecessors, (2267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:00,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 2267 transitions. [2021-06-05 04:49:00,790 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 2267 transitions. Word has length 23 [2021-06-05 04:49:00,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:49:00,790 INFO L482 AbstractCegarLoop]: Abstraction has 716 states and 2267 transitions. [2021-06-05 04:49:00,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:00,790 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 2267 transitions. [2021-06-05 04:49:00,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:49:00,791 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:49:00,791 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:49:00,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3414 [2021-06-05 04:49:00,993 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:49:00,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:49:00,993 INFO L82 PathProgramCache]: Analyzing trace with hash -554888474, now seen corresponding path program 221 times [2021-06-05 04:49:00,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:49:00,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620067684] [2021-06-05 04:49:00,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:49:00,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:01,135 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:49:01,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:49:01,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620067684] [2021-06-05 04:49:01,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620067684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:01,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55354969] [2021-06-05 04:49:01,135 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:01,229 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:49:01,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:49:01,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:49:01,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:49:01,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:01,329 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:01,424 INFO L628 ElimStorePlain]: treesize reduction 6, result has 94.2 percent of original size [2021-06-05 04:49:01,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:01,429 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:01,504 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.9 percent of original size [2021-06-05 04:49:01,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:01,508 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:01,543 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:01,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:01,546 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:01,600 INFO L628 ElimStorePlain]: treesize reduction 21, result has 75.6 percent of original size [2021-06-05 04:49:01,602 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 04:49:01,602 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:107, output treesize:60 [2021-06-05 04:49:02,043 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_112, ends_with_10], 3=[ends_with_2]} [2021-06-05 04:49:02,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:02,049 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:02,054 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:02,055 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:02,060 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:02,060 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:02,372 WARN L205 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2021-06-05 04:49:02,372 INFO L628 ElimStorePlain]: treesize reduction 220, result has 53.8 percent of original size [2021-06-05 04:49:02,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:02,378 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:02,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:02,383 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:02,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:02,388 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:02,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:02,394 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:02,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:02,399 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:02,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:02,404 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:02,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:02,409 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:02,604 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2021-06-05 04:49:02,604 INFO L628 ElimStorePlain]: treesize reduction 28, result has 87.9 percent of original size [2021-06-05 04:49:02,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:02,609 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:02,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:02,614 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:02,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:02,618 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:02,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:02,623 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:02,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:02,628 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:02,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:02,632 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:02,771 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2021-06-05 04:49:02,772 INFO L628 ElimStorePlain]: treesize reduction 26, result has 85.6 percent of original size [2021-06-05 04:49:02,774 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 04:49:02,775 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 6 variables, input treesize:554, output treesize:93 [2021-06-05 04:49:02,932 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:49:02,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55354969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:02,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:49:02,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-05 04:49:02,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787119312] [2021-06-05 04:49:02,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:49:02,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:49:02,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:49:02,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:49:02,933 INFO L87 Difference]: Start difference. First operand 716 states and 2267 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:04,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:49:04,002 INFO L93 Difference]: Finished difference Result 1121 states and 3478 transitions. [2021-06-05 04:49:04,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:49:04,002 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:49:04,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:49:04,003 INFO L225 Difference]: With dead ends: 1121 [2021-06-05 04:49:04,003 INFO L226 Difference]: Without dead ends: 1031 [2021-06-05 04:49:04,003 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 1066.5ms TimeCoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:49:04,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1031 states. [2021-06-05 04:49:04,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1031 to 726. [2021-06-05 04:49:04,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 726 states, 725 states have (on average 3.169655172413793) internal successors, (2298), 725 states have internal predecessors, (2298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:04,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 2298 transitions. [2021-06-05 04:49:04,011 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 2298 transitions. Word has length 23 [2021-06-05 04:49:04,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:49:04,011 INFO L482 AbstractCegarLoop]: Abstraction has 726 states and 2298 transitions. [2021-06-05 04:49:04,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:04,011 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 2298 transitions. [2021-06-05 04:49:04,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:49:04,012 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:49:04,012 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:49:04,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3448,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:04,212 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:49:04,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:49:04,213 INFO L82 PathProgramCache]: Analyzing trace with hash 620602170, now seen corresponding path program 222 times [2021-06-05 04:49:04,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:49:04,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272209747] [2021-06-05 04:49:04,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:49:04,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:04,338 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:49:04,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:49:04,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272209747] [2021-06-05 04:49:04,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272209747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:04,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494774596] [2021-06-05 04:49:04,339 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:04,440 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:49:04,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:49:04,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:49:04,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:49:04,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:04,507 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:04,577 INFO L628 ElimStorePlain]: treesize reduction 28, result has 76.3 percent of original size [2021-06-05 04:49:04,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:04,590 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:04,639 INFO L628 ElimStorePlain]: treesize reduction 22, result has 74.4 percent of original size [2021-06-05 04:49:04,640 INFO L518 ElimStorePlain]: Eliminatee v_prenex_114 vanished before elimination [2021-06-05 04:49:04,640 INFO L518 ElimStorePlain]: Eliminatee ends_with_10 vanished before elimination [2021-06-05 04:49:04,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:04,643 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:04,666 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:04,667 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:49:04,667 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:122, output treesize:61 [2021-06-05 04:49:04,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:04,795 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:04,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:04,799 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:04,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:04,803 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:04,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:04,816 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:04,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:04,820 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:04,823 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:04,823 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:04,826 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:04,827 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:04,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:04,831 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:04,900 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:04,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:04,904 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:04,971 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:04,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:04,978 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:04,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:04,982 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:04,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:04,986 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:04,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:04,989 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:05,105 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-06-05 04:49:05,105 INFO L628 ElimStorePlain]: treesize reduction 4, result has 97.5 percent of original size [2021-06-05 04:49:05,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:05,113 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:05,205 INFO L628 ElimStorePlain]: treesize reduction 28, result has 81.5 percent of original size [2021-06-05 04:49:05,207 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 04:49:05,207 INFO L247 ElimStorePlain]: Needed 15 recursive calls to eliminate 5 variables, input treesize:269, output treesize:98 [2021-06-05 04:49:05,365 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:49:05,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494774596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:05,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:49:05,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-05 04:49:05,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286173430] [2021-06-05 04:49:05,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:49:05,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:49:05,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:49:05,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:49:05,366 INFO L87 Difference]: Start difference. First operand 726 states and 2298 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:06,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:49:06,157 INFO L93 Difference]: Finished difference Result 1248 states and 3824 transitions. [2021-06-05 04:49:06,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:49:06,157 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:49:06,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:49:06,159 INFO L225 Difference]: With dead ends: 1248 [2021-06-05 04:49:06,159 INFO L226 Difference]: Without dead ends: 1158 [2021-06-05 04:49:06,159 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 833.5ms TimeCoverageRelationStatistics Valid=151, Invalid=779, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:49:06,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1158 states. [2021-06-05 04:49:06,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1158 to 736. [2021-06-05 04:49:06,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 735 states have (on average 3.182312925170068) internal successors, (2339), 735 states have internal predecessors, (2339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:06,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 2339 transitions. [2021-06-05 04:49:06,167 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 2339 transitions. Word has length 23 [2021-06-05 04:49:06,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:49:06,167 INFO L482 AbstractCegarLoop]: Abstraction has 736 states and 2339 transitions. [2021-06-05 04:49:06,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:06,167 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 2339 transitions. [2021-06-05 04:49:06,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:49:06,168 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:49:06,168 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:49:06,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3545 [2021-06-05 04:49:06,369 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:49:06,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:49:06,369 INFO L82 PathProgramCache]: Analyzing trace with hash -2060798392, now seen corresponding path program 223 times [2021-06-05 04:49:06,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:49:06,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799424822] [2021-06-05 04:49:06,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:49:06,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:06,571 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:49:06,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:49:06,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799424822] [2021-06-05 04:49:06,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799424822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:06,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168172220] [2021-06-05 04:49:06,572 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:06,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:06,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:49:06,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:49:07,068 INFO L446 ElimStorePlain]: Different costs {0=[ends_with_6, v_prenex_119], 1=[ends_with_2]} [2021-06-05 04:49:07,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:07,071 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:07,074 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:07,074 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:07,140 INFO L628 ElimStorePlain]: treesize reduction 180, result has 28.3 percent of original size [2021-06-05 04:49:07,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:07,143 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:07,178 INFO L628 ElimStorePlain]: treesize reduction 24, result has 64.2 percent of original size [2021-06-05 04:49:07,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:07,181 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:07,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:07,184 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:07,198 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:07,198 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:49:07,199 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 4 variables, input treesize:278, output treesize:20 [2021-06-05 04:49:07,257 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:49:07,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168172220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:07,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:49:07,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-06-05 04:49:07,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132928875] [2021-06-05 04:49:07,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:49:07,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:49:07,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:49:07,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=375, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:49:07,258 INFO L87 Difference]: Start difference. First operand 736 states and 2339 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:09,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:49:09,289 INFO L93 Difference]: Finished difference Result 1116 states and 3361 transitions. [2021-06-05 04:49:09,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 04:49:09,289 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:49:09,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:49:09,291 INFO L225 Difference]: With dead ends: 1116 [2021-06-05 04:49:09,291 INFO L226 Difference]: Without dead ends: 1050 [2021-06-05 04:49:09,291 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 1665.9ms TimeCoverageRelationStatistics Valid=254, Invalid=2196, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 04:49:09,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1050 states. [2021-06-05 04:49:09,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1050 to 710. [2021-06-05 04:49:09,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 710 states, 709 states have (on average 3.170662905500705) internal successors, (2248), 709 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:09,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710 states to 710 states and 2248 transitions. [2021-06-05 04:49:09,299 INFO L78 Accepts]: Start accepts. Automaton has 710 states and 2248 transitions. Word has length 23 [2021-06-05 04:49:09,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:49:09,299 INFO L482 AbstractCegarLoop]: Abstraction has 710 states and 2248 transitions. [2021-06-05 04:49:09,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:09,299 INFO L276 IsEmpty]: Start isEmpty. Operand 710 states and 2248 transitions. [2021-06-05 04:49:09,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:49:09,299 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:49:09,299 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:49:09,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 225 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3582 [2021-06-05 04:49:09,501 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:49:09,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:49:09,501 INFO L82 PathProgramCache]: Analyzing trace with hash -973949894, now seen corresponding path program 224 times [2021-06-05 04:49:09,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:49:09,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157324539] [2021-06-05 04:49:09,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:49:09,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:09,659 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:49:09,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:49:09,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157324539] [2021-06-05 04:49:09,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157324539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:09,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317569747] [2021-06-05 04:49:09,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:09,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:49:09,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:49:09,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:49:09,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:49:09,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:09,831 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:09,892 INFO L628 ElimStorePlain]: treesize reduction 30, result has 68.8 percent of original size [2021-06-05 04:49:09,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:09,895 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:09,938 INFO L628 ElimStorePlain]: treesize reduction 24, result has 61.3 percent of original size [2021-06-05 04:49:09,938 INFO L518 ElimStorePlain]: Eliminatee v_prenex_120 vanished before elimination [2021-06-05 04:49:09,939 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-05 04:49:09,939 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:99, output treesize:33 [2021-06-05 04:49:10,116 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_122, v_prenex_124, v_prenex_123, ends_with_10], 1=[ends_with_2]} [2021-06-05 04:49:10,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:10,120 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:10,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:10,125 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:10,282 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2021-06-05 04:49:10,283 INFO L628 ElimStorePlain]: treesize reduction 79, result has 69.0 percent of original size [2021-06-05 04:49:10,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:10,287 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:10,426 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-06-05 04:49:10,426 INFO L628 ElimStorePlain]: treesize reduction 4, result has 97.7 percent of original size [2021-06-05 04:49:10,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:10,430 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:10,548 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-06-05 04:49:10,549 INFO L628 ElimStorePlain]: treesize reduction 25, result has 84.8 percent of original size [2021-06-05 04:49:10,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:10,552 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:10,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:10,556 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:10,663 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 35 [2021-06-05 04:49:10,664 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.2 percent of original size [2021-06-05 04:49:10,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:10,668 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:10,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:10,671 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:10,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:10,675 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:10,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:10,678 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:10,755 INFO L628 ElimStorePlain]: treesize reduction 25, result has 78.4 percent of original size [2021-06-05 04:49:10,757 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 5 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:49:10,757 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 7 variables, input treesize:261, output treesize:57 [2021-06-05 04:49:10,867 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:49:10,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317569747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:10,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:49:10,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-05 04:49:10,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569513609] [2021-06-05 04:49:10,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:49:10,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:49:10,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:49:10,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:49:10,868 INFO L87 Difference]: Start difference. First operand 710 states and 2248 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:11,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:49:11,825 INFO L93 Difference]: Finished difference Result 1008 states and 3166 transitions. [2021-06-05 04:49:11,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:49:11,825 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:49:11,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:49:11,826 INFO L225 Difference]: With dead ends: 1008 [2021-06-05 04:49:11,826 INFO L226 Difference]: Without dead ends: 963 [2021-06-05 04:49:11,826 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 889.5ms TimeCoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:49:11,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2021-06-05 04:49:11,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 729. [2021-06-05 04:49:11,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 729 states, 728 states have (on average 3.168956043956044) internal successors, (2307), 728 states have internal predecessors, (2307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:11,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 729 states to 729 states and 2307 transitions. [2021-06-05 04:49:11,834 INFO L78 Accepts]: Start accepts. Automaton has 729 states and 2307 transitions. Word has length 23 [2021-06-05 04:49:11,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:49:11,834 INFO L482 AbstractCegarLoop]: Abstraction has 729 states and 2307 transitions. [2021-06-05 04:49:11,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:11,834 INFO L276 IsEmpty]: Start isEmpty. Operand 729 states and 2307 transitions. [2021-06-05 04:49:11,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:49:11,835 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:49:11,835 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:49:12,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3670 [2021-06-05 04:49:12,035 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:49:12,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:49:12,035 INFO L82 PathProgramCache]: Analyzing trace with hash -25680630, now seen corresponding path program 225 times [2021-06-05 04:49:12,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:49:12,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535420565] [2021-06-05 04:49:12,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:49:12,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:12,168 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:49:12,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:49:12,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535420565] [2021-06-05 04:49:12,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535420565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:12,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932929770] [2021-06-05 04:49:12,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:12,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:49:12,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:49:12,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:49:12,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:49:12,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:12,339 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:12,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:12,343 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:12,411 INFO L628 ElimStorePlain]: treesize reduction 26, result has 76.6 percent of original size [2021-06-05 04:49:12,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:12,414 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:12,464 INFO L628 ElimStorePlain]: treesize reduction 19, result has 76.5 percent of original size [2021-06-05 04:49:12,464 INFO L518 ElimStorePlain]: Eliminatee ends_with_10 vanished before elimination [2021-06-05 04:49:12,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:12,467 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:12,491 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:12,492 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:49:12,492 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:117, output treesize:58 [2021-06-05 04:49:12,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:12,634 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:12,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:12,638 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:12,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:12,642 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:12,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:12,647 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:12,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:12,651 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:12,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:12,655 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:12,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:12,659 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:12,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:12,663 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:12,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:12,667 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:12,670 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:12,671 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:12,816 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-06-05 04:49:12,816 INFO L628 ElimStorePlain]: treesize reduction 99, result has 64.0 percent of original size [2021-06-05 04:49:12,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:12,820 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:12,932 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2021-06-05 04:49:12,933 INFO L628 ElimStorePlain]: treesize reduction 33, result has 80.9 percent of original size [2021-06-05 04:49:12,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:12,936 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:12,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:12,940 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:12,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:12,943 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:12,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:12,947 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:13,039 INFO L628 ElimStorePlain]: treesize reduction 3, result has 97.6 percent of original size [2021-06-05 04:49:13,039 INFO L518 ElimStorePlain]: Eliminatee v_prenex_129 vanished before elimination [2021-06-05 04:49:13,041 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 04:49:13,041 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 5 variables, input treesize:341, output treesize:98 [2021-06-05 04:49:13,197 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:49:13,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932929770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:13,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:49:13,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-05 04:49:13,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481257312] [2021-06-05 04:49:13,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:49:13,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:49:13,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:49:13,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:49:13,198 INFO L87 Difference]: Start difference. First operand 729 states and 2307 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:14,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:49:14,098 INFO L93 Difference]: Finished difference Result 1261 states and 3863 transitions. [2021-06-05 04:49:14,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:49:14,098 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:49:14,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:49:14,100 INFO L225 Difference]: With dead ends: 1261 [2021-06-05 04:49:14,100 INFO L226 Difference]: Without dead ends: 1171 [2021-06-05 04:49:14,100 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 911.8ms TimeCoverageRelationStatistics Valid=159, Invalid=833, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:49:14,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1171 states. [2021-06-05 04:49:14,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1171 to 739. [2021-06-05 04:49:14,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 739 states, 738 states have (on average 3.1815718157181574) internal successors, (2348), 738 states have internal predecessors, (2348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:14,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 2348 transitions. [2021-06-05 04:49:14,109 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 2348 transitions. Word has length 23 [2021-06-05 04:49:14,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:49:14,109 INFO L482 AbstractCegarLoop]: Abstraction has 739 states and 2348 transitions. [2021-06-05 04:49:14,109 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:14,109 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 2348 transitions. [2021-06-05 04:49:14,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:49:14,110 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:49:14,110 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:49:14,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3713,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:14,310 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:49:14,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:49:14,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1587886104, now seen corresponding path program 226 times [2021-06-05 04:49:14,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:49:14,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561257592] [2021-06-05 04:49:14,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:49:14,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:14,576 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:49:14,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:49:14,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561257592] [2021-06-05 04:49:14,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561257592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:14,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420973513] [2021-06-05 04:49:14,576 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:14,671 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:49:14,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:49:14,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:49:14,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:49:14,969 INFO L446 ElimStorePlain]: Different costs {0=[ends_with_2, v_prenex_131, v_prenex_130], 1=[ends_with_6]} [2021-06-05 04:49:14,972 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:14,972 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:14,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:14,976 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:14,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:14,980 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:14,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:14,984 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:14,986 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:14,987 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:14,989 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:14,990 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:15,067 INFO L628 ElimStorePlain]: treesize reduction 117, result has 38.4 percent of original size [2021-06-05 04:49:15,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:15,070 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:15,098 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:15,099 INFO L518 ElimStorePlain]: Eliminatee v_prenex_130 vanished before elimination [2021-06-05 04:49:15,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:15,102 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:15,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:15,105 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:15,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:15,108 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:15,152 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.3 percent of original size [2021-06-05 04:49:15,154 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:49:15,154 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:293, output treesize:32 [2021-06-05 04:49:15,219 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:49:15,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420973513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:15,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:49:15,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-06-05 04:49:15,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642069027] [2021-06-05 04:49:15,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:49:15,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:49:15,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:49:15,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:49:15,220 INFO L87 Difference]: Start difference. First operand 739 states and 2348 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:16,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:49:16,130 INFO L93 Difference]: Finished difference Result 1121 states and 3462 transitions. [2021-06-05 04:49:16,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:49:16,131 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:49:16,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:49:16,132 INFO L225 Difference]: With dead ends: 1121 [2021-06-05 04:49:16,132 INFO L226 Difference]: Without dead ends: 1067 [2021-06-05 04:49:16,132 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 1024.3ms TimeCoverageRelationStatistics Valid=137, Invalid=855, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:49:16,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1067 states. [2021-06-05 04:49:16,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1067 to 751. [2021-06-05 04:49:16,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 750 states have (on average 3.1973333333333334) internal successors, (2398), 750 states have internal predecessors, (2398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:16,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 2398 transitions. [2021-06-05 04:49:16,141 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 2398 transitions. Word has length 23 [2021-06-05 04:49:16,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:49:16,141 INFO L482 AbstractCegarLoop]: Abstraction has 751 states and 2398 transitions. [2021-06-05 04:49:16,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:16,141 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 2398 transitions. [2021-06-05 04:49:16,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:49:16,142 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:49:16,142 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:49:16,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3750,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:16,343 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:49:16,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:49:16,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1571783644, now seen corresponding path program 227 times [2021-06-05 04:49:16,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:49:16,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561527583] [2021-06-05 04:49:16,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:49:16,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:16,584 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:49:16,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:49:16,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561527583] [2021-06-05 04:49:16,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561527583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:16,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113615683] [2021-06-05 04:49:16,584 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:16,691 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:49:16,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:49:16,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:49:16,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:49:16,971 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_133, v_prenex_132, ends_with_6], 1=[ends_with_2]} [2021-06-05 04:49:16,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:16,975 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:16,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:16,978 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:17,065 INFO L628 ElimStorePlain]: treesize reduction 110, result has 47.4 percent of original size [2021-06-05 04:49:17,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:17,071 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:17,126 INFO L628 ElimStorePlain]: treesize reduction 24, result has 74.7 percent of original size [2021-06-05 04:49:17,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:17,130 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:17,165 INFO L628 ElimStorePlain]: treesize reduction 25, result has 63.2 percent of original size [2021-06-05 04:49:17,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:17,168 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:17,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:17,170 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:17,184 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:17,185 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:49:17,185 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:217, output treesize:20 [2021-06-05 04:49:17,246 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:49:17,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113615683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:17,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:49:17,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-06-05 04:49:17,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739336903] [2021-06-05 04:49:17,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:49:17,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:49:17,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:49:17,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=374, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:49:17,247 INFO L87 Difference]: Start difference. First operand 751 states and 2398 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:20,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:49:20,027 INFO L93 Difference]: Finished difference Result 1322 states and 4005 transitions. [2021-06-05 04:49:20,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 04:49:20,027 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:49:20,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:49:20,029 INFO L225 Difference]: With dead ends: 1322 [2021-06-05 04:49:20,029 INFO L226 Difference]: Without dead ends: 1229 [2021-06-05 04:49:20,029 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 838 ImplicationChecksByTransitivity, 2357.1ms TimeCoverageRelationStatistics Valid=432, Invalid=3108, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 04:49:20,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1229 states. [2021-06-05 04:49:20,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1229 to 750. [2021-06-05 04:49:20,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 750 states, 749 states have (on average 3.184245660881175) internal successors, (2385), 749 states have internal predecessors, (2385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:20,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 2385 transitions. [2021-06-05 04:49:20,038 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 2385 transitions. Word has length 23 [2021-06-05 04:49:20,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:49:20,038 INFO L482 AbstractCegarLoop]: Abstraction has 750 states and 2385 transitions. [2021-06-05 04:49:20,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:20,038 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 2385 transitions. [2021-06-05 04:49:20,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:49:20,045 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:49:20,045 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:49:20,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3798,229 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:20,245 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:49:20,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:49:20,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1840314058, now seen corresponding path program 228 times [2021-06-05 04:49:20,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:49:20,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355561447] [2021-06-05 04:49:20,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:49:20,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:20,476 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:49:20,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:49:20,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355561447] [2021-06-05 04:49:20,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355561447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:20,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046272487] [2021-06-05 04:49:20,476 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:20,573 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:49:20,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:49:20,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:49:20,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:49:21,050 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_134, ends_with_6], 1=[ends_with_2]} [2021-06-05 04:49:21,053 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:21,054 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:21,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:21,058 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:21,061 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:21,061 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:21,201 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-06-05 04:49:21,202 INFO L628 ElimStorePlain]: treesize reduction 187, result has 43.7 percent of original size [2021-06-05 04:49:21,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:21,206 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:21,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:21,209 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:21,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:21,213 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:21,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:21,216 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:21,323 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 36 [2021-06-05 04:49:21,324 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.5 percent of original size [2021-06-05 04:49:21,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:21,327 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:21,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:21,331 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:21,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:21,335 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:21,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:21,338 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:21,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:21,342 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:21,430 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.1 percent of original size [2021-06-05 04:49:21,431 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 04:49:21,432 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 4 variables, input treesize:395, output treesize:65 [2021-06-05 04:49:21,560 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:49:21,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046272487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:21,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:49:21,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-06-05 04:49:21,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527335832] [2021-06-05 04:49:21,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:49:21,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:49:21,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:49:21,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:49:21,561 INFO L87 Difference]: Start difference. First operand 750 states and 2385 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:21,792 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2021-06-05 04:49:23,608 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2021-06-05 04:49:24,879 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2021-06-05 04:49:25,585 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 59 [2021-06-05 04:49:26,219 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 57 [2021-06-05 04:49:26,370 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2021-06-05 04:49:26,591 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 36 [2021-06-05 04:49:27,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:49:27,026 INFO L93 Difference]: Finished difference Result 1854 states and 5388 transitions. [2021-06-05 04:49:27,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 04:49:27,026 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:49:27,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:49:27,029 INFO L225 Difference]: With dead ends: 1854 [2021-06-05 04:49:27,029 INFO L226 Difference]: Without dead ends: 1620 [2021-06-05 04:49:27,029 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1586 ImplicationChecksByTransitivity, 4631.0ms TimeCoverageRelationStatistics Valid=659, Invalid=5041, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 04:49:27,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1620 states. [2021-06-05 04:49:27,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1620 to 812. [2021-06-05 04:49:27,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 811 states have (on average 3.256473489519112) internal successors, (2641), 811 states have internal predecessors, (2641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:27,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 2641 transitions. [2021-06-05 04:49:27,047 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 2641 transitions. Word has length 23 [2021-06-05 04:49:27,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:49:27,047 INFO L482 AbstractCegarLoop]: Abstraction has 812 states and 2641 transitions. [2021-06-05 04:49:27,047 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:27,047 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 2641 transitions. [2021-06-05 04:49:27,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:49:27,048 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:49:27,048 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:49:27,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3835 [2021-06-05 04:49:27,249 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:49:27,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:49:27,249 INFO L82 PathProgramCache]: Analyzing trace with hash -335500874, now seen corresponding path program 229 times [2021-06-05 04:49:27,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:49:27,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468422649] [2021-06-05 04:49:27,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:49:27,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:27,442 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:49:27,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:49:27,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468422649] [2021-06-05 04:49:27,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468422649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:27,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834998937] [2021-06-05 04:49:27,442 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:27,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:27,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:49:27,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:49:27,957 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_135, ends_with_6], 1=[ends_with_2]} [2021-06-05 04:49:27,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:27,961 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:27,963 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:27,964 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:28,034 INFO L628 ElimStorePlain]: treesize reduction 239, result has 22.9 percent of original size [2021-06-05 04:49:28,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:28,037 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:28,072 INFO L628 ElimStorePlain]: treesize reduction 24, result has 64.2 percent of original size [2021-06-05 04:49:28,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:28,075 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:28,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:28,078 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:28,092 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:28,092 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:49:28,092 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 4 variables, input treesize:337, output treesize:20 [2021-06-05 04:49:28,147 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:49:28,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834998937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:28,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:49:28,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-06-05 04:49:28,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606206785] [2021-06-05 04:49:28,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:49:28,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:49:28,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:49:28,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:49:28,148 INFO L87 Difference]: Start difference. First operand 812 states and 2641 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:29,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:49:29,545 INFO L93 Difference]: Finished difference Result 1104 states and 3428 transitions. [2021-06-05 04:49:29,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 04:49:29,546 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:49:29,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:49:29,547 INFO L225 Difference]: With dead ends: 1104 [2021-06-05 04:49:29,547 INFO L226 Difference]: Without dead ends: 1044 [2021-06-05 04:49:29,547 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 1224.9ms TimeCoverageRelationStatistics Valid=209, Invalid=1597, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 04:49:29,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2021-06-05 04:49:29,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 828. [2021-06-05 04:49:29,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 828 states, 827 states have (on average 3.259975816203144) internal successors, (2696), 827 states have internal predecessors, (2696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:29,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 2696 transitions. [2021-06-05 04:49:29,556 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 2696 transitions. Word has length 23 [2021-06-05 04:49:29,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:49:29,556 INFO L482 AbstractCegarLoop]: Abstraction has 828 states and 2696 transitions. [2021-06-05 04:49:29,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:29,556 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 2696 transitions. [2021-06-05 04:49:29,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:49:29,557 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:49:29,557 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:49:29,757 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3953 [2021-06-05 04:49:29,757 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:49:29,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:49:29,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1570469962, now seen corresponding path program 230 times [2021-06-05 04:49:29,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:49:29,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326548610] [2021-06-05 04:49:29,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:49:29,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:29,856 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:49:29,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:49:29,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326548610] [2021-06-05 04:49:29,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326548610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:29,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588137379] [2021-06-05 04:49:29,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:29,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:49:29,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:49:29,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:49:29,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:49:30,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:30,086 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:30,169 INFO L628 ElimStorePlain]: treesize reduction 28, result has 78.8 percent of original size [2021-06-05 04:49:30,169 INFO L518 ElimStorePlain]: Eliminatee v_prenex_137 vanished before elimination [2021-06-05 04:49:30,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:30,173 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:30,249 INFO L628 ElimStorePlain]: treesize reduction 4, result has 96.0 percent of original size [2021-06-05 04:49:30,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:30,253 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:30,312 INFO L628 ElimStorePlain]: treesize reduction 22, result has 76.3 percent of original size [2021-06-05 04:49:30,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:30,315 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:30,343 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:30,345 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 5 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 04:49:30,345 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:135, output treesize:59 [2021-06-05 04:49:30,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:30,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:30,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:49:30,765 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:30,769 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:30,769 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:30,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:30,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:30,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:49:30,774 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:30,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:30,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:49:30,778 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:30,885 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2021-06-05 04:49:30,886 INFO L628 ElimStorePlain]: treesize reduction 104, result has 50.0 percent of original size [2021-06-05 04:49:30,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:30,889 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:30,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:30,893 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:30,937 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:30,939 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 04:49:30,939 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:309, output treesize:70 [2021-06-05 04:49:31,092 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:49:31,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588137379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:31,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:49:31,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 04:49:31,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264448141] [2021-06-05 04:49:31,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:49:31,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:49:31,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:49:31,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:49:31,092 INFO L87 Difference]: Start difference. First operand 828 states and 2696 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:32,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:49:32,674 INFO L93 Difference]: Finished difference Result 1373 states and 4181 transitions. [2021-06-05 04:49:32,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 04:49:32,674 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:49:32,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:49:32,676 INFO L225 Difference]: With dead ends: 1373 [2021-06-05 04:49:32,676 INFO L226 Difference]: Without dead ends: 1225 [2021-06-05 04:49:32,676 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 1296.2ms TimeCoverageRelationStatistics Valid=182, Invalid=1378, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 04:49:32,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1225 states. [2021-06-05 04:49:32,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1225 to 850. [2021-06-05 04:49:32,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 850 states, 849 states have (on average 3.270906949352179) internal successors, (2777), 849 states have internal predecessors, (2777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:32,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 2777 transitions. [2021-06-05 04:49:32,685 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 2777 transitions. Word has length 23 [2021-06-05 04:49:32,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:49:32,685 INFO L482 AbstractCegarLoop]: Abstraction has 850 states and 2777 transitions. [2021-06-05 04:49:32,685 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:32,685 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 2777 transitions. [2021-06-05 04:49:32,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:49:32,686 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:49:32,686 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:49:32,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4049,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:32,887 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:49:32,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:49:32,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1231172060, now seen corresponding path program 231 times [2021-06-05 04:49:32,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:49:32,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378365276] [2021-06-05 04:49:32,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:49:32,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:33,041 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:49:33,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:49:33,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378365276] [2021-06-05 04:49:33,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378365276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:33,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496764324] [2021-06-05 04:49:33,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:33,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:49:33,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:49:33,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:49:33,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:49:33,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:33,222 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:33,224 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:33,225 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:33,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:33,228 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:33,310 INFO L628 ElimStorePlain]: treesize reduction 10, result has 90.9 percent of original size [2021-06-05 04:49:33,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:33,313 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:33,361 INFO L628 ElimStorePlain]: treesize reduction 41, result has 57.7 percent of original size [2021-06-05 04:49:33,362 INFO L518 ElimStorePlain]: Eliminatee ends_with_10 vanished before elimination [2021-06-05 04:49:33,362 INFO L518 ElimStorePlain]: Eliminatee v_prenex_142 vanished before elimination [2021-06-05 04:49:33,364 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 04:49:33,364 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:144, output treesize:48 [2021-06-05 04:49:33,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:33,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:33,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:49:33,682 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:33,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:33,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:33,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:49:33,686 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:33,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:33,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:33,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:49:33,692 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:33,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:33,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:33,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:49:33,696 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:33,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:33,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:49:33,699 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:33,755 INFO L628 ElimStorePlain]: treesize reduction 45, result has 55.9 percent of original size [2021-06-05 04:49:33,756 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:49:33,756 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 2 variables, input treesize:178, output treesize:41 [2021-06-05 04:49:33,834 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:49:33,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496764324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:33,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:49:33,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 04:49:33,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88115899] [2021-06-05 04:49:33,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:49:33,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:49:33,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:49:33,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:49:33,835 INFO L87 Difference]: Start difference. First operand 850 states and 2777 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:34,872 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 47 [2021-06-05 04:49:35,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:49:35,411 INFO L93 Difference]: Finished difference Result 1420 states and 4421 transitions. [2021-06-05 04:49:35,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:49:35,411 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:49:35,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:49:35,413 INFO L225 Difference]: With dead ends: 1420 [2021-06-05 04:49:35,413 INFO L226 Difference]: Without dead ends: 1359 [2021-06-05 04:49:35,414 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 1648.7ms TimeCoverageRelationStatistics Valid=226, Invalid=964, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 04:49:35,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1359 states. [2021-06-05 04:49:35,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1359 to 871. [2021-06-05 04:49:35,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 870 states have (on average 3.264367816091954) internal successors, (2840), 870 states have internal predecessors, (2840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:35,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 2840 transitions. [2021-06-05 04:49:35,424 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 2840 transitions. Word has length 23 [2021-06-05 04:49:35,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:49:35,424 INFO L482 AbstractCegarLoop]: Abstraction has 871 states and 2840 transitions. [2021-06-05 04:49:35,424 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:35,424 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 2840 transitions. [2021-06-05 04:49:35,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:49:35,425 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:49:35,425 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:49:35,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4186 [2021-06-05 04:49:35,625 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:49:35,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:49:35,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1298345444, now seen corresponding path program 232 times [2021-06-05 04:49:35,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:49:35,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111176664] [2021-06-05 04:49:35,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:49:35,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:35,770 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:49:35,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:49:35,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111176664] [2021-06-05 04:49:35,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111176664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:35,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619611539] [2021-06-05 04:49:35,771 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:35,866 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:49:35,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:49:35,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:49:35,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:49:35,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:35,948 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:36,009 INFO L628 ElimStorePlain]: treesize reduction 74, result has 47.5 percent of original size [2021-06-05 04:49:36,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:36,013 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:36,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:36,015 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:36,061 INFO L628 ElimStorePlain]: treesize reduction 4, result has 93.3 percent of original size [2021-06-05 04:49:36,061 INFO L518 ElimStorePlain]: Eliminatee v_prenex_147 vanished before elimination [2021-06-05 04:49:36,061 INFO L518 ElimStorePlain]: Eliminatee ends_with_10 vanished before elimination [2021-06-05 04:49:36,063 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 04:49:36,063 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:144, output treesize:48 [2021-06-05 04:49:36,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:36,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:36,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:49:36,628 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:36,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:36,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:36,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:49:36,634 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:36,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:36,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:36,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:49:36,640 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:36,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:36,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:49:36,644 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:36,772 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2021-06-05 04:49:36,772 INFO L628 ElimStorePlain]: treesize reduction 105, result has 54.1 percent of original size [2021-06-05 04:49:36,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:36,776 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:36,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:36,780 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:36,833 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:36,835 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 04:49:36,835 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:301, output treesize:80 [2021-06-05 04:49:36,983 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:49:36,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619611539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:36,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:49:36,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-06-05 04:49:36,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547345562] [2021-06-05 04:49:36,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:49:36,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:49:36,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:49:36,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:49:36,984 INFO L87 Difference]: Start difference. First operand 871 states and 2840 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:39,218 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 48 [2021-06-05 04:49:39,701 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 56 [2021-06-05 04:49:39,830 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2021-06-05 04:49:40,467 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2021-06-05 04:49:40,615 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 54 [2021-06-05 04:49:40,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:49:40,635 INFO L93 Difference]: Finished difference Result 1820 states and 5668 transitions. [2021-06-05 04:49:40,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 04:49:40,635 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:49:40,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:49:40,637 INFO L225 Difference]: With dead ends: 1820 [2021-06-05 04:49:40,637 INFO L226 Difference]: Without dead ends: 1637 [2021-06-05 04:49:40,638 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 3532.8ms TimeCoverageRelationStatistics Valid=624, Invalid=2916, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 04:49:40,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2021-06-05 04:49:40,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 881. [2021-06-05 04:49:40,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 881 states, 880 states have (on average 3.2738636363636364) internal successors, (2881), 880 states have internal predecessors, (2881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:40,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 881 states to 881 states and 2881 transitions. [2021-06-05 04:49:40,648 INFO L78 Accepts]: Start accepts. Automaton has 881 states and 2881 transitions. Word has length 23 [2021-06-05 04:49:40,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:49:40,649 INFO L482 AbstractCegarLoop]: Abstraction has 881 states and 2881 transitions. [2021-06-05 04:49:40,649 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:40,649 INFO L276 IsEmpty]: Start isEmpty. Operand 881 states and 2881 transitions. [2021-06-05 04:49:40,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:49:40,650 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:49:40,650 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:49:40,850 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4249,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:40,850 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:49:40,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:49:40,850 INFO L82 PathProgramCache]: Analyzing trace with hash -101275790, now seen corresponding path program 233 times [2021-06-05 04:49:40,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:49:40,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922604635] [2021-06-05 04:49:40,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:49:40,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:40,921 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:49:40,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:49:40,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922604635] [2021-06-05 04:49:40,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922604635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:40,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474771804] [2021-06-05 04:49:40,921 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:41,020 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:49:41,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:49:41,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:49:41,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:49:41,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:41,103 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:41,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:41,107 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:41,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:41,110 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:41,178 INFO L628 ElimStorePlain]: treesize reduction 24, result has 78.4 percent of original size [2021-06-05 04:49:41,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:41,182 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:41,229 INFO L628 ElimStorePlain]: treesize reduction 22, result has 73.5 percent of original size [2021-06-05 04:49:41,229 INFO L518 ElimStorePlain]: Eliminatee v_prenex_152 vanished before elimination [2021-06-05 04:49:41,231 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: 3 dim-0 vars, and 3 xjuncts. [2021-06-05 04:49:41,231 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:122, output treesize:61 [2021-06-05 04:49:41,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:41,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:41,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:49:41,546 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:41,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:41,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:41,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:49:41,550 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:41,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:41,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:41,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:49:41,554 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:41,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:41,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:49:41,558 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:41,619 INFO L628 ElimStorePlain]: treesize reduction 79, result has 42.3 percent of original size [2021-06-05 04:49:41,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:41,622 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:41,646 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:41,647 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:49:41,647 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 4 variables, input treesize:207, output treesize:33 [2021-06-05 04:49:41,710 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:49:41,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474771804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:41,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:49:41,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:49:41,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452395797] [2021-06-05 04:49:41,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:49:41,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:49:41,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:49:41,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:49:41,710 INFO L87 Difference]: Start difference. First operand 881 states and 2881 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:42,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:49:42,187 INFO L93 Difference]: Finished difference Result 1350 states and 4249 transitions. [2021-06-05 04:49:42,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:49:42,188 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:49:42,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:49:42,189 INFO L225 Difference]: With dead ends: 1350 [2021-06-05 04:49:42,189 INFO L226 Difference]: Without dead ends: 1305 [2021-06-05 04:49:42,189 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 560.7ms TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:49:42,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1305 states. [2021-06-05 04:49:42,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1305 to 896. [2021-06-05 04:49:42,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.275977653631285) internal successors, (2932), 895 states have internal predecessors, (2932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:42,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2932 transitions. [2021-06-05 04:49:42,200 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2932 transitions. Word has length 23 [2021-06-05 04:49:42,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:49:42,200 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2932 transitions. [2021-06-05 04:49:42,200 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:42,200 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2932 transitions. [2021-06-05 04:49:42,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:49:42,201 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:49:42,201 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:49:42,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4395 [2021-06-05 04:49:42,405 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:49:42,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:49:42,405 INFO L82 PathProgramCache]: Analyzing trace with hash 54833778, now seen corresponding path program 234 times [2021-06-05 04:49:42,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:49:42,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180419026] [2021-06-05 04:49:42,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:49:42,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:42,683 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:49:42,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:49:42,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180419026] [2021-06-05 04:49:42,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180419026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:42,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107916319] [2021-06-05 04:49:42,684 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:42,780 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:49:42,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:49:42,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:49:42,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:49:43,125 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_156, ends_with_10], 1=[ends_with_6]} [2021-06-05 04:49:43,129 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:43,130 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:43,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:43,134 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:43,137 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:43,137 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:43,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:43,141 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:43,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:43,146 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:43,149 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:43,149 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:43,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:43,153 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:43,156 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:43,157 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:43,160 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:43,160 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:43,163 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:43,164 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:43,178 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:43,179 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:43,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:43,185 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:43,188 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:43,189 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:43,193 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:43,194 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:43,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:43,198 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:43,306 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 35 [2021-06-05 04:49:43,307 INFO L628 ElimStorePlain]: treesize reduction 135, result has 46.9 percent of original size [2021-06-05 04:49:43,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:43,311 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:43,358 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:43,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:43,361 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:43,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:43,365 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:43,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:43,368 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:43,419 INFO L628 ElimStorePlain]: treesize reduction 46, result has 56.2 percent of original size [2021-06-05 04:49:43,420 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:49:43,420 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 4 variables, input treesize:581, output treesize:35 [2021-06-05 04:49:43,519 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:49:43,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107916319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:43,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:49:43,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-06-05 04:49:43,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077213590] [2021-06-05 04:49:43,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:49:43,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:49:43,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:49:43,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:49:43,520 INFO L87 Difference]: Start difference. First operand 896 states and 2932 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:43,702 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2021-06-05 04:49:43,861 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2021-06-05 04:49:43,998 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2021-06-05 04:49:44,189 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2021-06-05 04:49:44,381 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 61 [2021-06-05 04:49:44,676 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 52 [2021-06-05 04:49:44,890 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2021-06-05 04:49:45,372 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 49 [2021-06-05 04:49:45,503 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 52 [2021-06-05 04:49:46,979 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 64 [2021-06-05 04:49:47,582 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2021-06-05 04:49:48,198 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 57 [2021-06-05 04:49:49,042 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 63 [2021-06-05 04:49:49,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:49:49,053 INFO L93 Difference]: Finished difference Result 2106 states and 6396 transitions. [2021-06-05 04:49:49,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 04:49:49,053 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:49:49,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:49:49,056 INFO L225 Difference]: With dead ends: 2106 [2021-06-05 04:49:49,056 INFO L226 Difference]: Without dead ends: 1979 [2021-06-05 04:49:49,056 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1905 ImplicationChecksByTransitivity, 4953.4ms TimeCoverageRelationStatistics Valid=787, Invalid=5533, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 04:49:49,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1979 states. [2021-06-05 04:49:49,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1979 to 944. [2021-06-05 04:49:49,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 944 states, 943 states have (on average 3.291622481442206) internal successors, (3104), 943 states have internal predecessors, (3104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:49,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 944 states to 944 states and 3104 transitions. [2021-06-05 04:49:49,069 INFO L78 Accepts]: Start accepts. Automaton has 944 states and 3104 transitions. Word has length 23 [2021-06-05 04:49:49,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:49:49,069 INFO L482 AbstractCegarLoop]: Abstraction has 944 states and 3104 transitions. [2021-06-05 04:49:49,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:49,069 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states and 3104 transitions. [2021-06-05 04:49:49,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:49:49,070 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:49:49,070 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:49:49,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4484,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:49,271 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:49:49,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:49:49,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1457185666, now seen corresponding path program 235 times [2021-06-05 04:49:49,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:49:49,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093020109] [2021-06-05 04:49:49,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:49:49,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:49,466 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:49:49,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:49:49,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093020109] [2021-06-05 04:49:49,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093020109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:49,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903764959] [2021-06-05 04:49:49,467 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:49,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:49,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:49:49,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:49:49,925 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_157, v_prenex_159, v_prenex_158, ends_with_10], 1=[ends_with_6]} [2021-06-05 04:49:49,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:49,930 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:49,932 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:49,933 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:50,013 INFO L628 ElimStorePlain]: treesize reduction 178, result has 31.0 percent of original size [2021-06-05 04:49:50,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:50,017 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:50,075 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.7 percent of original size [2021-06-05 04:49:50,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:50,079 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:50,107 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:50,107 INFO L518 ElimStorePlain]: Eliminatee ends_with_10 vanished before elimination [2021-06-05 04:49:50,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:50,110 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:50,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:50,113 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:50,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:50,116 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:50,139 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:50,141 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 5 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:49:50,141 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 6 variables, input treesize:288, output treesize:35 [2021-06-05 04:49:50,205 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:49:50,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903764959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:50,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:49:50,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-06-05 04:49:50,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120732858] [2021-06-05 04:49:50,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:49:50,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:49:50,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:49:50,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:49:50,205 INFO L87 Difference]: Start difference. First operand 944 states and 3104 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:51,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:49:51,787 INFO L93 Difference]: Finished difference Result 1399 states and 4433 transitions. [2021-06-05 04:49:51,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 04:49:51,788 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:49:51,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:49:51,789 INFO L225 Difference]: With dead ends: 1399 [2021-06-05 04:49:51,789 INFO L226 Difference]: Without dead ends: 1345 [2021-06-05 04:49:51,790 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 1335.9ms TimeCoverageRelationStatistics Valid=236, Invalid=1656, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 04:49:51,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1345 states. [2021-06-05 04:49:51,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1345 to 928. [2021-06-05 04:49:51,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 928 states, 927 states have (on average 3.2837108953613807) internal successors, (3044), 927 states have internal predecessors, (3044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:51,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 3044 transitions. [2021-06-05 04:49:51,800 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 3044 transitions. Word has length 23 [2021-06-05 04:49:51,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:49:51,800 INFO L482 AbstractCegarLoop]: Abstraction has 928 states and 3044 transitions. [2021-06-05 04:49:51,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:51,800 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 3044 transitions. [2021-06-05 04:49:51,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:49:51,801 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:49:51,801 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:49:52,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4563 [2021-06-05 04:49:52,002 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:49:52,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:49:52,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1635109126, now seen corresponding path program 236 times [2021-06-05 04:49:52,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:49:52,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215352514] [2021-06-05 04:49:52,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:49:52,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:52,119 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:49:52,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:49:52,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215352514] [2021-06-05 04:49:52,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215352514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:52,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251304815] [2021-06-05 04:49:52,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:52,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:49:52,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:49:52,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:49:52,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:49:52,477 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:49:52,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251304815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:52,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:49:52,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 04:49:52,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500102858] [2021-06-05 04:49:52,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:49:52,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:49:52,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:49:52,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:49:52,478 INFO L87 Difference]: Start difference. First operand 928 states and 3044 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:53,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:49:53,486 INFO L93 Difference]: Finished difference Result 1707 states and 5349 transitions. [2021-06-05 04:49:53,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:49:53,486 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:49:53,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:49:53,489 INFO L225 Difference]: With dead ends: 1707 [2021-06-05 04:49:53,489 INFO L226 Difference]: Without dead ends: 1617 [2021-06-05 04:49:53,489 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 1046.4ms TimeCoverageRelationStatistics Valid=189, Invalid=933, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 04:49:53,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1617 states. [2021-06-05 04:49:53,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1617 to 952. [2021-06-05 04:49:53,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 952 states, 951 states have (on average 3.305993690851735) internal successors, (3144), 951 states have internal predecessors, (3144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:53,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 952 states to 952 states and 3144 transitions. [2021-06-05 04:49:53,500 INFO L78 Accepts]: Start accepts. Automaton has 952 states and 3144 transitions. Word has length 23 [2021-06-05 04:49:53,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:49:53,500 INFO L482 AbstractCegarLoop]: Abstraction has 952 states and 3144 transitions. [2021-06-05 04:49:53,500 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:53,500 INFO L276 IsEmpty]: Start isEmpty. Operand 952 states and 3144 transitions. [2021-06-05 04:49:53,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:49:53,501 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:49:53,501 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:49:53,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4617,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:53,702 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:49:53,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:49:53,702 INFO L82 PathProgramCache]: Analyzing trace with hash 2049337868, now seen corresponding path program 237 times [2021-06-05 04:49:53,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:49:53,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045960060] [2021-06-05 04:49:53,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:49:53,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:53,870 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:49:53,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:49:53,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045960060] [2021-06-05 04:49:53,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045960060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:53,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717833927] [2021-06-05 04:49:53,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:53,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:49:53,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:49:53,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:49:53,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:49:54,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:54,059 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:54,111 INFO L628 ElimStorePlain]: treesize reduction 30, result has 68.8 percent of original size [2021-06-05 04:49:54,111 INFO L518 ElimStorePlain]: Eliminatee v_prenex_160 vanished before elimination [2021-06-05 04:49:54,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:54,114 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:54,147 INFO L628 ElimStorePlain]: treesize reduction 24, result has 61.3 percent of original size [2021-06-05 04:49:54,149 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-05 04:49:54,149 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:99, output treesize:30 [2021-06-05 04:49:54,431 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:49:54,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717833927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:54,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:49:54,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-06-05 04:49:54,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277792369] [2021-06-05 04:49:54,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:49:54,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:49:54,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:49:54,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:49:54,432 INFO L87 Difference]: Start difference. First operand 952 states and 3144 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:55,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:49:55,307 INFO L93 Difference]: Finished difference Result 1367 states and 4382 transitions. [2021-06-05 04:49:55,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:49:55,307 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:49:55,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:49:55,309 INFO L225 Difference]: With dead ends: 1367 [2021-06-05 04:49:55,309 INFO L226 Difference]: Without dead ends: 1313 [2021-06-05 04:49:55,309 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 761.9ms TimeCoverageRelationStatistics Valid=142, Invalid=914, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:49:55,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1313 states. [2021-06-05 04:49:55,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1313 to 974. [2021-06-05 04:49:55,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 974 states, 973 states have (on average 3.3072970195272355) internal successors, (3218), 973 states have internal predecessors, (3218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:55,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 974 states to 974 states and 3218 transitions. [2021-06-05 04:49:55,319 INFO L78 Accepts]: Start accepts. Automaton has 974 states and 3218 transitions. Word has length 23 [2021-06-05 04:49:55,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:49:55,320 INFO L482 AbstractCegarLoop]: Abstraction has 974 states and 3218 transitions. [2021-06-05 04:49:55,320 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:55,320 INFO L276 IsEmpty]: Start isEmpty. Operand 974 states and 3218 transitions. [2021-06-05 04:49:55,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:49:55,321 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:49:55,321 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:49:55,521 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4631,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:55,521 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:49:55,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:49:55,522 INFO L82 PathProgramCache]: Analyzing trace with hash -344567604, now seen corresponding path program 238 times [2021-06-05 04:49:55,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:49:55,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129675256] [2021-06-05 04:49:55,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:49:55,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:55,618 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:49:55,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:49:55,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129675256] [2021-06-05 04:49:55,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129675256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:55,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284886292] [2021-06-05 04:49:55,618 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:55,716 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:49:55,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:49:55,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:49:55,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:49:55,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:55,775 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:55,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:55,778 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:55,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:55,781 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:55,849 INFO L628 ElimStorePlain]: treesize reduction 24, result has 78.4 percent of original size [2021-06-05 04:49:55,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:55,852 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:55,884 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:55,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:55,887 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:55,935 INFO L628 ElimStorePlain]: treesize reduction 19, result has 76.3 percent of original size [2021-06-05 04:49:55,937 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: 3 dim-0 vars, and 3 xjuncts. [2021-06-05 04:49:55,937 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 4 variables, input treesize:122, output treesize:61 [2021-06-05 04:49:56,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:56,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:56,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:49:56,260 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:56,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:56,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:56,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:49:56,264 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:56,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:56,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:56,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:49:56,268 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:56,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:56,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:49:56,272 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:56,339 INFO L628 ElimStorePlain]: treesize reduction 84, result has 42.9 percent of original size [2021-06-05 04:49:56,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:56,343 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:56,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:56,346 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:56,370 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:56,371 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:49:56,371 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:209, output treesize:33 [2021-06-05 04:49:56,435 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:49:56,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284886292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:56,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:49:56,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:49:56,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918849228] [2021-06-05 04:49:56,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:49:56,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:49:56,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:49:56,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:49:56,436 INFO L87 Difference]: Start difference. First operand 974 states and 3218 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:57,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:49:57,010 INFO L93 Difference]: Finished difference Result 1750 states and 5441 transitions. [2021-06-05 04:49:57,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:49:57,010 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:49:57,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:49:57,013 INFO L225 Difference]: With dead ends: 1750 [2021-06-05 04:49:57,013 INFO L226 Difference]: Without dead ends: 1627 [2021-06-05 04:49:57,013 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 673.7ms TimeCoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:49:57,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1627 states. [2021-06-05 04:49:57,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1627 to 992. [2021-06-05 04:49:57,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 992 states, 991 states have (on average 3.2986881937436934) internal successors, (3269), 991 states have internal predecessors, (3269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:57,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 3269 transitions. [2021-06-05 04:49:57,027 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 3269 transitions. Word has length 23 [2021-06-05 04:49:57,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:49:57,027 INFO L482 AbstractCegarLoop]: Abstraction has 992 states and 3269 transitions. [2021-06-05 04:49:57,027 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:57,027 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 3269 transitions. [2021-06-05 04:49:57,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:49:57,029 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:49:57,029 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:49:57,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4687,240 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:57,232 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:49:57,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:49:57,233 INFO L82 PathProgramCache]: Analyzing trace with hash -545544782, now seen corresponding path program 239 times [2021-06-05 04:49:57,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:49:57,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214383217] [2021-06-05 04:49:57,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:49:57,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:57,316 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:49:57,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:49:57,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214383217] [2021-06-05 04:49:57,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214383217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:57,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869660611] [2021-06-05 04:49:57,317 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:57,418 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:49:57,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:49:57,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:49:57,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:49:57,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:57,475 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:57,544 INFO L628 ElimStorePlain]: treesize reduction 4, result has 95.7 percent of original size [2021-06-05 04:49:57,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:57,548 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:57,600 INFO L628 ElimStorePlain]: treesize reduction 19, result has 77.4 percent of original size [2021-06-05 04:49:57,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:57,603 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:57,628 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:57,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:57,631 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:57,654 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:57,657 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 04:49:57,657 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:95, output treesize:53 [2021-06-05 04:49:57,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:57,965 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:57,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:57,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:57,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:49:57,968 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:57,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:57,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:49:57,971 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:57,995 INFO L628 ElimStorePlain]: treesize reduction 20, result has 56.5 percent of original size [2021-06-05 04:49:57,996 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:49:57,996 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:77, output treesize:20 [2021-06-05 04:49:58,045 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:49:58,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869660611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:58,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:49:58,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:49:58,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868682020] [2021-06-05 04:49:58,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:49:58,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:49:58,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:49:58,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:49:58,046 INFO L87 Difference]: Start difference. First operand 992 states and 3269 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:58,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:49:58,337 INFO L93 Difference]: Finished difference Result 1547 states and 4889 transitions. [2021-06-05 04:49:58,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:49:58,338 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:49:58,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:49:58,341 INFO L225 Difference]: With dead ends: 1547 [2021-06-05 04:49:58,341 INFO L226 Difference]: Without dead ends: 1502 [2021-06-05 04:49:58,341 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 380.2ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:49:58,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2021-06-05 04:49:58,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 992. [2021-06-05 04:49:58,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 992 states, 991 states have (on average 3.2986881937436934) internal successors, (3269), 991 states have internal predecessors, (3269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:58,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 3269 transitions. [2021-06-05 04:49:58,366 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 3269 transitions. Word has length 23 [2021-06-05 04:49:58,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:49:58,367 INFO L482 AbstractCegarLoop]: Abstraction has 992 states and 3269 transitions. [2021-06-05 04:49:58,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:58,367 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 3269 transitions. [2021-06-05 04:49:58,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:49:58,368 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:49:58,368 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:49:58,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4734,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:58,569 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:49:58,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:49:58,570 INFO L82 PathProgramCache]: Analyzing trace with hash 191678748, now seen corresponding path program 240 times [2021-06-05 04:49:58,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:49:58,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132702689] [2021-06-05 04:49:58,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:49:58,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:58,773 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:49:58,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:49:58,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132702689] [2021-06-05 04:49:58,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132702689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:58,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720309295] [2021-06-05 04:49:58,774 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:58,871 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:49:58,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:49:58,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:49:58,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:49:58,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:58,970 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:58,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:58,974 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:58,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:49:58,977 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:58,980 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:58,980 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:59,032 INFO L628 ElimStorePlain]: treesize reduction 54, result has 53.0 percent of original size [2021-06-05 04:49:59,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:49:59,035 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:59,067 INFO L628 ElimStorePlain]: treesize reduction 20, result has 65.5 percent of original size [2021-06-05 04:49:59,067 INFO L518 ElimStorePlain]: Eliminatee v_prenex_172 vanished before elimination [2021-06-05 04:49:59,068 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-05 04:49:59,069 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 4 variables, input treesize:154, output treesize:30 [2021-06-05 04:49:59,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:59,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:59,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:49:59,312 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:59,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:59,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:59,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:49:59,316 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:59,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:59,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:59,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:49:59,331 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:59,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:59,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:49:59,334 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:59,392 INFO L628 ElimStorePlain]: treesize reduction 32, result has 66.3 percent of original size [2021-06-05 04:49:59,393 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:49:59,393 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:163, output treesize:47 [2021-06-05 04:49:59,509 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:49:59,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720309295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:59,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:49:59,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-06-05 04:49:59,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77569852] [2021-06-05 04:49:59,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:49:59,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:49:59,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:49:59,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:49:59,510 INFO L87 Difference]: Start difference. First operand 992 states and 3269 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:49:59,623 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2021-06-05 04:50:02,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:50:02,193 INFO L93 Difference]: Finished difference Result 1786 states and 5586 transitions. [2021-06-05 04:50:02,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 04:50:02,194 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:50:02,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:50:02,196 INFO L225 Difference]: With dead ends: 1786 [2021-06-05 04:50:02,196 INFO L226 Difference]: Without dead ends: 1628 [2021-06-05 04:50:02,196 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 2355.6ms TimeCoverageRelationStatistics Valid=393, Invalid=2469, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 04:50:02,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1628 states. [2021-06-05 04:50:02,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1628 to 1009. [2021-06-05 04:50:02,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1009 states, 1008 states have (on average 3.3055555555555554) internal successors, (3332), 1008 states have internal predecessors, (3332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:02,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1009 states to 1009 states and 3332 transitions. [2021-06-05 04:50:02,209 INFO L78 Accepts]: Start accepts. Automaton has 1009 states and 3332 transitions. Word has length 23 [2021-06-05 04:50:02,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:50:02,209 INFO L482 AbstractCegarLoop]: Abstraction has 1009 states and 3332 transitions. [2021-06-05 04:50:02,209 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:02,209 INFO L276 IsEmpty]: Start isEmpty. Operand 1009 states and 3332 transitions. [2021-06-05 04:50:02,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:50:02,210 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:50:02,210 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:50:02,411 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4799,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:02,411 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:50:02,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:50:02,411 INFO L82 PathProgramCache]: Analyzing trace with hash -345814108, now seen corresponding path program 241 times [2021-06-05 04:50:02,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:50:02,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013735894] [2021-06-05 04:50:02,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:50:02,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:02,647 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:02,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:50:02,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013735894] [2021-06-05 04:50:02,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013735894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:02,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813174425] [2021-06-05 04:50:02,648 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:02,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:02,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:50:02,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:50:02,948 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:02,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813174425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:02,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:50:02,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2021-06-05 04:50:02,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337030985] [2021-06-05 04:50:02,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:50:02,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:50:02,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:50:02,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:50:02,949 INFO L87 Difference]: Start difference. First operand 1009 states and 3332 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:05,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:50:05,171 INFO L93 Difference]: Finished difference Result 1485 states and 4760 transitions. [2021-06-05 04:50:05,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 04:50:05,171 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:50:05,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:50:05,173 INFO L225 Difference]: With dead ends: 1485 [2021-06-05 04:50:05,173 INFO L226 Difference]: Without dead ends: 1428 [2021-06-05 04:50:05,174 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 1846.4ms TimeCoverageRelationStatistics Valid=335, Invalid=2317, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 04:50:05,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1428 states. [2021-06-05 04:50:05,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1428 to 1033. [2021-06-05 04:50:05,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1033 states, 1032 states have (on average 3.302325581395349) internal successors, (3408), 1032 states have internal predecessors, (3408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:05,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 3408 transitions. [2021-06-05 04:50:05,185 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 3408 transitions. Word has length 23 [2021-06-05 04:50:05,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:50:05,185 INFO L482 AbstractCegarLoop]: Abstraction has 1033 states and 3408 transitions. [2021-06-05 04:50:05,185 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:05,185 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 3408 transitions. [2021-06-05 04:50:05,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:50:05,186 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:50:05,186 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:50:05,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4895,243 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:05,387 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:50:05,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:50:05,387 INFO L82 PathProgramCache]: Analyzing trace with hash 602455156, now seen corresponding path program 242 times [2021-06-05 04:50:05,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:50:05,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796764264] [2021-06-05 04:50:05,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:50:05,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:05,689 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:05,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:50:05,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796764264] [2021-06-05 04:50:05,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796764264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:05,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806254755] [2021-06-05 04:50:05,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:05,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:50:05,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:50:05,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:50:05,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:50:06,112 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:06,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806254755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:06,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:50:06,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2021-06-05 04:50:06,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210154867] [2021-06-05 04:50:06,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:50:06,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:50:06,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:50:06,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=374, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:50:06,113 INFO L87 Difference]: Start difference. First operand 1033 states and 3408 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:10,720 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 43 [2021-06-05 04:50:11,277 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 43 [2021-06-05 04:50:11,733 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 39 [2021-06-05 04:50:12,454 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 38 [2021-06-05 04:50:12,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:50:12,591 INFO L93 Difference]: Finished difference Result 2426 states and 7114 transitions. [2021-06-05 04:50:12,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-06-05 04:50:12,591 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:50:12,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:50:12,594 INFO L225 Difference]: With dead ends: 2426 [2021-06-05 04:50:12,594 INFO L226 Difference]: Without dead ends: 2105 [2021-06-05 04:50:12,594 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4198 ImplicationChecksByTransitivity, 5257.1ms TimeCoverageRelationStatistics Valid=895, Invalid=11095, Unknown=0, NotChecked=0, Total=11990 [2021-06-05 04:50:12,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2105 states. [2021-06-05 04:50:12,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2105 to 1097. [2021-06-05 04:50:12,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1097 states, 1096 states have (on average 3.31478102189781) internal successors, (3633), 1096 states have internal predecessors, (3633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:12,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1097 states to 1097 states and 3633 transitions. [2021-06-05 04:50:12,610 INFO L78 Accepts]: Start accepts. Automaton has 1097 states and 3633 transitions. Word has length 23 [2021-06-05 04:50:12,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:50:12,610 INFO L482 AbstractCegarLoop]: Abstraction has 1097 states and 3633 transitions. [2021-06-05 04:50:12,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:12,610 INFO L276 IsEmpty]: Start isEmpty. Operand 1097 states and 3633 transitions. [2021-06-05 04:50:12,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:50:12,611 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:50:12,611 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:50:12,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4909 [2021-06-05 04:50:12,812 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:50:12,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:50:12,812 INFO L82 PathProgramCache]: Analyzing trace with hash 298857606, now seen corresponding path program 243 times [2021-06-05 04:50:12,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:50:12,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440308204] [2021-06-05 04:50:12,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:50:12,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:13,008 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:13,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:50:13,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440308204] [2021-06-05 04:50:13,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440308204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:13,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934108358] [2021-06-05 04:50:13,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:13,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:50:13,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:50:13,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:50:13,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:50:13,239 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:50:13,240 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:13,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:50:13,244 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:13,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:50:13,247 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:13,301 INFO L628 ElimStorePlain]: treesize reduction 30, result has 67.0 percent of original size [2021-06-05 04:50:13,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:50:13,304 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:13,336 INFO L628 ElimStorePlain]: treesize reduction 20, result has 65.5 percent of original size [2021-06-05 04:50:13,337 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-05 04:50:13,338 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:127, output treesize:30 [2021-06-05 04:50:13,605 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:13,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934108358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:13,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:50:13,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-06-05 04:50:13,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974959430] [2021-06-05 04:50:13,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:50:13,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:50:13,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:50:13,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:50:13,606 INFO L87 Difference]: Start difference. First operand 1097 states and 3633 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:15,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:50:15,345 INFO L93 Difference]: Finished difference Result 1772 states and 5608 transitions. [2021-06-05 04:50:15,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 04:50:15,346 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:50:15,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:50:15,348 INFO L225 Difference]: With dead ends: 1772 [2021-06-05 04:50:15,348 INFO L226 Difference]: Without dead ends: 1670 [2021-06-05 04:50:15,348 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 1379.3ms TimeCoverageRelationStatistics Valid=239, Invalid=2113, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 04:50:15,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1670 states. [2021-06-05 04:50:15,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1670 to 1102. [2021-06-05 04:50:15,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1102 states, 1101 states have (on average 3.31244323342416) internal successors, (3647), 1101 states have internal predecessors, (3647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:15,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1102 states to 1102 states and 3647 transitions. [2021-06-05 04:50:15,362 INFO L78 Accepts]: Start accepts. Automaton has 1102 states and 3647 transitions. Word has length 23 [2021-06-05 04:50:15,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:50:15,362 INFO L482 AbstractCegarLoop]: Abstraction has 1102 states and 3647 transitions. [2021-06-05 04:50:15,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:15,362 INFO L276 IsEmpty]: Start isEmpty. Operand 1102 states and 3647 transitions. [2021-06-05 04:50:15,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:50:15,363 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:50:15,363 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:50:15,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4923 [2021-06-05 04:50:15,564 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:50:15,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:50:15,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1212178272, now seen corresponding path program 244 times [2021-06-05 04:50:15,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:50:15,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165865744] [2021-06-05 04:50:15,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:50:15,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:15,811 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:15,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:50:15,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165865744] [2021-06-05 04:50:15,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165865744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:15,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579808662] [2021-06-05 04:50:15,812 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:15,911 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:50:15,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:50:15,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:50:15,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:50:16,229 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:16,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579808662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:16,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:50:16,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-06-05 04:50:16,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051582322] [2021-06-05 04:50:16,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:50:16,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:50:16,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:50:16,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:50:16,230 INFO L87 Difference]: Start difference. First operand 1102 states and 3647 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:16,598 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2021-06-05 04:50:18,841 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 62 [2021-06-05 04:50:19,753 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2021-06-05 04:50:20,413 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-06-05 04:50:21,123 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 54 [2021-06-05 04:50:21,399 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65 [2021-06-05 04:50:21,679 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 68 [2021-06-05 04:50:22,094 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-06-05 04:50:22,711 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2021-06-05 04:50:23,039 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 63 [2021-06-05 04:50:23,350 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2021-06-05 04:50:23,680 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2021-06-05 04:50:24,233 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2021-06-05 04:50:24,480 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2021-06-05 04:50:25,041 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 52 [2021-06-05 04:50:25,679 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 65 [2021-06-05 04:50:25,835 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2021-06-05 04:50:25,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:50:25,838 INFO L93 Difference]: Finished difference Result 2858 states and 8256 transitions. [2021-06-05 04:50:25,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2021-06-05 04:50:25,838 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:50:25,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:50:25,842 INFO L225 Difference]: With dead ends: 2858 [2021-06-05 04:50:25,842 INFO L226 Difference]: Without dead ends: 2444 [2021-06-05 04:50:25,842 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5806 ImplicationChecksByTransitivity, 8263.5ms TimeCoverageRelationStatistics Valid=1328, Invalid=15184, Unknown=0, NotChecked=0, Total=16512 [2021-06-05 04:50:25,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2444 states. [2021-06-05 04:50:25,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2444 to 1160. [2021-06-05 04:50:25,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1160 states, 1159 states have (on average 3.3339085418464194) internal successors, (3864), 1159 states have internal predecessors, (3864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:25,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1160 states to 1160 states and 3864 transitions. [2021-06-05 04:50:25,860 INFO L78 Accepts]: Start accepts. Automaton has 1160 states and 3864 transitions. Word has length 23 [2021-06-05 04:50:25,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:50:25,860 INFO L482 AbstractCegarLoop]: Abstraction has 1160 states and 3864 transitions. [2021-06-05 04:50:25,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:25,860 INFO L276 IsEmpty]: Start isEmpty. Operand 1160 states and 3864 transitions. [2021-06-05 04:50:25,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:50:25,861 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:50:25,861 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:50:26,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4964,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:26,062 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:50:26,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:50:26,062 INFO L82 PathProgramCache]: Analyzing trace with hash -235280272, now seen corresponding path program 245 times [2021-06-05 04:50:26,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:50:26,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662658836] [2021-06-05 04:50:26,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:50:26,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:26,248 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:26,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:50:26,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662658836] [2021-06-05 04:50:26,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662658836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:26,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914366361] [2021-06-05 04:50:26,249 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:26,350 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:50:26,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:50:26,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 04:50:26,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:50:26,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:50:26,447 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:26,561 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 35 [2021-06-05 04:50:26,561 INFO L628 ElimStorePlain]: treesize reduction 4, result has 96.9 percent of original size [2021-06-05 04:50:26,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:50:26,566 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:26,615 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:26,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:50:26,619 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:26,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:50:26,622 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:26,679 INFO L628 ElimStorePlain]: treesize reduction 49, result has 57.0 percent of original size [2021-06-05 04:50:26,679 INFO L518 ElimStorePlain]: Eliminatee v_prenex_174 vanished before elimination [2021-06-05 04:50:26,681 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 04:50:26,681 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:132, output treesize:57 [2021-06-05 04:50:27,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:27,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:27,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:50:27,212 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:27,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:27,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:27,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:50:27,219 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:27,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:27,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:27,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:50:27,225 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:27,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:27,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:27,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:50:27,231 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:27,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:27,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:50:27,237 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:27,412 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2021-06-05 04:50:27,412 INFO L628 ElimStorePlain]: treesize reduction 153, result has 44.8 percent of original size [2021-06-05 04:50:27,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:50:27,418 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:27,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:50:27,423 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:27,497 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:27,499 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 04:50:27,499 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 4 variables, input treesize:363, output treesize:80 [2021-06-05 04:50:27,650 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:27,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914366361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:27,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:50:27,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-06-05 04:50:27,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563420472] [2021-06-05 04:50:27,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:50:27,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:50:27,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:50:27,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:50:27,651 INFO L87 Difference]: Start difference. First operand 1160 states and 3864 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:28,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:50:28,693 INFO L93 Difference]: Finished difference Result 1864 states and 5964 transitions. [2021-06-05 04:50:28,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:50:28,693 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:50:28,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:50:28,696 INFO L225 Difference]: With dead ends: 1864 [2021-06-05 04:50:28,696 INFO L226 Difference]: Without dead ends: 1756 [2021-06-05 04:50:28,696 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 1056.1ms TimeCoverageRelationStatistics Valid=149, Invalid=907, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:50:28,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1756 states. [2021-06-05 04:50:28,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1756 to 1159. [2021-06-05 04:50:28,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1159 states, 1158 states have (on average 3.3367875647668392) internal successors, (3864), 1158 states have internal predecessors, (3864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:28,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1159 states to 1159 states and 3864 transitions. [2021-06-05 04:50:28,709 INFO L78 Accepts]: Start accepts. Automaton has 1159 states and 3864 transitions. Word has length 23 [2021-06-05 04:50:28,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:50:28,709 INFO L482 AbstractCegarLoop]: Abstraction has 1159 states and 3864 transitions. [2021-06-05 04:50:28,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:28,709 INFO L276 IsEmpty]: Start isEmpty. Operand 1159 states and 3864 transitions. [2021-06-05 04:50:28,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:50:28,710 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:50:28,711 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:50:28,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4985,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:28,911 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:50:28,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:50:28,911 INFO L82 PathProgramCache]: Analyzing trace with hash -602834382, now seen corresponding path program 246 times [2021-06-05 04:50:28,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:50:28,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37333857] [2021-06-05 04:50:28,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:50:28,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:29,173 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:29,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:50:29,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37333857] [2021-06-05 04:50:29,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37333857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:29,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852079699] [2021-06-05 04:50:29,174 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:29,277 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:50:29,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:50:29,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:50:29,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:50:29,624 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:50:29,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852079699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:29,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:50:29,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-06-05 04:50:29,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260350955] [2021-06-05 04:50:29,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:50:29,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:50:29,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:50:29,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:50:29,625 INFO L87 Difference]: Start difference. First operand 1159 states and 3864 transitions. Second operand has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:32,455 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-06-05 04:50:33,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:50:33,622 INFO L93 Difference]: Finished difference Result 2013 states and 6213 transitions. [2021-06-05 04:50:33,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 04:50:33,622 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:50:33,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:50:33,625 INFO L225 Difference]: With dead ends: 2013 [2021-06-05 04:50:33,625 INFO L226 Difference]: Without dead ends: 1908 [2021-06-05 04:50:33,625 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1630 ImplicationChecksByTransitivity, 3540.6ms TimeCoverageRelationStatistics Valid=633, Invalid=4917, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 04:50:33,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1908 states. [2021-06-05 04:50:33,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1908 to 1171. [2021-06-05 04:50:33,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1171 states, 1170 states have (on average 3.341025641025641) internal successors, (3909), 1170 states have internal predecessors, (3909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:33,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1171 states to 1171 states and 3909 transitions. [2021-06-05 04:50:33,640 INFO L78 Accepts]: Start accepts. Automaton has 1171 states and 3909 transitions. Word has length 23 [2021-06-05 04:50:33,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:50:33,640 INFO L482 AbstractCegarLoop]: Abstraction has 1171 states and 3909 transitions. [2021-06-05 04:50:33,640 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:33,640 INFO L276 IsEmpty]: Start isEmpty. Operand 1171 states and 3909 transitions. [2021-06-05 04:50:33,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:50:33,641 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:50:33,641 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:50:33,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5126,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:33,841 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:50:33,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:50:33,842 INFO L82 PathProgramCache]: Analyzing trace with hash -893034992, now seen corresponding path program 247 times [2021-06-05 04:50:33,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:50:33,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866237070] [2021-06-05 04:50:33,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:50:33,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:34,011 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:34,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:50:34,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866237070] [2021-06-05 04:50:34,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866237070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:34,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637928550] [2021-06-05 04:50:34,012 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:34,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:34,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 04:50:34,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:50:34,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:50:34,504 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:34,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:34,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:34,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:50:34,509 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:34,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:50:34,512 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:34,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:50:34,517 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:34,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:50:34,521 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:34,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:50:34,524 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:34,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:34,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:50:34,529 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:34,677 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-06-05 04:50:34,677 INFO L628 ElimStorePlain]: treesize reduction 63, result has 70.3 percent of original size [2021-06-05 04:50:34,683 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 6 xjuncts. [2021-06-05 04:50:34,683 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 4 variables, input treesize:271, output treesize:123 [2021-06-05 04:50:35,374 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:35,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637928550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:35,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:50:35,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-06-05 04:50:35,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611111106] [2021-06-05 04:50:35,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:50:35,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:50:35,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:50:35,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:50:35,375 INFO L87 Difference]: Start difference. First operand 1171 states and 3909 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:37,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:50:37,145 INFO L93 Difference]: Finished difference Result 1732 states and 5482 transitions. [2021-06-05 04:50:37,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 04:50:37,145 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:50:37,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:50:37,148 INFO L225 Difference]: With dead ends: 1732 [2021-06-05 04:50:37,148 INFO L226 Difference]: Without dead ends: 1627 [2021-06-05 04:50:37,148 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 1578.3ms TimeCoverageRelationStatistics Valid=238, Invalid=1924, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 04:50:37,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1627 states. [2021-06-05 04:50:37,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1627 to 1188. [2021-06-05 04:50:37,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1188 states, 1187 states have (on average 3.3445661331086773) internal successors, (3970), 1187 states have internal predecessors, (3970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:37,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1188 states to 1188 states and 3970 transitions. [2021-06-05 04:50:37,165 INFO L78 Accepts]: Start accepts. Automaton has 1188 states and 3970 transitions. Word has length 23 [2021-06-05 04:50:37,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:50:37,165 INFO L482 AbstractCegarLoop]: Abstraction has 1188 states and 3970 transitions. [2021-06-05 04:50:37,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:37,165 INFO L276 IsEmpty]: Start isEmpty. Operand 1188 states and 3970 transitions. [2021-06-05 04:50:37,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:50:37,166 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:50:37,166 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:50:37,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5142 [2021-06-05 04:50:37,367 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:50:37,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:50:37,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1872595910, now seen corresponding path program 248 times [2021-06-05 04:50:37,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:50:37,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392902123] [2021-06-05 04:50:37,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:50:37,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:37,521 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:50:37,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:50:37,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392902123] [2021-06-05 04:50:37,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392902123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:37,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257891661] [2021-06-05 04:50:37,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:37,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:50:37,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:50:37,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:50:37,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:50:37,934 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:50:37,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257891661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:37,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:50:37,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 04:50:37,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922955558] [2021-06-05 04:50:37,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:50:37,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:50:37,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:50:37,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:50:37,935 INFO L87 Difference]: Start difference. First operand 1188 states and 3970 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:43,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:50:43,179 INFO L93 Difference]: Finished difference Result 2749 states and 8424 transitions. [2021-06-05 04:50:43,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-06-05 04:50:43,180 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:50:43,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:50:43,183 INFO L225 Difference]: With dead ends: 2749 [2021-06-05 04:50:43,183 INFO L226 Difference]: Without dead ends: 2512 [2021-06-05 04:50:43,184 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2204 ImplicationChecksByTransitivity, 4598.0ms TimeCoverageRelationStatistics Valid=715, Invalid=6091, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 04:50:43,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2512 states. [2021-06-05 04:50:43,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2512 to 1296. [2021-06-05 04:50:43,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1296 states, 1295 states have (on average 3.4308880308880307) internal successors, (4443), 1295 states have internal predecessors, (4443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:43,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1296 states to 1296 states and 4443 transitions. [2021-06-05 04:50:43,202 INFO L78 Accepts]: Start accepts. Automaton has 1296 states and 4443 transitions. Word has length 23 [2021-06-05 04:50:43,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:50:43,202 INFO L482 AbstractCegarLoop]: Abstraction has 1296 states and 4443 transitions. [2021-06-05 04:50:43,202 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:43,202 INFO L276 IsEmpty]: Start isEmpty. Operand 1296 states and 4443 transitions. [2021-06-05 04:50:43,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:50:43,203 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:50:43,203 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:50:43,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5275 [2021-06-05 04:50:43,404 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:50:43,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:50:43,404 INFO L82 PathProgramCache]: Analyzing trace with hash -88296408, now seen corresponding path program 249 times [2021-06-05 04:50:43,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:50:43,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123459730] [2021-06-05 04:50:43,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:50:43,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:43,551 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:50:43,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:50:43,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123459730] [2021-06-05 04:50:43,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123459730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:43,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525961088] [2021-06-05 04:50:43,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:43,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:50:43,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:50:43,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 04:50:43,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:50:44,048 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2021-06-05 04:50:44,321 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:44,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525961088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:44,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:50:44,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2021-06-05 04:50:44,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950913947] [2021-06-05 04:50:44,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:50:44,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:50:44,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:50:44,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:50:44,322 INFO L87 Difference]: Start difference. First operand 1296 states and 4443 transitions. Second operand has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:46,493 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2021-06-05 04:50:46,970 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2021-06-05 04:50:47,212 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2021-06-05 04:50:47,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:50:47,750 INFO L93 Difference]: Finished difference Result 2273 states and 7227 transitions. [2021-06-05 04:50:47,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 04:50:47,750 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:50:47,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:50:47,753 INFO L225 Difference]: With dead ends: 2273 [2021-06-05 04:50:47,753 INFO L226 Difference]: Without dead ends: 2091 [2021-06-05 04:50:47,754 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 951 ImplicationChecksByTransitivity, 3305.7ms TimeCoverageRelationStatistics Valid=409, Invalid=3131, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 04:50:47,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2091 states. [2021-06-05 04:50:47,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2091 to 1342. [2021-06-05 04:50:47,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1342 states, 1341 states have (on average 3.41834451901566) internal successors, (4584), 1341 states have internal predecessors, (4584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:47,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1342 states to 1342 states and 4584 transitions. [2021-06-05 04:50:47,770 INFO L78 Accepts]: Start accepts. Automaton has 1342 states and 4584 transitions. Word has length 23 [2021-06-05 04:50:47,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:50:47,770 INFO L482 AbstractCegarLoop]: Abstraction has 1342 states and 4584 transitions. [2021-06-05 04:50:47,770 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:47,770 INFO L276 IsEmpty]: Start isEmpty. Operand 1342 states and 4584 transitions. [2021-06-05 04:50:47,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:50:47,772 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:50:47,772 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:50:47,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5295 [2021-06-05 04:50:47,972 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:50:47,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:50:47,973 INFO L82 PathProgramCache]: Analyzing trace with hash 2075591694, now seen corresponding path program 250 times [2021-06-05 04:50:47,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:50:47,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263547158] [2021-06-05 04:50:47,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:50:47,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:48,075 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:48,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:50:48,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263547158] [2021-06-05 04:50:48,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263547158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:48,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710028156] [2021-06-05 04:50:48,075 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:48,174 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:50:48,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:50:48,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:50:48,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:50:48,226 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:50:48,227 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:48,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:50:48,230 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:48,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:50:48,233 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:48,282 INFO L628 ElimStorePlain]: treesize reduction 32, result has 67.7 percent of original size [2021-06-05 04:50:48,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:50:48,285 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:48,317 INFO L628 ElimStorePlain]: treesize reduction 22, result has 65.6 percent of original size [2021-06-05 04:50:48,319 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-05 04:50:48,319 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:137, output treesize:35 [2021-06-05 04:50:48,585 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_187, ends_with_10, v_prenex_186, v_prenex_185], 1=[ends_with_2]} [2021-06-05 04:50:48,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:50:48,590 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:48,593 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:50:48,593 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:48,711 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2021-06-05 04:50:48,712 INFO L628 ElimStorePlain]: treesize reduction 66, result has 65.8 percent of original size [2021-06-05 04:50:48,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:50:48,715 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:48,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:50:48,719 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:48,769 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:48,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:50:48,773 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:48,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:50:48,776 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:48,867 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.1 percent of original size [2021-06-05 04:50:48,867 INFO L518 ElimStorePlain]: Eliminatee v_prenex_185 vanished before elimination [2021-06-05 04:50:48,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:50:48,871 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:48,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:50:48,874 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:48,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:50:48,877 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:48,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:50:48,880 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:48,944 INFO L628 ElimStorePlain]: treesize reduction 22, result has 77.3 percent of original size [2021-06-05 04:50:48,946 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 5 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:50:48,946 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 7 variables, input treesize:229, output treesize:45 [2021-06-05 04:50:49,008 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:49,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710028156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:49,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:50:49,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 04:50:49,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430055396] [2021-06-05 04:50:49,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:50:49,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:50:49,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:50:49,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:50:49,008 INFO L87 Difference]: Start difference. First operand 1342 states and 4584 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:49,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:50:49,363 INFO L93 Difference]: Finished difference Result 1665 states and 5536 transitions. [2021-06-05 04:50:49,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:50:49,364 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:50:49,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:50:49,366 INFO L225 Difference]: With dead ends: 1665 [2021-06-05 04:50:49,366 INFO L226 Difference]: Without dead ends: 1620 [2021-06-05 04:50:49,366 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 433.5ms TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:50:49,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1620 states. [2021-06-05 04:50:49,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1620 to 1277. [2021-06-05 04:50:49,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1277 states, 1276 states have (on average 3.4130094043887147) internal successors, (4355), 1276 states have internal predecessors, (4355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:49,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1277 states to 1277 states and 4355 transitions. [2021-06-05 04:50:49,379 INFO L78 Accepts]: Start accepts. Automaton has 1277 states and 4355 transitions. Word has length 23 [2021-06-05 04:50:49,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:50:49,379 INFO L482 AbstractCegarLoop]: Abstraction has 1277 states and 4355 transitions. [2021-06-05 04:50:49,379 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:49,379 INFO L276 IsEmpty]: Start isEmpty. Operand 1277 states and 4355 transitions. [2021-06-05 04:50:49,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:50:49,381 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:50:49,381 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:50:49,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5320 [2021-06-05 04:50:49,581 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:50:49,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:50:49,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1184269814, now seen corresponding path program 251 times [2021-06-05 04:50:49,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:50:49,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029531093] [2021-06-05 04:50:49,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:50:49,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:49,709 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:49,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:50:49,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029531093] [2021-06-05 04:50:49,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029531093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:49,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596251770] [2021-06-05 04:50:49,709 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:49,812 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:50:49,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:50:49,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:50:49,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:50:49,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:50:49,916 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:49,981 INFO L628 ElimStorePlain]: treesize reduction 28, result has 73.1 percent of original size [2021-06-05 04:50:49,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:50:49,985 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:49,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:50:49,990 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:50,044 INFO L628 ElimStorePlain]: treesize reduction 4, result has 94.2 percent of original size [2021-06-05 04:50:50,046 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 04:50:50,046 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:107, output treesize:57 [2021-06-05 04:50:50,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:50,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:50,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:50:50,351 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:50,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:50,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:50,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:50:50,357 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:50,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:50,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:50,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:50:50,362 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:50,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:50,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:50,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:50:50,366 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:50,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:50,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:50:50,369 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:50,426 INFO L628 ElimStorePlain]: treesize reduction 45, result has 55.9 percent of original size [2021-06-05 04:50:50,427 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:50:50,427 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 2 variables, input treesize:178, output treesize:41 [2021-06-05 04:50:50,517 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:50:50,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596251770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:50,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:50:50,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-06-05 04:50:50,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609576061] [2021-06-05 04:50:50,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:50:50,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:50:50,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:50:50,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:50:50,517 INFO L87 Difference]: Start difference. First operand 1277 states and 4355 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:50,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:50:50,908 INFO L93 Difference]: Finished difference Result 1650 states and 5508 transitions. [2021-06-05 04:50:50,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:50:50,908 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:50:50,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:50:50,910 INFO L225 Difference]: With dead ends: 1650 [2021-06-05 04:50:50,910 INFO L226 Difference]: Without dead ends: 1596 [2021-06-05 04:50:50,910 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 472.4ms TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:50:50,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1596 states. [2021-06-05 04:50:50,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1596 to 1256. [2021-06-05 04:50:50,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1256 states, 1255 states have (on average 3.4087649402390436) internal successors, (4278), 1255 states have internal predecessors, (4278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:50,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1256 states to 1256 states and 4278 transitions. [2021-06-05 04:50:50,924 INFO L78 Accepts]: Start accepts. Automaton has 1256 states and 4278 transitions. Word has length 23 [2021-06-05 04:50:50,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:50:50,924 INFO L482 AbstractCegarLoop]: Abstraction has 1256 states and 4278 transitions. [2021-06-05 04:50:50,924 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:50,924 INFO L276 IsEmpty]: Start isEmpty. Operand 1256 states and 4278 transitions. [2021-06-05 04:50:50,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:50:50,926 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:50:50,926 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:50:51,126 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5367,253 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:51,126 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:50:51,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:50:51,126 INFO L82 PathProgramCache]: Analyzing trace with hash 2108940534, now seen corresponding path program 252 times [2021-06-05 04:50:51,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:50:51,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076179628] [2021-06-05 04:50:51,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:50:51,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:51,379 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:51,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:50:51,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076179628] [2021-06-05 04:50:51,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076179628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:51,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245303623] [2021-06-05 04:50:51,380 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:51,492 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:50:51,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:50:51,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:50:51,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:50:51,707 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:50:51,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245303623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:51,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:50:51,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-06-05 04:50:51,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575503619] [2021-06-05 04:50:51,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:50:51,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:50:51,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:50:51,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:50:51,708 INFO L87 Difference]: Start difference. First operand 1256 states and 4278 transitions. Second operand has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:52,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:50:52,830 INFO L93 Difference]: Finished difference Result 1604 states and 5367 transitions. [2021-06-05 04:50:52,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:50:52,830 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:50:52,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:50:52,833 INFO L225 Difference]: With dead ends: 1604 [2021-06-05 04:50:52,833 INFO L226 Difference]: Without dead ends: 1538 [2021-06-05 04:50:52,833 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 1008.1ms TimeCoverageRelationStatistics Valid=177, Invalid=1155, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 04:50:52,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1538 states. [2021-06-05 04:50:52,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1538 to 1259. [2021-06-05 04:50:52,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1259 states, 1258 states have (on average 3.4054054054054053) internal successors, (4284), 1258 states have internal predecessors, (4284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:52,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1259 states to 1259 states and 4284 transitions. [2021-06-05 04:50:52,848 INFO L78 Accepts]: Start accepts. Automaton has 1259 states and 4284 transitions. Word has length 23 [2021-06-05 04:50:52,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:50:52,849 INFO L482 AbstractCegarLoop]: Abstraction has 1259 states and 4284 transitions. [2021-06-05 04:50:52,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:52,849 INFO L276 IsEmpty]: Start isEmpty. Operand 1259 states and 4284 transitions. [2021-06-05 04:50:52,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:50:52,850 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:50:52,850 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:50:53,050 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5453,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:53,051 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:50:53,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:50:53,051 INFO L82 PathProgramCache]: Analyzing trace with hash -930834746, now seen corresponding path program 253 times [2021-06-05 04:50:53,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:50:53,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680310316] [2021-06-05 04:50:53,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:50:53,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:53,328 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:50:53,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:50:53,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680310316] [2021-06-05 04:50:53,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680310316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:53,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465647023] [2021-06-05 04:50:53,328 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:53,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:53,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:50:53,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:50:53,730 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:50:53,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465647023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:53,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:50:53,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-06-05 04:50:53,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286244616] [2021-06-05 04:50:53,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:50:53,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:50:53,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:50:53,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:50:53,731 INFO L87 Difference]: Start difference. First operand 1259 states and 4284 transitions. Second operand has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:50:54,238 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2021-06-05 04:50:56,475 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 56 [2021-06-05 04:50:57,131 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2021-06-05 04:50:57,413 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 54 [2021-06-05 04:50:57,559 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2021-06-05 04:50:58,265 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 46 [2021-06-05 04:50:58,407 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2021-06-05 04:50:58,652 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 51 [2021-06-05 04:50:58,993 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2021-06-05 04:50:59,477 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2021-06-05 04:50:59,661 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-06-05 04:50:59,806 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2021-06-05 04:51:00,022 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2021-06-05 04:51:00,261 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2021-06-05 04:51:00,441 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2021-06-05 04:51:00,671 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2021-06-05 04:51:00,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:00,830 INFO L93 Difference]: Finished difference Result 2846 states and 8745 transitions. [2021-06-05 04:51:00,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-05 04:51:00,830 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:51:00,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:00,833 INFO L225 Difference]: With dead ends: 2846 [2021-06-05 04:51:00,833 INFO L226 Difference]: Without dead ends: 2537 [2021-06-05 04:51:00,834 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2567 ImplicationChecksByTransitivity, 6212.6ms TimeCoverageRelationStatistics Valid=913, Invalid=7097, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 04:51:00,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2537 states. [2021-06-05 04:51:00,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2537 to 1324. [2021-06-05 04:51:00,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1324 states, 1323 states have (on average 3.4640967498110355) internal successors, (4583), 1323 states have internal predecessors, (4583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:00,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1324 states to 1324 states and 4583 transitions. [2021-06-05 04:51:00,853 INFO L78 Accepts]: Start accepts. Automaton has 1324 states and 4583 transitions. Word has length 23 [2021-06-05 04:51:00,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:00,853 INFO L482 AbstractCegarLoop]: Abstraction has 1324 states and 4583 transitions. [2021-06-05 04:51:00,853 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:00,853 INFO L276 IsEmpty]: Start isEmpty. Operand 1324 states and 4583 transitions. [2021-06-05 04:51:00,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:51:00,855 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:00,855 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:51:01,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5464 [2021-06-05 04:51:01,055 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:01,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:01,055 INFO L82 PathProgramCache]: Analyzing trace with hash 359706776, now seen corresponding path program 254 times [2021-06-05 04:51:01,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:01,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793715691] [2021-06-05 04:51:01,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:01,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:01,217 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:51:01,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:01,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793715691] [2021-06-05 04:51:01,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793715691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:01,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63208021] [2021-06-05 04:51:01,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:01,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:51:01,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:01,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:51:01,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:01,583 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:51:01,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63208021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:01,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:01,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 04:51:01,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884658595] [2021-06-05 04:51:01,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:51:01,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:01,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:51:01,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:51:01,584 INFO L87 Difference]: Start difference. First operand 1324 states and 4583 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:05,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:05,251 INFO L93 Difference]: Finished difference Result 2176 states and 7003 transitions. [2021-06-05 04:51:05,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-05 04:51:05,252 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:51:05,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:05,254 INFO L225 Difference]: With dead ends: 2176 [2021-06-05 04:51:05,254 INFO L226 Difference]: Without dead ends: 2029 [2021-06-05 04:51:05,255 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1959 ImplicationChecksByTransitivity, 3095.1ms TimeCoverageRelationStatistics Valid=597, Invalid=5723, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 04:51:05,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2029 states. [2021-06-05 04:51:05,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2029 to 1362. [2021-06-05 04:51:05,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1362 states, 1361 states have (on average 3.476855253490081) internal successors, (4732), 1361 states have internal predecessors, (4732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:05,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1362 states to 1362 states and 4732 transitions. [2021-06-05 04:51:05,271 INFO L78 Accepts]: Start accepts. Automaton has 1362 states and 4732 transitions. Word has length 23 [2021-06-05 04:51:05,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:05,271 INFO L482 AbstractCegarLoop]: Abstraction has 1362 states and 4732 transitions. [2021-06-05 04:51:05,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:05,271 INFO L276 IsEmpty]: Start isEmpty. Operand 1362 states and 4732 transitions. [2021-06-05 04:51:05,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:51:05,273 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:05,273 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:51:05,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5476,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:05,473 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:05,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:05,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1320997318, now seen corresponding path program 255 times [2021-06-05 04:51:05,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:05,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089147893] [2021-06-05 04:51:05,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:05,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:05,571 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:51:05,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:05,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089147893] [2021-06-05 04:51:05,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089147893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:05,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008919915] [2021-06-05 04:51:05,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:05,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:51:05,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:05,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:51:05,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:05,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:51:05,771 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:05,835 INFO L628 ElimStorePlain]: treesize reduction 28, result has 73.1 percent of original size [2021-06-05 04:51:05,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:05,839 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:05,897 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.6 percent of original size [2021-06-05 04:51:05,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:51:05,900 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:05,966 INFO L628 ElimStorePlain]: treesize reduction 3, result has 95.6 percent of original size [2021-06-05 04:51:05,969 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 04:51:05,969 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:107, output treesize:57 [2021-06-05 04:51:06,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:06,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:06,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:51:06,199 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:06,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:06,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:06,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:51:06,203 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:06,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:06,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:06,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:51:06,207 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:06,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:06,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:51:06,210 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:06,263 INFO L628 ElimStorePlain]: treesize reduction 26, result has 68.7 percent of original size [2021-06-05 04:51:06,264 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:51:06,264 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:151, output treesize:41 [2021-06-05 04:51:06,342 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:51:06,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008919915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:06,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:06,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 04:51:06,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107762645] [2021-06-05 04:51:06,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:51:06,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:06,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:51:06,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:51:06,343 INFO L87 Difference]: Start difference. First operand 1362 states and 4732 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:06,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:06,769 INFO L93 Difference]: Finished difference Result 1860 states and 6275 transitions. [2021-06-05 04:51:06,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:51:06,769 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:51:06,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:06,772 INFO L225 Difference]: With dead ends: 1860 [2021-06-05 04:51:06,772 INFO L226 Difference]: Without dead ends: 1806 [2021-06-05 04:51:06,772 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 528.5ms TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:51:06,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1806 states. [2021-06-05 04:51:06,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1806 to 1380. [2021-06-05 04:51:06,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1379 states have (on average 3.4851341551849164) internal successors, (4806), 1379 states have internal predecessors, (4806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:06,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 4806 transitions. [2021-06-05 04:51:06,789 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 4806 transitions. Word has length 23 [2021-06-05 04:51:06,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:06,789 INFO L482 AbstractCegarLoop]: Abstraction has 1380 states and 4806 transitions. [2021-06-05 04:51:06,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:06,790 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 4806 transitions. [2021-06-05 04:51:06,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:51:06,791 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:06,791 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:51:06,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5492 [2021-06-05 04:51:06,997 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:06,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:06,997 INFO L82 PathProgramCache]: Analyzing trace with hash 148239946, now seen corresponding path program 256 times [2021-06-05 04:51:06,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:06,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641593361] [2021-06-05 04:51:06,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:07,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:07,219 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:07,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:07,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641593361] [2021-06-05 04:51:07,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641593361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:07,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838652384] [2021-06-05 04:51:07,219 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:07,322 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:51:07,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:07,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:51:07,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:07,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:07,432 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:07,434 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:51:07,435 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:07,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:07,438 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:07,488 INFO L628 ElimStorePlain]: treesize reduction 30, result has 67.0 percent of original size [2021-06-05 04:51:07,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:51:07,491 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:07,524 INFO L628 ElimStorePlain]: treesize reduction 20, result has 65.5 percent of original size [2021-06-05 04:51:07,526 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-05 04:51:07,526 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:127, output treesize:33 [2021-06-05 04:51:07,961 INFO L446 ElimStorePlain]: Different costs {0=[ends_with_10, v_prenex_194], 1=[ends_with_2]} [2021-06-05 04:51:07,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:51:07,966 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:07,970 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:51:07,971 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:08,132 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2021-06-05 04:51:08,133 INFO L628 ElimStorePlain]: treesize reduction 49, result has 78.1 percent of original size [2021-06-05 04:51:08,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:51:08,137 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:08,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:08,140 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:08,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:51:08,144 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:08,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:08,148 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:08,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:08,151 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:08,266 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-06-05 04:51:08,267 INFO L628 ElimStorePlain]: treesize reduction 26, result has 83.4 percent of original size [2021-06-05 04:51:08,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:51:08,270 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:08,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:08,274 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:08,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:08,278 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:08,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:08,281 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:08,358 INFO L628 ElimStorePlain]: treesize reduction 25, result has 78.4 percent of original size [2021-06-05 04:51:08,360 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 3 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:51:08,360 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:261, output treesize:57 [2021-06-05 04:51:08,472 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:51:08,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838652384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:08,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:08,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2021-06-05 04:51:08,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996562496] [2021-06-05 04:51:08,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:51:08,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:08,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:51:08,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:51:08,473 INFO L87 Difference]: Start difference. First operand 1380 states and 4806 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:10,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:10,219 INFO L93 Difference]: Finished difference Result 1752 states and 5922 transitions. [2021-06-05 04:51:10,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:51:10,219 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:51:10,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:10,221 INFO L225 Difference]: With dead ends: 1752 [2021-06-05 04:51:10,221 INFO L226 Difference]: Without dead ends: 1650 [2021-06-05 04:51:10,221 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 1625.5ms TimeCoverageRelationStatistics Valid=235, Invalid=1325, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 04:51:10,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1650 states. [2021-06-05 04:51:10,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1650 to 1350. [2021-06-05 04:51:10,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1350 states, 1349 states have (on average 3.467753891771683) internal successors, (4678), 1349 states have internal predecessors, (4678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:10,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1350 states to 1350 states and 4678 transitions. [2021-06-05 04:51:10,235 INFO L78 Accepts]: Start accepts. Automaton has 1350 states and 4678 transitions. Word has length 23 [2021-06-05 04:51:10,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:10,236 INFO L482 AbstractCegarLoop]: Abstraction has 1350 states and 4678 transitions. [2021-06-05 04:51:10,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:10,236 INFO L276 IsEmpty]: Start isEmpty. Operand 1350 states and 4678 transitions. [2021-06-05 04:51:10,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:51:10,237 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:10,237 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:51:10,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5537,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:10,438 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:10,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:10,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1096509210, now seen corresponding path program 257 times [2021-06-05 04:51:10,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:10,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293242620] [2021-06-05 04:51:10,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:10,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:10,598 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:10,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:10,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293242620] [2021-06-05 04:51:10,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293242620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:10,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073772756] [2021-06-05 04:51:10,599 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:10,701 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:51:10,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:10,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:51:10,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:10,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:51:10,789 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:10,863 INFO L628 ElimStorePlain]: treesize reduction 48, result has 64.7 percent of original size [2021-06-05 04:51:10,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:10,866 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:10,899 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:51:10,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:10,903 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:10,953 INFO L628 ElimStorePlain]: treesize reduction 19, result has 76.3 percent of original size [2021-06-05 04:51:10,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:51:10,956 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:10,980 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:51:10,980 INFO L518 ElimStorePlain]: Eliminatee v_prenex_196 vanished before elimination [2021-06-05 04:51:10,981 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:51:10,981 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:139, output treesize:58 [2021-06-05 04:51:11,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:51:11,166 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:11,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:51:11,170 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:11,289 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2021-06-05 04:51:11,289 INFO L628 ElimStorePlain]: treesize reduction 169, result has 46.3 percent of original size [2021-06-05 04:51:11,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:11,293 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:11,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:11,296 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:11,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:11,300 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:11,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:51:11,303 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:11,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:11,307 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:11,396 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.2 percent of original size [2021-06-05 04:51:11,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:11,399 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:11,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:11,403 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:11,454 INFO L628 ElimStorePlain]: treesize reduction 51, result has 56.8 percent of original size [2021-06-05 04:51:11,455 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:51:11,455 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 4 variables, input treesize:321, output treesize:55 [2021-06-05 04:51:11,563 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:51:11,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073772756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:11,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:11,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2021-06-05 04:51:11,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596514775] [2021-06-05 04:51:11,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:51:11,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:11,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:51:11,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:51:11,564 INFO L87 Difference]: Start difference. First operand 1350 states and 4678 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:12,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:12,805 INFO L93 Difference]: Finished difference Result 1969 states and 6573 transitions. [2021-06-05 04:51:12,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 04:51:12,805 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:51:12,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:12,808 INFO L225 Difference]: With dead ends: 1969 [2021-06-05 04:51:12,808 INFO L226 Difference]: Without dead ends: 1918 [2021-06-05 04:51:12,808 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 1128.8ms TimeCoverageRelationStatistics Valid=187, Invalid=1219, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 04:51:12,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1918 states. [2021-06-05 04:51:12,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1918 to 1339. [2021-06-05 04:51:12,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1339 states, 1338 states have (on average 3.4715994020926755) internal successors, (4645), 1338 states have internal predecessors, (4645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:12,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1339 states to 1339 states and 4645 transitions. [2021-06-05 04:51:12,825 INFO L78 Accepts]: Start accepts. Automaton has 1339 states and 4645 transitions. Word has length 23 [2021-06-05 04:51:12,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:12,825 INFO L482 AbstractCegarLoop]: Abstraction has 1339 states and 4645 transitions. [2021-06-05 04:51:12,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:12,825 INFO L276 IsEmpty]: Start isEmpty. Operand 1339 states and 4645 transitions. [2021-06-05 04:51:12,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:51:12,826 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:12,826 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:51:13,026 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5640 [2021-06-05 04:51:13,027 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:13,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:13,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1328644520, now seen corresponding path program 258 times [2021-06-05 04:51:13,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:13,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674818645] [2021-06-05 04:51:13,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:13,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:13,197 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:13,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:13,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674818645] [2021-06-05 04:51:13,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674818645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:13,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519431474] [2021-06-05 04:51:13,197 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:13,301 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:51:13,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:13,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:51:13,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:13,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:51:13,379 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:13,451 INFO L628 ElimStorePlain]: treesize reduction 6, result has 94.3 percent of original size [2021-06-05 04:51:13,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:51:13,454 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:13,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:51:13,458 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:13,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:51:13,461 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:13,531 INFO L628 ElimStorePlain]: treesize reduction 21, result has 74.7 percent of original size [2021-06-05 04:51:13,532 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:51:13,533 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:111, output treesize:62 [2021-06-05 04:51:13,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:51:13,735 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:13,738 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:51:13,738 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:13,813 INFO L628 ElimStorePlain]: treesize reduction 92, result has 47.1 percent of original size [2021-06-05 04:51:13,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:13,817 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:13,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:13,821 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:13,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:51:13,825 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:13,853 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:51:13,853 INFO L518 ElimStorePlain]: Eliminatee v_prenex_202 vanished before elimination [2021-06-05 04:51:13,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:13,857 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:13,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:51:13,860 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:13,908 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.4 percent of original size [2021-06-05 04:51:13,910 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:51:13,910 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 5 variables, input treesize:204, output treesize:51 [2021-06-05 04:51:13,996 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:51:13,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519431474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:13,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:13,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2021-06-05 04:51:13,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15563987] [2021-06-05 04:51:13,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:51:13,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:13,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:51:13,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:51:13,997 INFO L87 Difference]: Start difference. First operand 1339 states and 4645 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:15,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:15,202 INFO L93 Difference]: Finished difference Result 1855 states and 6186 transitions. [2021-06-05 04:51:15,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 04:51:15,203 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:51:15,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:15,205 INFO L225 Difference]: With dead ends: 1855 [2021-06-05 04:51:15,205 INFO L226 Difference]: Without dead ends: 1804 [2021-06-05 04:51:15,206 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 1103.8ms TimeCoverageRelationStatistics Valid=192, Invalid=1368, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 04:51:15,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1804 states. [2021-06-05 04:51:15,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1804 to 1356. [2021-06-05 04:51:15,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1356 states, 1355 states have (on average 3.482656826568266) internal successors, (4719), 1355 states have internal predecessors, (4719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:15,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1356 states to 1356 states and 4719 transitions. [2021-06-05 04:51:15,222 INFO L78 Accepts]: Start accepts. Automaton has 1356 states and 4719 transitions. Word has length 23 [2021-06-05 04:51:15,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:15,222 INFO L482 AbstractCegarLoop]: Abstraction has 1356 states and 4719 transitions. [2021-06-05 04:51:15,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:15,222 INFO L276 IsEmpty]: Start isEmpty. Operand 1356 states and 4719 transitions. [2021-06-05 04:51:15,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:51:15,224 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:15,224 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:51:15,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5683,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:15,424 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:15,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:15,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1065013066, now seen corresponding path program 259 times [2021-06-05 04:51:15,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:15,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604010764] [2021-06-05 04:51:15,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:15,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:15,563 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:51:15,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:15,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604010764] [2021-06-05 04:51:15,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604010764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:15,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099569994] [2021-06-05 04:51:15,563 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:15,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:15,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:51:15,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:15,927 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:51:15,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099569994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:15,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:15,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 04:51:15,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510053462] [2021-06-05 04:51:15,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:51:15,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:15,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:51:15,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:51:15,928 INFO L87 Difference]: Start difference. First operand 1356 states and 4719 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:19,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:19,930 INFO L93 Difference]: Finished difference Result 2432 states and 7719 transitions. [2021-06-05 04:51:19,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 04:51:19,930 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:51:19,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:19,933 INFO L225 Difference]: With dead ends: 2432 [2021-06-05 04:51:19,933 INFO L226 Difference]: Without dead ends: 2270 [2021-06-05 04:51:19,933 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1759 ImplicationChecksByTransitivity, 3368.5ms TimeCoverageRelationStatistics Valid=606, Invalid=5556, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 04:51:19,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2270 states. [2021-06-05 04:51:19,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2270 to 1375. [2021-06-05 04:51:19,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1375 states, 1374 states have (on average 3.4963609898107713) internal successors, (4804), 1374 states have internal predecessors, (4804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:19,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1375 states to 1375 states and 4804 transitions. [2021-06-05 04:51:19,952 INFO L78 Accepts]: Start accepts. Automaton has 1375 states and 4804 transitions. Word has length 23 [2021-06-05 04:51:19,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:19,952 INFO L482 AbstractCegarLoop]: Abstraction has 1375 states and 4804 transitions. [2021-06-05 04:51:19,952 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:19,953 INFO L276 IsEmpty]: Start isEmpty. Operand 1375 states and 4804 transitions. [2021-06-05 04:51:19,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:51:19,954 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:19,954 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:51:20,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5721,261 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:20,155 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:20,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:20,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1756904426, now seen corresponding path program 260 times [2021-06-05 04:51:20,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:20,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423478342] [2021-06-05 04:51:20,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:20,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:20,390 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:20,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:20,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423478342] [2021-06-05 04:51:20,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423478342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:20,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708665702] [2021-06-05 04:51:20,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:20,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:51:20,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:20,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:51:20,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:20,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:20,624 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:20,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:51:20,627 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:20,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:20,630 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:20,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:20,634 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:20,696 INFO L628 ElimStorePlain]: treesize reduction 52, result has 57.4 percent of original size [2021-06-05 04:51:20,697 INFO L518 ElimStorePlain]: Eliminatee ends_with_10 vanished before elimination [2021-06-05 04:51:20,699 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 3 xjuncts. [2021-06-05 04:51:20,699 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:137, output treesize:70 [2021-06-05 04:51:20,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:21,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:21,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:51:21,001 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:21,004 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:51:21,004 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:21,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:21,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:21,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:51:21,009 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:21,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:21,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:51:21,012 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:21,073 INFO L628 ElimStorePlain]: treesize reduction 62, result has 50.4 percent of original size [2021-06-05 04:51:21,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:21,077 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:21,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:21,080 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:21,104 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:51:21,105 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:51:21,105 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:207, output treesize:33 [2021-06-05 04:51:21,177 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:51:21,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708665702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:21,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:21,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-06-05 04:51:21,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635614115] [2021-06-05 04:51:21,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:51:21,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:21,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:51:21,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:51:21,178 INFO L87 Difference]: Start difference. First operand 1375 states and 4804 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:22,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:22,949 INFO L93 Difference]: Finished difference Result 1790 states and 5946 transitions. [2021-06-05 04:51:22,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 04:51:22,950 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:51:22,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:22,952 INFO L225 Difference]: With dead ends: 1790 [2021-06-05 04:51:22,952 INFO L226 Difference]: Without dead ends: 1730 [2021-06-05 04:51:22,952 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 1381.4ms TimeCoverageRelationStatistics Valid=169, Invalid=1391, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 04:51:22,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1730 states. [2021-06-05 04:51:22,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1730 to 1351. [2021-06-05 04:51:22,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1351 states, 1350 states have (on average 3.4955555555555557) internal successors, (4719), 1350 states have internal predecessors, (4719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:22,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1351 states to 1351 states and 4719 transitions. [2021-06-05 04:51:22,968 INFO L78 Accepts]: Start accepts. Automaton has 1351 states and 4719 transitions. Word has length 23 [2021-06-05 04:51:22,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:22,968 INFO L482 AbstractCegarLoop]: Abstraction has 1351 states and 4719 transitions. [2021-06-05 04:51:22,968 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:22,968 INFO L276 IsEmpty]: Start isEmpty. Operand 1351 states and 4719 transitions. [2021-06-05 04:51:22,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:51:22,970 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:22,970 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:51:23,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5736,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:23,170 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:23,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:23,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1028994524, now seen corresponding path program 261 times [2021-06-05 04:51:23,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:23,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327941800] [2021-06-05 04:51:23,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:23,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:23,387 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:23,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:23,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327941800] [2021-06-05 04:51:23,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327941800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:23,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795949562] [2021-06-05 04:51:23,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:23,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:51:23,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:23,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:51:23,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:23,762 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:51:23,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795949562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:23,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:23,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-06-05 04:51:23,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939930889] [2021-06-05 04:51:23,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:51:23,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:23,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:51:23,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:51:23,763 INFO L87 Difference]: Start difference. First operand 1351 states and 4719 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:25,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:25,626 INFO L93 Difference]: Finished difference Result 1756 states and 5813 transitions. [2021-06-05 04:51:25,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 04:51:25,626 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:51:25,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:25,628 INFO L225 Difference]: With dead ends: 1756 [2021-06-05 04:51:25,629 INFO L226 Difference]: Without dead ends: 1680 [2021-06-05 04:51:25,629 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 1416.7ms TimeCoverageRelationStatistics Valid=208, Invalid=1862, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 04:51:25,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1680 states. [2021-06-05 04:51:25,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1680 to 1318. [2021-06-05 04:51:25,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1318 states, 1317 states have (on average 3.4738041002277904) internal successors, (4575), 1317 states have internal predecessors, (4575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:25,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1318 states to 1318 states and 4575 transitions. [2021-06-05 04:51:25,643 INFO L78 Accepts]: Start accepts. Automaton has 1318 states and 4575 transitions. Word has length 23 [2021-06-05 04:51:25,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:25,643 INFO L482 AbstractCegarLoop]: Abstraction has 1318 states and 4575 transitions. [2021-06-05 04:51:25,643 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:25,643 INFO L276 IsEmpty]: Start isEmpty. Operand 1318 states and 4575 transitions. [2021-06-05 04:51:25,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:51:25,645 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:25,645 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:51:25,845 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5818 [2021-06-05 04:51:25,845 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:25,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:25,846 INFO L82 PathProgramCache]: Analyzing trace with hash -1103912864, now seen corresponding path program 262 times [2021-06-05 04:51:25,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:25,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903746891] [2021-06-05 04:51:25,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:25,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:26,114 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:26,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:26,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903746891] [2021-06-05 04:51:26,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903746891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:26,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798204819] [2021-06-05 04:51:26,114 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:26,217 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:51:26,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:26,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:51:26,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:26,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:26,314 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:26,407 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.0 percent of original size [2021-06-05 04:51:26,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:51:26,410 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:26,469 INFO L628 ElimStorePlain]: treesize reduction 28, result has 71.7 percent of original size [2021-06-05 04:51:26,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:51:26,472 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:26,526 INFO L628 ElimStorePlain]: treesize reduction 3, result has 95.6 percent of original size [2021-06-05 04:51:26,528 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 04:51:26,528 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:107, output treesize:57 [2021-06-05 04:51:26,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:26,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:26,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:51:26,828 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:26,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:26,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:26,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:51:26,835 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:26,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:26,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:26,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:51:26,841 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:26,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:26,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:51:26,846 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:26,977 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2021-06-05 04:51:26,977 INFO L628 ElimStorePlain]: treesize reduction 99, result has 55.6 percent of original size [2021-06-05 04:51:26,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:26,981 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:26,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:26,985 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:27,038 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:51:27,040 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 04:51:27,040 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:301, output treesize:80 [2021-06-05 04:51:27,211 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:51:27,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798204819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:27,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:27,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-06-05 04:51:27,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539161125] [2021-06-05 04:51:27,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:51:27,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:27,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:51:27,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:51:27,211 INFO L87 Difference]: Start difference. First operand 1318 states and 4575 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:28,054 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2021-06-05 04:51:28,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:28,181 INFO L93 Difference]: Finished difference Result 1728 states and 5785 transitions. [2021-06-05 04:51:28,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:51:28,182 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:51:28,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:28,184 INFO L225 Difference]: With dead ends: 1728 [2021-06-05 04:51:28,184 INFO L226 Difference]: Without dead ends: 1674 [2021-06-05 04:51:28,184 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 1220.9ms TimeCoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:51:28,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1674 states. [2021-06-05 04:51:28,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1674 to 1307. [2021-06-05 04:51:28,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1307 states, 1306 states have (on average 3.4640122511485454) internal successors, (4524), 1306 states have internal predecessors, (4524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:28,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1307 states to 1307 states and 4524 transitions. [2021-06-05 04:51:28,198 INFO L78 Accepts]: Start accepts. Automaton has 1307 states and 4524 transitions. Word has length 23 [2021-06-05 04:51:28,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:28,198 INFO L482 AbstractCegarLoop]: Abstraction has 1307 states and 4524 transitions. [2021-06-05 04:51:28,198 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:28,198 INFO L276 IsEmpty]: Start isEmpty. Operand 1307 states and 4524 transitions. [2021-06-05 04:51:28,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:51:28,200 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:28,200 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:51:28,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5836 [2021-06-05 04:51:28,400 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:28,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:28,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1968196404, now seen corresponding path program 263 times [2021-06-05 04:51:28,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:28,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207711597] [2021-06-05 04:51:28,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:28,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:28,599 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:28,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:28,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207711597] [2021-06-05 04:51:28,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207711597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:28,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961579905] [2021-06-05 04:51:28,599 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:28,703 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:51:28,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:28,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:51:28,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:28,910 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:51:28,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961579905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:28,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:28,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2021-06-05 04:51:28,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603273200] [2021-06-05 04:51:28,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:51:28,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:28,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:51:28,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:51:28,911 INFO L87 Difference]: Start difference. First operand 1307 states and 4524 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:30,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:30,513 INFO L93 Difference]: Finished difference Result 1893 states and 6259 transitions. [2021-06-05 04:51:30,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 04:51:30,514 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:51:30,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:30,516 INFO L225 Difference]: With dead ends: 1893 [2021-06-05 04:51:30,516 INFO L226 Difference]: Without dead ends: 1784 [2021-06-05 04:51:30,516 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 1228.9ms TimeCoverageRelationStatistics Valid=275, Invalid=2275, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 04:51:30,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1784 states. [2021-06-05 04:51:30,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1784 to 1302. [2021-06-05 04:51:30,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1302 states, 1301 states have (on average 3.458877786318217) internal successors, (4500), 1301 states have internal predecessors, (4500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:30,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1302 states to 1302 states and 4500 transitions. [2021-06-05 04:51:30,531 INFO L78 Accepts]: Start accepts. Automaton has 1302 states and 4500 transitions. Word has length 23 [2021-06-05 04:51:30,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:30,531 INFO L482 AbstractCegarLoop]: Abstraction has 1302 states and 4500 transitions. [2021-06-05 04:51:30,531 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:30,531 INFO L276 IsEmpty]: Start isEmpty. Operand 1302 states and 4500 transitions. [2021-06-05 04:51:30,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:51:30,533 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:30,533 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:51:30,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5893 [2021-06-05 04:51:30,733 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:30,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:30,733 INFO L82 PathProgramCache]: Analyzing trace with hash 109506426, now seen corresponding path program 264 times [2021-06-05 04:51:30,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:30,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548192461] [2021-06-05 04:51:30,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:30,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:30,860 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:51:30,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:30,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548192461] [2021-06-05 04:51:30,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548192461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:30,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573471580] [2021-06-05 04:51:30,860 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:31,005 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:51:31,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:31,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:51:31,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:31,286 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:51:31,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573471580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:31,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:31,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 04:51:31,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723337167] [2021-06-05 04:51:31,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:51:31,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:31,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:51:31,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:51:31,287 INFO L87 Difference]: Start difference. First operand 1302 states and 4500 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:34,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:34,571 INFO L93 Difference]: Finished difference Result 2376 states and 7653 transitions. [2021-06-05 04:51:34,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 04:51:34,572 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:51:34,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:34,575 INFO L225 Difference]: With dead ends: 2376 [2021-06-05 04:51:34,575 INFO L226 Difference]: Without dead ends: 2187 [2021-06-05 04:51:34,575 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1420 ImplicationChecksByTransitivity, 2743.2ms TimeCoverageRelationStatistics Valid=536, Invalid=4434, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 04:51:34,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2187 states. [2021-06-05 04:51:34,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2187 to 1345. [2021-06-05 04:51:34,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1345 states, 1344 states have (on average 3.486607142857143) internal successors, (4686), 1344 states have internal predecessors, (4686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:34,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1345 states to 1345 states and 4686 transitions. [2021-06-05 04:51:34,592 INFO L78 Accepts]: Start accepts. Automaton has 1345 states and 4686 transitions. Word has length 23 [2021-06-05 04:51:34,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:34,592 INFO L482 AbstractCegarLoop]: Abstraction has 1345 states and 4686 transitions. [2021-06-05 04:51:34,592 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:34,592 INFO L276 IsEmpty]: Start isEmpty. Operand 1345 states and 4686 transitions. [2021-06-05 04:51:34,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:51:34,594 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:34,594 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:51:34,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5911 [2021-06-05 04:51:34,794 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:34,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:34,795 INFO L82 PathProgramCache]: Analyzing trace with hash 2135427910, now seen corresponding path program 265 times [2021-06-05 04:51:34,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:34,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421102484] [2021-06-05 04:51:34,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:34,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:34,901 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:51:34,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:34,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421102484] [2021-06-05 04:51:34,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421102484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:34,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102897984] [2021-06-05 04:51:34,901 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:35,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:35,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:51:35,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:35,221 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:51:35,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102897984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:35,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:35,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 04:51:35,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480974518] [2021-06-05 04:51:35,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:51:35,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:35,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:51:35,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:51:35,222 INFO L87 Difference]: Start difference. First operand 1345 states and 4686 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:37,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:37,597 INFO L93 Difference]: Finished difference Result 2059 states and 6741 transitions. [2021-06-05 04:51:37,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 04:51:37,598 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:51:37,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:37,600 INFO L225 Difference]: With dead ends: 2059 [2021-06-05 04:51:37,600 INFO L226 Difference]: Without dead ends: 1899 [2021-06-05 04:51:37,601 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 898 ImplicationChecksByTransitivity, 1878.7ms TimeCoverageRelationStatistics Valid=410, Invalid=3130, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 04:51:37,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1899 states. [2021-06-05 04:51:37,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1899 to 1275. [2021-06-05 04:51:37,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1275 states, 1274 states have (on average 3.4505494505494507) internal successors, (4396), 1274 states have internal predecessors, (4396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:37,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1275 states to 1275 states and 4396 transitions. [2021-06-05 04:51:37,615 INFO L78 Accepts]: Start accepts. Automaton has 1275 states and 4396 transitions. Word has length 23 [2021-06-05 04:51:37,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:37,615 INFO L482 AbstractCegarLoop]: Abstraction has 1275 states and 4396 transitions. [2021-06-05 04:51:37,615 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:37,615 INFO L276 IsEmpty]: Start isEmpty. Operand 1275 states and 4396 transitions. [2021-06-05 04:51:37,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:51:37,617 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:37,617 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:51:37,817 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5930,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:37,817 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:37,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:37,818 INFO L82 PathProgramCache]: Analyzing trace with hash -2009463328, now seen corresponding path program 266 times [2021-06-05 04:51:37,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:37,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120219725] [2021-06-05 04:51:37,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:37,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:38,092 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:38,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:38,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120219725] [2021-06-05 04:51:38,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120219725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:38,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445685058] [2021-06-05 04:51:38,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:38,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:51:38,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:38,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:51:38,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:38,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:51:38,329 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:38,415 INFO L628 ElimStorePlain]: treesize reduction 34, result has 74.6 percent of original size [2021-06-05 04:51:38,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:38,418 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:38,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:38,421 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:38,480 INFO L628 ElimStorePlain]: treesize reduction 22, result has 76.1 percent of original size [2021-06-05 04:51:38,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:51:38,483 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:38,511 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:51:38,513 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 04:51:38,513 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:137, output treesize:62 [2021-06-05 04:51:38,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:38,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:38,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:51:38,730 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:38,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:38,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:38,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:51:38,733 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:38,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:38,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:38,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:51:38,737 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:38,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:38,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 04:51:38,741 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:38,784 INFO L628 ElimStorePlain]: treesize reduction 45, result has 46.4 percent of original size [2021-06-05 04:51:38,785 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:51:38,785 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:145, output treesize:33 [2021-06-05 04:51:38,858 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:51:38,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445685058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:38,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:38,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-06-05 04:51:38,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883019232] [2021-06-05 04:51:38,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:51:38,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:38,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:51:38,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=374, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:51:38,859 INFO L87 Difference]: Start difference. First operand 1275 states and 4396 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:41,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:41,471 INFO L93 Difference]: Finished difference Result 1896 states and 6139 transitions. [2021-06-05 04:51:41,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 04:51:41,472 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:51:41,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:41,474 INFO L225 Difference]: With dead ends: 1896 [2021-06-05 04:51:41,475 INFO L226 Difference]: Without dead ends: 1788 [2021-06-05 04:51:41,475 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 2157.0ms TimeCoverageRelationStatistics Valid=272, Invalid=1984, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 04:51:41,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1788 states. [2021-06-05 04:51:41,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1788 to 1253. [2021-06-05 04:51:41,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1253 states, 1252 states have (on average 3.4544728434504792) internal successors, (4325), 1252 states have internal predecessors, (4325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:41,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1253 states to 1253 states and 4325 transitions. [2021-06-05 04:51:41,490 INFO L78 Accepts]: Start accepts. Automaton has 1253 states and 4325 transitions. Word has length 23 [2021-06-05 04:51:41,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:41,490 INFO L482 AbstractCegarLoop]: Abstraction has 1253 states and 4325 transitions. [2021-06-05 04:51:41,490 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:41,490 INFO L276 IsEmpty]: Start isEmpty. Operand 1253 states and 4325 transitions. [2021-06-05 04:51:41,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:51:41,491 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:41,492 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:51:41,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5944,268 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:41,692 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:41,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:41,692 INFO L82 PathProgramCache]: Analyzing trace with hash 995054606, now seen corresponding path program 267 times [2021-06-05 04:51:41,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:41,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180323194] [2021-06-05 04:51:41,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:41,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:41,831 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:41,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:41,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180323194] [2021-06-05 04:51:41,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180323194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:41,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090772393] [2021-06-05 04:51:41,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:41,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:51:41,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:41,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:51:41,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:41,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:41,973 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:41,979 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:51:41,980 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-05 04:51:41,980 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:13 [2021-06-05 04:51:42,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:42,110 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:42,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:42,113 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:42,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:42,115 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:42,151 INFO L628 ElimStorePlain]: treesize reduction 23, result has 63.5 percent of original size [2021-06-05 04:51:42,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:42,154 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:42,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:51:42,157 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:42,183 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.0 percent of original size [2021-06-05 04:51:42,184 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:51:42,184 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:75, output treesize:19 [2021-06-05 04:51:42,222 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:51:42,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090772393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:42,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:42,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 18 [2021-06-05 04:51:42,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641460215] [2021-06-05 04:51:42,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:51:42,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:42,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:51:42,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:51:42,223 INFO L87 Difference]: Start difference. First operand 1253 states and 4325 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:43,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:43,559 INFO L93 Difference]: Finished difference Result 1836 states and 5986 transitions. [2021-06-05 04:51:43,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 04:51:43,559 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:51:43,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:43,562 INFO L225 Difference]: With dead ends: 1836 [2021-06-05 04:51:43,562 INFO L226 Difference]: Without dead ends: 1742 [2021-06-05 04:51:43,562 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 1108.6ms TimeCoverageRelationStatistics Valid=448, Invalid=2102, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 04:51:43,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1742 states. [2021-06-05 04:51:43,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1742 to 1236. [2021-06-05 04:51:43,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1236 states, 1235 states have (on average 3.473684210526316) internal successors, (4290), 1235 states have internal predecessors, (4290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:43,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1236 states to 1236 states and 4290 transitions. [2021-06-05 04:51:43,577 INFO L78 Accepts]: Start accepts. Automaton has 1236 states and 4290 transitions. Word has length 24 [2021-06-05 04:51:43,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:43,577 INFO L482 AbstractCegarLoop]: Abstraction has 1236 states and 4290 transitions. [2021-06-05 04:51:43,577 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:43,577 INFO L276 IsEmpty]: Start isEmpty. Operand 1236 states and 4290 transitions. [2021-06-05 04:51:43,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:51:43,578 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:43,578 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:51:43,779 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6002 [2021-06-05 04:51:43,779 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:43,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:43,779 INFO L82 PathProgramCache]: Analyzing trace with hash -402598, now seen corresponding path program 268 times [2021-06-05 04:51:43,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:43,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119228794] [2021-06-05 04:51:43,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:43,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:43,863 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:51:43,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:43,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119228794] [2021-06-05 04:51:43,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119228794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:43,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146240155] [2021-06-05 04:51:43,864 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:43,970 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:51:43,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:43,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:51:43,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:44,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:44,002 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:44,007 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:51:44,008 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-05 04:51:44,008 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:13 [2021-06-05 04:51:44,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:44,069 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:44,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:44,072 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:44,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:44,091 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:44,127 INFO L628 ElimStorePlain]: treesize reduction 23, result has 63.5 percent of original size [2021-06-05 04:51:44,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:44,130 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:44,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:51:44,132 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:44,158 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.0 percent of original size [2021-06-05 04:51:44,159 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:51:44,159 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:75, output treesize:19 [2021-06-05 04:51:44,194 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:51:44,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146240155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:44,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:44,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 14 [2021-06-05 04:51:44,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693417358] [2021-06-05 04:51:44,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:51:44,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:44,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:51:44,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:51:44,195 INFO L87 Difference]: Start difference. First operand 1236 states and 4290 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:44,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:44,551 INFO L93 Difference]: Finished difference Result 1658 states and 5527 transitions. [2021-06-05 04:51:44,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:51:44,551 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:51:44,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:44,553 INFO L225 Difference]: With dead ends: 1658 [2021-06-05 04:51:44,553 INFO L226 Difference]: Without dead ends: 1599 [2021-06-05 04:51:44,553 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 307.7ms TimeCoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:51:44,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1599 states. [2021-06-05 04:51:44,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1599 to 1258. [2021-06-05 04:51:44,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1258 states, 1257 states have (on average 3.484486873508353) internal successors, (4380), 1257 states have internal predecessors, (4380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:44,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1258 states to 1258 states and 4380 transitions. [2021-06-05 04:51:44,567 INFO L78 Accepts]: Start accepts. Automaton has 1258 states and 4380 transitions. Word has length 24 [2021-06-05 04:51:44,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:44,567 INFO L482 AbstractCegarLoop]: Abstraction has 1258 states and 4380 transitions. [2021-06-05 04:51:44,567 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:44,567 INFO L276 IsEmpty]: Start isEmpty. Operand 1258 states and 4380 transitions. [2021-06-05 04:51:44,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:51:44,568 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:44,568 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:51:44,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6010,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:44,769 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:44,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:44,769 INFO L82 PathProgramCache]: Analyzing trace with hash 2080068998, now seen corresponding path program 269 times [2021-06-05 04:51:44,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:44,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224653339] [2021-06-05 04:51:44,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:44,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:44,849 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:51:44,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:44,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224653339] [2021-06-05 04:51:44,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224653339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:44,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531350683] [2021-06-05 04:51:44,850 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:44,955 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:51:44,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:44,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:51:44,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:44,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:44,985 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:44,990 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:51:44,991 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-05 04:51:44,991 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:13 [2021-06-05 04:51:45,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:45,060 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:45,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:45,063 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:45,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:45,066 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:45,102 INFO L628 ElimStorePlain]: treesize reduction 23, result has 63.5 percent of original size [2021-06-05 04:51:45,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:45,105 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:45,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:51:45,108 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:45,134 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.0 percent of original size [2021-06-05 04:51:45,135 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:51:45,135 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:75, output treesize:19 [2021-06-05 04:51:45,179 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:51:45,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531350683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:45,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:45,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2021-06-05 04:51:45,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387637844] [2021-06-05 04:51:45,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:51:45,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:45,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:51:45,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:51:45,180 INFO L87 Difference]: Start difference. First operand 1258 states and 4380 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:45,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:45,584 INFO L93 Difference]: Finished difference Result 1659 states and 5547 transitions. [2021-06-05 04:51:45,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:51:45,584 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:51:45,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:45,586 INFO L225 Difference]: With dead ends: 1659 [2021-06-05 04:51:45,586 INFO L226 Difference]: Without dead ends: 1600 [2021-06-05 04:51:45,586 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 301.2ms TimeCoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:51:45,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1600 states. [2021-06-05 04:51:45,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1600 to 1283. [2021-06-05 04:51:45,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1283 states, 1282 states have (on average 3.49609984399376) internal successors, (4482), 1282 states have internal predecessors, (4482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:45,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1283 states to 1283 states and 4482 transitions. [2021-06-05 04:51:45,600 INFO L78 Accepts]: Start accepts. Automaton has 1283 states and 4482 transitions. Word has length 24 [2021-06-05 04:51:45,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:45,600 INFO L482 AbstractCegarLoop]: Abstraction has 1283 states and 4482 transitions. [2021-06-05 04:51:45,600 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:45,600 INFO L276 IsEmpty]: Start isEmpty. Operand 1283 states and 4482 transitions. [2021-06-05 04:51:45,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:51:45,602 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:45,602 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:51:45,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6019,271 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:45,802 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:45,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:45,802 INFO L82 PathProgramCache]: Analyzing trace with hash -1039407654, now seen corresponding path program 270 times [2021-06-05 04:51:45,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:45,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633423446] [2021-06-05 04:51:45,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:45,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:45,960 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:45,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:45,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633423446] [2021-06-05 04:51:45,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633423446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:45,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477147656] [2021-06-05 04:51:45,960 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:46,066 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:51:46,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:46,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:51:46,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:46,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:46,090 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:46,095 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:51:46,096 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-05 04:51:46,096 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:13 [2021-06-05 04:51:46,343 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:51:46,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477147656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:46,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:46,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 19 [2021-06-05 04:51:46,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420279828] [2021-06-05 04:51:46,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:51:46,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:46,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:51:46,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:51:46,344 INFO L87 Difference]: Start difference. First operand 1283 states and 4482 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:48,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:48,696 INFO L93 Difference]: Finished difference Result 2239 states and 7277 transitions. [2021-06-05 04:51:48,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 04:51:48,697 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:51:48,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:48,700 INFO L225 Difference]: With dead ends: 2239 [2021-06-05 04:51:48,700 INFO L226 Difference]: Without dead ends: 2113 [2021-06-05 04:51:48,700 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 1929.9ms TimeCoverageRelationStatistics Valid=491, Invalid=2931, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 04:51:48,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2113 states. [2021-06-05 04:51:48,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2113 to 1282. [2021-06-05 04:51:48,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1282 states, 1281 states have (on average 3.501951600312256) internal successors, (4486), 1281 states have internal predecessors, (4486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:48,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1282 states to 1282 states and 4486 transitions. [2021-06-05 04:51:48,715 INFO L78 Accepts]: Start accepts. Automaton has 1282 states and 4486 transitions. Word has length 24 [2021-06-05 04:51:48,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:48,715 INFO L482 AbstractCegarLoop]: Abstraction has 1282 states and 4486 transitions. [2021-06-05 04:51:48,716 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:48,716 INFO L276 IsEmpty]: Start isEmpty. Operand 1282 states and 4486 transitions. [2021-06-05 04:51:48,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:51:48,717 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:48,717 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:51:48,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6027,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:48,917 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:48,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:48,918 INFO L82 PathProgramCache]: Analyzing trace with hash -794804850, now seen corresponding path program 271 times [2021-06-05 04:51:48,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:48,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338953944] [2021-06-05 04:51:48,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:48,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:49,037 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:49,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:49,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338953944] [2021-06-05 04:51:49,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338953944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:49,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271219926] [2021-06-05 04:51:49,038 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:49,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:49,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:51:49,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:49,172 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:51:49,172 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:49,194 INFO L628 ElimStorePlain]: treesize reduction 2, result has 93.3 percent of original size [2021-06-05 04:51:49,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:51:49,197 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:49,206 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:51:49,206 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:51:49,207 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:49, output treesize:22 [2021-06-05 04:51:49,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:49,258 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:49,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:49,261 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:49,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:49,264 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:49,300 INFO L628 ElimStorePlain]: treesize reduction 23, result has 63.5 percent of original size [2021-06-05 04:51:49,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:49,303 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:49,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:51:49,306 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:49,332 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.0 percent of original size [2021-06-05 04:51:49,333 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:51:49,333 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:75, output treesize:19 [2021-06-05 04:51:49,377 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:51:49,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271219926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:49,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:49,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-05 04:51:49,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961357561] [2021-06-05 04:51:49,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:51:49,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:49,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:51:49,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:51:49,378 INFO L87 Difference]: Start difference. First operand 1282 states and 4486 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:49,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:49,750 INFO L93 Difference]: Finished difference Result 1579 states and 5362 transitions. [2021-06-05 04:51:49,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:51:49,750 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:51:49,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:49,752 INFO L225 Difference]: With dead ends: 1579 [2021-06-05 04:51:49,752 INFO L226 Difference]: Without dead ends: 1528 [2021-06-05 04:51:49,752 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 373.3ms TimeCoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:51:49,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1528 states. [2021-06-05 04:51:49,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1528 to 1318. [2021-06-05 04:51:49,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1318 states, 1317 states have (on average 3.507972665148064) internal successors, (4620), 1317 states have internal predecessors, (4620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:49,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1318 states to 1318 states and 4620 transitions. [2021-06-05 04:51:49,766 INFO L78 Accepts]: Start accepts. Automaton has 1318 states and 4620 transitions. Word has length 24 [2021-06-05 04:51:49,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:49,766 INFO L482 AbstractCegarLoop]: Abstraction has 1318 states and 4620 transitions. [2021-06-05 04:51:49,766 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:49,766 INFO L276 IsEmpty]: Start isEmpty. Operand 1318 states and 4620 transitions. [2021-06-05 04:51:49,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:51:49,767 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:49,767 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:51:49,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6063 [2021-06-05 04:51:49,968 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:49,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:49,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1285666746, now seen corresponding path program 272 times [2021-06-05 04:51:49,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:49,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085858413] [2021-06-05 04:51:49,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:49,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:50,077 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:50,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:50,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085858413] [2021-06-05 04:51:50,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085858413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:50,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90638310] [2021-06-05 04:51:50,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:50,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:51:50,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:50,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:51:50,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:50,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:51:50,249 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:50,268 INFO L628 ElimStorePlain]: treesize reduction 2, result has 91.7 percent of original size [2021-06-05 04:51:50,269 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:51:50,269 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:22 [2021-06-05 04:51:50,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:50,347 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:50,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:50,350 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:50,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:50,353 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:50,389 INFO L628 ElimStorePlain]: treesize reduction 23, result has 63.5 percent of original size [2021-06-05 04:51:50,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:50,392 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:50,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:51:50,394 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:50,421 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.0 percent of original size [2021-06-05 04:51:50,422 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:51:50,422 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:75, output treesize:19 [2021-06-05 04:51:50,470 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:51:50,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90638310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:50,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:50,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 04:51:50,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111785240] [2021-06-05 04:51:50,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:51:50,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:50,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:51:50,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:51:50,470 INFO L87 Difference]: Start difference. First operand 1318 states and 4620 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:50,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:50,831 INFO L93 Difference]: Finished difference Result 1678 states and 5684 transitions. [2021-06-05 04:51:50,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:51:50,832 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:51:50,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:50,834 INFO L225 Difference]: With dead ends: 1678 [2021-06-05 04:51:50,834 INFO L226 Difference]: Without dead ends: 1627 [2021-06-05 04:51:50,834 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 353.0ms TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:51:50,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1627 states. [2021-06-05 04:51:50,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1627 to 1343. [2021-06-05 04:51:50,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1343 states, 1342 states have (on average 3.518628912071535) internal successors, (4722), 1342 states have internal predecessors, (4722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:50,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1343 states to 1343 states and 4722 transitions. [2021-06-05 04:51:50,848 INFO L78 Accepts]: Start accepts. Automaton has 1343 states and 4722 transitions. Word has length 24 [2021-06-05 04:51:50,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:50,848 INFO L482 AbstractCegarLoop]: Abstraction has 1343 states and 4722 transitions. [2021-06-05 04:51:50,848 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:50,848 INFO L276 IsEmpty]: Start isEmpty. Operand 1343 states and 4722 transitions. [2021-06-05 04:51:50,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:51:50,850 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:50,850 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:51:51,050 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 274 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6069 [2021-06-05 04:51:51,050 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:51,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:51,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1833809906, now seen corresponding path program 273 times [2021-06-05 04:51:51,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:51,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016760172] [2021-06-05 04:51:51,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:51,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:51,162 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:51,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:51,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016760172] [2021-06-05 04:51:51,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016760172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:51,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080230495] [2021-06-05 04:51:51,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:51,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:51:51,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:51,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:51:51,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:51,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:51:51,301 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:51,320 INFO L628 ElimStorePlain]: treesize reduction 2, result has 91.7 percent of original size [2021-06-05 04:51:51,321 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:51:51,321 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:22 [2021-06-05 04:51:51,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:51,495 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:51,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:51,499 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:51,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:51,502 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:51,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:51:51,505 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:51,507 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:51:51,508 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:51,510 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:51:51,511 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:51,513 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:51:51,514 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:51,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:51:51,517 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:51,584 INFO L628 ElimStorePlain]: treesize reduction 20, result has 80.4 percent of original size [2021-06-05 04:51:51,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:51,587 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:51,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:51:51,591 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:51,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:51,593 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:51,633 INFO L628 ElimStorePlain]: treesize reduction 21, result has 70.4 percent of original size [2021-06-05 04:51:51,633 INFO L518 ElimStorePlain]: Eliminatee v_prenex_215 vanished before elimination [2021-06-05 04:51:51,634 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:51:51,634 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:201, output treesize:34 [2021-06-05 04:51:51,708 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:51:51,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080230495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:51,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:51,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 04:51:51,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240354184] [2021-06-05 04:51:51,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:51:51,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:51,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:51:51,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:51:51,709 INFO L87 Difference]: Start difference. First operand 1343 states and 4722 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:52,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:52,100 INFO L93 Difference]: Finished difference Result 1761 states and 5948 transitions. [2021-06-05 04:51:52,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:51:52,101 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:51:52,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:52,103 INFO L225 Difference]: With dead ends: 1761 [2021-06-05 04:51:52,103 INFO L226 Difference]: Without dead ends: 1710 [2021-06-05 04:51:52,103 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 369.4ms TimeCoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:51:52,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1710 states. [2021-06-05 04:51:52,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1710 to 1371. [2021-06-05 04:51:52,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1371 states, 1370 states have (on average 3.55036496350365) internal successors, (4864), 1370 states have internal predecessors, (4864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:52,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1371 states to 1371 states and 4864 transitions. [2021-06-05 04:51:52,118 INFO L78 Accepts]: Start accepts. Automaton has 1371 states and 4864 transitions. Word has length 24 [2021-06-05 04:51:52,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:52,119 INFO L482 AbstractCegarLoop]: Abstraction has 1371 states and 4864 transitions. [2021-06-05 04:51:52,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:52,119 INFO L276 IsEmpty]: Start isEmpty. Operand 1371 states and 4864 transitions. [2021-06-05 04:51:52,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:51:52,120 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:52,120 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:51:52,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 275 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6079 [2021-06-05 04:51:52,321 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:52,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:52,321 INFO L82 PathProgramCache]: Analyzing trace with hash -220243172, now seen corresponding path program 274 times [2021-06-05 04:51:52,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:52,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282218115] [2021-06-05 04:51:52,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:52,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:52,424 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:52,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:52,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282218115] [2021-06-05 04:51:52,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282218115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:52,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326250836] [2021-06-05 04:51:52,425 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:52,542 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:51:52,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:52,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:51:52,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:52,572 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:51:52,573 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:52,595 INFO L628 ElimStorePlain]: treesize reduction 2, result has 93.3 percent of original size [2021-06-05 04:51:52,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:51:52,597 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:52,607 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:51:52,607 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:51:52,607 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:49, output treesize:22 [2021-06-05 04:51:52,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:51:52,761 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:52,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:52,764 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:52,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:51:52,768 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:52,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:52,771 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:52,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:52,775 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:52,777 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:51:52,778 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:52,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:52,781 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:52,784 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:51:52,784 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:52,858 INFO L628 ElimStorePlain]: treesize reduction 42, result has 66.4 percent of original size [2021-06-05 04:51:52,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:51:52,861 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:52,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:52,865 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:52,923 INFO L628 ElimStorePlain]: treesize reduction 3, result has 96.1 percent of original size [2021-06-05 04:51:52,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:51:52,926 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:52,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:51:52,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:52,956 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:52,995 INFO L628 ElimStorePlain]: treesize reduction 16, result has 75.8 percent of original size [2021-06-05 04:51:52,996 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:51:52,996 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:201, output treesize:34 [2021-06-05 04:51:53,069 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:51:53,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326250836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:53,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:53,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 04:51:53,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79805360] [2021-06-05 04:51:53,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:51:53,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:53,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:51:53,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:51:53,069 INFO L87 Difference]: Start difference. First operand 1371 states and 4864 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:53,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:53,555 INFO L93 Difference]: Finished difference Result 1701 states and 5782 transitions. [2021-06-05 04:51:53,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:51:53,555 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:51:53,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:53,558 INFO L225 Difference]: With dead ends: 1701 [2021-06-05 04:51:53,558 INFO L226 Difference]: Without dead ends: 1638 [2021-06-05 04:51:53,558 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 455.8ms TimeCoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:51:53,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1638 states. [2021-06-05 04:51:53,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1638 to 1296. [2021-06-05 04:51:53,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1296 states, 1295 states have (on average 3.498069498069498) internal successors, (4530), 1295 states have internal predecessors, (4530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:53,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1296 states to 1296 states and 4530 transitions. [2021-06-05 04:51:53,572 INFO L78 Accepts]: Start accepts. Automaton has 1296 states and 4530 transitions. Word has length 24 [2021-06-05 04:51:53,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:53,573 INFO L482 AbstractCegarLoop]: Abstraction has 1296 states and 4530 transitions. [2021-06-05 04:51:53,573 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:53,573 INFO L276 IsEmpty]: Start isEmpty. Operand 1296 states and 4530 transitions. [2021-06-05 04:51:53,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:51:53,575 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:53,575 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:51:53,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6124 [2021-06-05 04:51:53,793 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:53,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:53,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1355776782, now seen corresponding path program 275 times [2021-06-05 04:51:53,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:53,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928741344] [2021-06-05 04:51:53,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:53,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:53,903 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:53,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:53,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928741344] [2021-06-05 04:51:53,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928741344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:53,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171676530] [2021-06-05 04:51:53,903 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:54,011 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:51:54,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:54,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:51:54,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:54,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:54,057 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:54,078 INFO L628 ElimStorePlain]: treesize reduction 17, result has 54.1 percent of original size [2021-06-05 04:51:54,078 INFO L518 ElimStorePlain]: Eliminatee v_prenex_219 vanished before elimination [2021-06-05 04:51:54,078 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:51:54,078 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:20 [2021-06-05 04:51:54,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:54,130 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:54,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:54,133 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:54,135 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:51:54,135 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:54,153 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:51:54,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:54,155 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:54,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:51:54,158 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:54,184 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.0 percent of original size [2021-06-05 04:51:54,184 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:51:54,185 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:75, output treesize:19 [2021-06-05 04:51:54,222 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:51:54,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171676530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:54,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:54,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-05 04:51:54,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618478831] [2021-06-05 04:51:54,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:51:54,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:54,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:51:54,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:51:54,223 INFO L87 Difference]: Start difference. First operand 1296 states and 4530 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:54,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:54,607 INFO L93 Difference]: Finished difference Result 1571 states and 5344 transitions. [2021-06-05 04:51:54,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:51:54,607 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:51:54,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:54,609 INFO L225 Difference]: With dead ends: 1571 [2021-06-05 04:51:54,609 INFO L226 Difference]: Without dead ends: 1520 [2021-06-05 04:51:54,609 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 337.7ms TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:51:54,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2021-06-05 04:51:54,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 1335. [2021-06-05 04:51:54,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1335 states, 1334 states have (on average 3.505247376311844) internal successors, (4676), 1334 states have internal predecessors, (4676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:54,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1335 states to 1335 states and 4676 transitions. [2021-06-05 04:51:54,633 INFO L78 Accepts]: Start accepts. Automaton has 1335 states and 4676 transitions. Word has length 24 [2021-06-05 04:51:54,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:54,633 INFO L482 AbstractCegarLoop]: Abstraction has 1335 states and 4676 transitions. [2021-06-05 04:51:54,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:54,633 INFO L276 IsEmpty]: Start isEmpty. Operand 1335 states and 4676 transitions. [2021-06-05 04:51:54,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:51:54,634 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:54,634 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:51:54,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 277 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6168 [2021-06-05 04:51:54,835 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:54,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:54,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1763699870, now seen corresponding path program 276 times [2021-06-05 04:51:54,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:54,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737410563] [2021-06-05 04:51:54,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:54,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:54,946 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:54,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:54,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737410563] [2021-06-05 04:51:54,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737410563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:54,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436607302] [2021-06-05 04:51:54,947 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:55,053 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:51:55,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:55,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:51:55,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:55,096 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:51:55,097 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:55,119 INFO L628 ElimStorePlain]: treesize reduction 2, result has 92.3 percent of original size [2021-06-05 04:51:55,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:55,121 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:55,130 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:51:55,131 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:51:55,131 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:41, output treesize:20 [2021-06-05 04:51:55,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:51:55,246 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:55,328 INFO L628 ElimStorePlain]: treesize reduction 49, result has 65.7 percent of original size [2021-06-05 04:51:55,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:55,332 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:55,406 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.9 percent of original size [2021-06-05 04:51:55,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:55,409 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:55,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:51:55,413 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:55,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:51:55,416 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:55,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:55,419 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:55,476 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.3 percent of original size [2021-06-05 04:51:55,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:55,480 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:55,521 INFO L628 ElimStorePlain]: treesize reduction 16, result has 76.8 percent of original size [2021-06-05 04:51:55,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:51:55,524 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:55,543 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:51:55,544 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 5 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:51:55,544 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:146, output treesize:34 [2021-06-05 04:51:55,617 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:51:55,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436607302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:55,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:55,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 04:51:55,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690845150] [2021-06-05 04:51:55,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:51:55,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:55,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:51:55,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:51:55,618 INFO L87 Difference]: Start difference. First operand 1335 states and 4676 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:56,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:56,014 INFO L93 Difference]: Finished difference Result 1723 states and 5814 transitions. [2021-06-05 04:51:56,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:51:56,015 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:51:56,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:56,017 INFO L225 Difference]: With dead ends: 1723 [2021-06-05 04:51:56,017 INFO L226 Difference]: Without dead ends: 1672 [2021-06-05 04:51:56,017 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 368.1ms TimeCoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:51:56,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1672 states. [2021-06-05 04:51:56,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1672 to 1363. [2021-06-05 04:51:56,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1363 states, 1362 states have (on average 3.537444933920705) internal successors, (4818), 1362 states have internal predecessors, (4818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:56,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1363 states to 1363 states and 4818 transitions. [2021-06-05 04:51:56,032 INFO L78 Accepts]: Start accepts. Automaton has 1363 states and 4818 transitions. Word has length 24 [2021-06-05 04:51:56,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:56,032 INFO L482 AbstractCegarLoop]: Abstraction has 1363 states and 4818 transitions. [2021-06-05 04:51:56,032 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:56,032 INFO L276 IsEmpty]: Start isEmpty. Operand 1363 states and 4818 transitions. [2021-06-05 04:51:56,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:51:56,034 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:56,034 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:51:56,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6174 [2021-06-05 04:51:56,234 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:56,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:56,234 INFO L82 PathProgramCache]: Analyzing trace with hash -150133136, now seen corresponding path program 277 times [2021-06-05 04:51:56,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:56,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805470256] [2021-06-05 04:51:56,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:56,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:56,342 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:56,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:56,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805470256] [2021-06-05 04:51:56,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805470256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:56,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841689131] [2021-06-05 04:51:56,343 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:56,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:56,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:51:56,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:56,492 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:51:56,493 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:56,515 INFO L628 ElimStorePlain]: treesize reduction 2, result has 92.3 percent of original size [2021-06-05 04:51:56,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:56,517 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:56,527 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:51:56,527 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:51:56,527 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:41, output treesize:20 [2021-06-05 04:51:56,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:51:56,659 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:56,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:51:56,665 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:56,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:56,670 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:56,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:51:56,675 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:56,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:56,680 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:56,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:56,685 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:56,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:56,690 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:56,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:56,695 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:56,698 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:51:56,698 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:56,791 INFO L628 ElimStorePlain]: treesize reduction 64, result has 61.7 percent of original size [2021-06-05 04:51:56,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:56,795 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:56,859 INFO L628 ElimStorePlain]: treesize reduction 40, result has 59.6 percent of original size [2021-06-05 04:51:56,860 INFO L518 ElimStorePlain]: Eliminatee v_prenex_227 vanished before elimination [2021-06-05 04:51:56,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:51:56,863 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:56,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:51:56,866 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:56,904 INFO L628 ElimStorePlain]: treesize reduction 2, result has 96.2 percent of original size [2021-06-05 04:51:56,904 INFO L518 ElimStorePlain]: Eliminatee v_prenex_226 vanished before elimination [2021-06-05 04:51:56,905 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 5 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:51:56,905 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:224, output treesize:34 [2021-06-05 04:51:56,978 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:51:56,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841689131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:56,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:56,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 04:51:56,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542997628] [2021-06-05 04:51:56,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:51:56,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:56,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:51:56,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:51:56,979 INFO L87 Difference]: Start difference. First operand 1363 states and 4818 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:57,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:57,421 INFO L93 Difference]: Finished difference Result 1653 states and 5622 transitions. [2021-06-05 04:51:57,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:51:57,422 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:51:57,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:57,424 INFO L225 Difference]: With dead ends: 1653 [2021-06-05 04:51:57,424 INFO L226 Difference]: Without dead ends: 1590 [2021-06-05 04:51:57,424 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 403.8ms TimeCoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:51:57,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1590 states. [2021-06-05 04:51:57,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1590 to 1310. [2021-06-05 04:51:57,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1310 states, 1309 states have (on average 3.4935064935064934) internal successors, (4573), 1309 states have internal predecessors, (4573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:57,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1310 states to 1310 states and 4573 transitions. [2021-06-05 04:51:57,438 INFO L78 Accepts]: Start accepts. Automaton has 1310 states and 4573 transitions. Word has length 24 [2021-06-05 04:51:57,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:57,438 INFO L482 AbstractCegarLoop]: Abstraction has 1310 states and 4573 transitions. [2021-06-05 04:51:57,438 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:51:57,438 INFO L276 IsEmpty]: Start isEmpty. Operand 1310 states and 4573 transitions. [2021-06-05 04:51:57,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:51:57,439 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:57,439 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:51:57,639 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6193,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:57,640 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:57,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:57,640 INFO L82 PathProgramCache]: Analyzing trace with hash 316771726, now seen corresponding path program 278 times [2021-06-05 04:51:57,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:57,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784225272] [2021-06-05 04:51:57,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:57,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:57,872 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:51:57,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:57,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784225272] [2021-06-05 04:51:57,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784225272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:57,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426477158] [2021-06-05 04:51:57,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:57,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:51:57,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:57,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:51:57,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:58,210 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:51:58,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426477158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:58,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:58,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-06-05 04:51:58,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480166070] [2021-06-05 04:51:58,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:51:58,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:58,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:51:58,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:51:58,211 INFO L87 Difference]: Start difference. First operand 1310 states and 4573 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:00,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:00,786 INFO L93 Difference]: Finished difference Result 2070 states and 6696 transitions. [2021-06-05 04:52:00,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 04:52:00,786 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:52:00,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:00,790 INFO L225 Difference]: With dead ends: 2070 [2021-06-05 04:52:00,790 INFO L226 Difference]: Without dead ends: 1863 [2021-06-05 04:52:00,790 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1142 ImplicationChecksByTransitivity, 2223.4ms TimeCoverageRelationStatistics Valid=464, Invalid=3568, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 04:52:00,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1863 states. [2021-06-05 04:52:00,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1863 to 1361. [2021-06-05 04:52:00,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1361 states, 1360 states have (on average 3.522794117647059) internal successors, (4791), 1360 states have internal predecessors, (4791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:00,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1361 states to 1361 states and 4791 transitions. [2021-06-05 04:52:00,812 INFO L78 Accepts]: Start accepts. Automaton has 1361 states and 4791 transitions. Word has length 24 [2021-06-05 04:52:00,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:00,812 INFO L482 AbstractCegarLoop]: Abstraction has 1361 states and 4791 transitions. [2021-06-05 04:52:00,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:00,812 INFO L276 IsEmpty]: Start isEmpty. Operand 1361 states and 4791 transitions. [2021-06-05 04:52:00,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:52:00,814 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:00,814 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:52:01,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6228,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:01,017 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:01,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:01,017 INFO L82 PathProgramCache]: Analyzing trace with hash 856040988, now seen corresponding path program 279 times [2021-06-05 04:52:01,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:01,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947244747] [2021-06-05 04:52:01,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:01,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:01,124 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:01,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:01,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947244747] [2021-06-05 04:52:01,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947244747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:01,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070774944] [2021-06-05 04:52:01,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:01,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:52:01,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:01,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:52:01,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:01,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:52:01,329 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:01,401 INFO L628 ElimStorePlain]: treesize reduction 56, result has 61.1 percent of original size [2021-06-05 04:52:01,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:01,404 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:01,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:01,407 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:01,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:52:01,410 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:01,457 INFO L628 ElimStorePlain]: treesize reduction 19, result has 75.3 percent of original size [2021-06-05 04:52:01,458 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:52:01,458 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:147, output treesize:58 [2021-06-05 04:52:01,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:01,561 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:01,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:01,564 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:01,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:01,567 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:01,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:52:01,570 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:01,639 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.6 percent of original size [2021-06-05 04:52:01,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:01,642 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:01,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:01,645 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:01,695 INFO L628 ElimStorePlain]: treesize reduction 15, result has 79.7 percent of original size [2021-06-05 04:52:01,696 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:52:01,696 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:99, output treesize:43 [2021-06-05 04:52:01,773 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:52:01,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070774944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:01,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:01,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 04:52:01,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291467963] [2021-06-05 04:52:01,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:52:01,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:01,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:52:01,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:52:01,774 INFO L87 Difference]: Start difference. First operand 1361 states and 4791 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:02,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:02,761 INFO L93 Difference]: Finished difference Result 1718 states and 5748 transitions. [2021-06-05 04:52:02,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:52:02,761 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:52:02,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:02,764 INFO L225 Difference]: With dead ends: 1718 [2021-06-05 04:52:02,764 INFO L226 Difference]: Without dead ends: 1655 [2021-06-05 04:52:02,764 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 896.0ms TimeCoverageRelationStatistics Valid=179, Invalid=943, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 04:52:02,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1655 states. [2021-06-05 04:52:02,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1655 to 1342. [2021-06-05 04:52:02,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1342 states, 1341 states have (on average 3.4966442953020134) internal successors, (4689), 1341 states have internal predecessors, (4689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:02,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1342 states to 1342 states and 4689 transitions. [2021-06-05 04:52:02,778 INFO L78 Accepts]: Start accepts. Automaton has 1342 states and 4689 transitions. Word has length 24 [2021-06-05 04:52:02,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:02,778 INFO L482 AbstractCegarLoop]: Abstraction has 1342 states and 4689 transitions. [2021-06-05 04:52:02,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:02,779 INFO L276 IsEmpty]: Start isEmpty. Operand 1342 states and 4689 transitions. [2021-06-05 04:52:02,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:52:02,780 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:02,780 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:52:02,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6250 [2021-06-05 04:52:02,980 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:02,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:02,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1348636750, now seen corresponding path program 280 times [2021-06-05 04:52:02,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:02,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675903564] [2021-06-05 04:52:02,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:02,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:03,252 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:03,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:03,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675903564] [2021-06-05 04:52:03,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675903564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:03,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647563283] [2021-06-05 04:52:03,252 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:03,358 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:52:03,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:03,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:52:03,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:03,567 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:52:03,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647563283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:03,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:03,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-06-05 04:52:03,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201877675] [2021-06-05 04:52:03,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:52:03,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:03,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:52:03,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:52:03,568 INFO L87 Difference]: Start difference. First operand 1342 states and 4689 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:07,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:07,607 INFO L93 Difference]: Finished difference Result 2255 states and 7301 transitions. [2021-06-05 04:52:07,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 04:52:07,607 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:52:07,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:07,610 INFO L225 Difference]: With dead ends: 2255 [2021-06-05 04:52:07,610 INFO L226 Difference]: Without dead ends: 2058 [2021-06-05 04:52:07,611 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1649 ImplicationChecksByTransitivity, 3684.1ms TimeCoverageRelationStatistics Valid=801, Invalid=4601, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 04:52:07,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2058 states. [2021-06-05 04:52:07,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2058 to 1333. [2021-06-05 04:52:07,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1333 states, 1332 states have (on average 3.4977477477477477) internal successors, (4659), 1332 states have internal predecessors, (4659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:07,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1333 states to 1333 states and 4659 transitions. [2021-06-05 04:52:07,636 INFO L78 Accepts]: Start accepts. Automaton has 1333 states and 4659 transitions. Word has length 24 [2021-06-05 04:52:07,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:07,637 INFO L482 AbstractCegarLoop]: Abstraction has 1333 states and 4659 transitions. [2021-06-05 04:52:07,637 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:07,637 INFO L276 IsEmpty]: Start isEmpty. Operand 1333 states and 4659 transitions. [2021-06-05 04:52:07,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:52:07,638 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:07,638 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:52:07,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 282 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6266 [2021-06-05 04:52:07,839 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:07,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:07,839 INFO L82 PathProgramCache]: Analyzing trace with hash 257555664, now seen corresponding path program 281 times [2021-06-05 04:52:07,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:07,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141831360] [2021-06-05 04:52:07,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:07,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:07,995 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:52:07,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:07,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141831360] [2021-06-05 04:52:07,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141831360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:07,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715725408] [2021-06-05 04:52:07,995 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:08,103 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:52:08,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:08,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 04:52:08,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:08,303 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:52:08,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715725408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:08,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:08,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-06-05 04:52:08,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956940284] [2021-06-05 04:52:08,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:52:08,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:08,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:52:08,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:52:08,304 INFO L87 Difference]: Start difference. First operand 1333 states and 4659 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:12,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:12,396 INFO L93 Difference]: Finished difference Result 2603 states and 8192 transitions. [2021-06-05 04:52:12,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 04:52:12,397 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:52:12,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:12,400 INFO L225 Difference]: With dead ends: 2603 [2021-06-05 04:52:12,400 INFO L226 Difference]: Without dead ends: 2202 [2021-06-05 04:52:12,400 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1367 ImplicationChecksByTransitivity, 3641.2ms TimeCoverageRelationStatistics Valid=681, Invalid=4721, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 04:52:12,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2202 states. [2021-06-05 04:52:12,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2202 to 1438. [2021-06-05 04:52:12,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1438 states, 1437 states have (on average 3.405010438413361) internal successors, (4893), 1437 states have internal predecessors, (4893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:12,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1438 states to 1438 states and 4893 transitions. [2021-06-05 04:52:12,418 INFO L78 Accepts]: Start accepts. Automaton has 1438 states and 4893 transitions. Word has length 24 [2021-06-05 04:52:12,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:12,418 INFO L482 AbstractCegarLoop]: Abstraction has 1438 states and 4893 transitions. [2021-06-05 04:52:12,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:12,418 INFO L276 IsEmpty]: Start isEmpty. Operand 1438 states and 4893 transitions. [2021-06-05 04:52:12,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:52:12,420 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:12,420 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:52:12,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6286 [2021-06-05 04:52:12,620 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:12,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:12,621 INFO L82 PathProgramCache]: Analyzing trace with hash 668428116, now seen corresponding path program 282 times [2021-06-05 04:52:12,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:12,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591724640] [2021-06-05 04:52:12,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:12,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:12,750 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:12,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:12,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591724640] [2021-06-05 04:52:12,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591724640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:12,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709975069] [2021-06-05 04:52:12,751 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:12,856 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:52:12,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:12,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:52:12,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:12,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:12,925 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:12,992 INFO L628 ElimStorePlain]: treesize reduction 58, result has 58.0 percent of original size [2021-06-05 04:52:12,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:12,995 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:13,024 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:13,024 INFO L518 ElimStorePlain]: Eliminatee v_prenex_229 vanished before elimination [2021-06-05 04:52:13,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:52:13,027 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:13,055 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:13,057 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 04:52:13,058 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:142, output treesize:68 [2021-06-05 04:52:13,404 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_233, ends_with_10], 1=[ends_with_6]} [2021-06-05 04:52:13,408 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:52:13,408 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:13,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:13,412 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:13,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:13,416 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:13,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:13,419 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:13,422 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:52:13,423 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:13,425 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:52:13,426 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:13,532 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-06-05 04:52:13,532 INFO L628 ElimStorePlain]: treesize reduction 70, result has 63.9 percent of original size [2021-06-05 04:52:13,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:52:13,536 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:13,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:52:13,539 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:13,596 INFO L628 ElimStorePlain]: treesize reduction 50, result has 57.6 percent of original size [2021-06-05 04:52:13,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:13,600 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:13,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:52:13,602 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:13,634 INFO L628 ElimStorePlain]: treesize reduction 20, result has 67.2 percent of original size [2021-06-05 04:52:13,635 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 3 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:52:13,635 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:303, output treesize:20 [2021-06-05 04:52:13,687 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 04:52:13,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709975069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:13,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:13,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-06-05 04:52:13,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578051964] [2021-06-05 04:52:13,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:52:13,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:13,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:52:13,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:52:13,687 INFO L87 Difference]: Start difference. First operand 1438 states and 4893 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:15,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:15,525 INFO L93 Difference]: Finished difference Result 1986 states and 6506 transitions. [2021-06-05 04:52:15,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 04:52:15,526 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:52:15,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:15,528 INFO L225 Difference]: With dead ends: 1986 [2021-06-05 04:52:15,529 INFO L226 Difference]: Without dead ends: 1869 [2021-06-05 04:52:15,529 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 1440.1ms TimeCoverageRelationStatistics Valid=325, Invalid=2225, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 04:52:15,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1869 states. [2021-06-05 04:52:15,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1869 to 1539. [2021-06-05 04:52:15,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1539 states, 1538 states have (on average 3.4213263979193758) internal successors, (5262), 1538 states have internal predecessors, (5262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:15,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1539 states to 1539 states and 5262 transitions. [2021-06-05 04:52:15,546 INFO L78 Accepts]: Start accepts. Automaton has 1539 states and 5262 transitions. Word has length 24 [2021-06-05 04:52:15,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:15,546 INFO L482 AbstractCegarLoop]: Abstraction has 1539 states and 5262 transitions. [2021-06-05 04:52:15,546 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:15,546 INFO L276 IsEmpty]: Start isEmpty. Operand 1539 states and 5262 transitions. [2021-06-05 04:52:15,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:52:15,547 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:15,547 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:52:15,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6294,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:15,748 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:15,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:15,748 INFO L82 PathProgramCache]: Analyzing trace with hash -1920773996, now seen corresponding path program 283 times [2021-06-05 04:52:15,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:15,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215152049] [2021-06-05 04:52:15,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:15,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:15,916 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:52:15,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:15,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215152049] [2021-06-05 04:52:15,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215152049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:15,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348767143] [2021-06-05 04:52:15,916 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:16,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:16,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 04:52:16,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:16,246 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:52:16,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348767143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:16,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:16,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2021-06-05 04:52:16,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173874015] [2021-06-05 04:52:16,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:52:16,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:16,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:52:16,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:52:16,247 INFO L87 Difference]: Start difference. First operand 1539 states and 5262 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:19,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:19,996 INFO L93 Difference]: Finished difference Result 3301 states and 10511 transitions. [2021-06-05 04:52:19,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 04:52:19,997 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:52:19,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:20,001 INFO L225 Difference]: With dead ends: 3301 [2021-06-05 04:52:20,001 INFO L226 Difference]: Without dead ends: 3123 [2021-06-05 04:52:20,002 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1734 ImplicationChecksByTransitivity, 3232.6ms TimeCoverageRelationStatistics Valid=843, Invalid=5319, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 04:52:20,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3123 states. [2021-06-05 04:52:20,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3123 to 1630. [2021-06-05 04:52:20,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1630 states, 1629 states have (on average 3.481890730509515) internal successors, (5672), 1629 states have internal predecessors, (5672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:20,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1630 states to 1630 states and 5672 transitions. [2021-06-05 04:52:20,026 INFO L78 Accepts]: Start accepts. Automaton has 1630 states and 5672 transitions. Word has length 24 [2021-06-05 04:52:20,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:20,026 INFO L482 AbstractCegarLoop]: Abstraction has 1630 states and 5672 transitions. [2021-06-05 04:52:20,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:20,026 INFO L276 IsEmpty]: Start isEmpty. Operand 1630 states and 5672 transitions. [2021-06-05 04:52:20,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:52:20,027 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:20,028 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:52:20,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6348 [2021-06-05 04:52:20,228 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:20,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:20,228 INFO L82 PathProgramCache]: Analyzing trace with hash -235535934, now seen corresponding path program 284 times [2021-06-05 04:52:20,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:20,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972890417] [2021-06-05 04:52:20,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:20,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:20,332 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:20,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:20,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972890417] [2021-06-05 04:52:20,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972890417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:20,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860540257] [2021-06-05 04:52:20,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:20,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:52:20,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:20,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 04:52:20,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:20,547 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:52:20,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860540257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:20,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:20,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-06-05 04:52:20,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323693834] [2021-06-05 04:52:20,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:52:20,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:20,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:52:20,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:52:20,548 INFO L87 Difference]: Start difference. First operand 1630 states and 5672 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:21,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:21,320 INFO L93 Difference]: Finished difference Result 2215 states and 7479 transitions. [2021-06-05 04:52:21,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 04:52:21,320 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:52:21,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:21,323 INFO L225 Difference]: With dead ends: 2215 [2021-06-05 04:52:21,323 INFO L226 Difference]: Without dead ends: 2163 [2021-06-05 04:52:21,323 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 514.7ms TimeCoverageRelationStatistics Valid=225, Invalid=1415, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 04:52:21,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2163 states. [2021-06-05 04:52:21,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2163 to 1718. [2021-06-05 04:52:21,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1718 states, 1717 states have (on average 3.4857309260337797) internal successors, (5985), 1717 states have internal predecessors, (5985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:21,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1718 states to 1718 states and 5985 transitions. [2021-06-05 04:52:21,342 INFO L78 Accepts]: Start accepts. Automaton has 1718 states and 5985 transitions. Word has length 24 [2021-06-05 04:52:21,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:21,342 INFO L482 AbstractCegarLoop]: Abstraction has 1718 states and 5985 transitions. [2021-06-05 04:52:21,342 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:21,342 INFO L276 IsEmpty]: Start isEmpty. Operand 1718 states and 5985 transitions. [2021-06-05 04:52:21,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:52:21,344 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:21,344 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:52:21,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6356 [2021-06-05 04:52:21,545 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:21,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:21,545 INFO L82 PathProgramCache]: Analyzing trace with hash -458096300, now seen corresponding path program 285 times [2021-06-05 04:52:21,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:21,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323138013] [2021-06-05 04:52:21,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:21,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:21,651 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:21,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:21,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323138013] [2021-06-05 04:52:21,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323138013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:21,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623613552] [2021-06-05 04:52:21,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:21,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:52:21,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:21,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:52:21,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:21,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:52:21,827 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:21,936 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2021-06-05 04:52:21,936 INFO L628 ElimStorePlain]: treesize reduction 31, result has 77.7 percent of original size [2021-06-05 04:52:21,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:21,940 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:21,979 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:21,979 INFO L518 ElimStorePlain]: Eliminatee v_prenex_236 vanished before elimination [2021-06-05 04:52:21,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:21,983 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:22,042 INFO L628 ElimStorePlain]: treesize reduction 24, result has 76.0 percent of original size [2021-06-05 04:52:22,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:52:22,045 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:22,073 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:22,076 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 5 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 04:52:22,076 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:142, output treesize:68 [2021-06-05 04:52:22,482 INFO L446 ElimStorePlain]: Different costs {0=[ends_with_10, v_prenex_239], 1=[ends_with_6]} [2021-06-05 04:52:22,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:52:22,486 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:22,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:52:22,490 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:22,582 INFO L628 ElimStorePlain]: treesize reduction 273, result has 26.8 percent of original size [2021-06-05 04:52:22,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:22,586 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:22,663 INFO L628 ElimStorePlain]: treesize reduction 26, result has 72.9 percent of original size [2021-06-05 04:52:22,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:52:22,667 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:22,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:22,670 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:22,702 INFO L628 ElimStorePlain]: treesize reduction 20, result has 68.3 percent of original size [2021-06-05 04:52:22,703 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 3 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:52:22,703 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 5 variables, input treesize:379, output treesize:20 [2021-06-05 04:52:22,757 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:52:22,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623613552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:22,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:22,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 17 [2021-06-05 04:52:22,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869183937] [2021-06-05 04:52:22,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:52:22,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:22,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:52:22,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:52:22,758 INFO L87 Difference]: Start difference. First operand 1718 states and 5985 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:24,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:24,551 INFO L93 Difference]: Finished difference Result 2520 states and 8276 transitions. [2021-06-05 04:52:24,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 04:52:24,551 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:52:24,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:24,555 INFO L225 Difference]: With dead ends: 2520 [2021-06-05 04:52:24,555 INFO L226 Difference]: Without dead ends: 2369 [2021-06-05 04:52:24,555 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 1248.1ms TimeCoverageRelationStatistics Valid=244, Invalid=2108, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 04:52:24,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2369 states. [2021-06-05 04:52:24,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2369 to 1751. [2021-06-05 04:52:24,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1751 states, 1750 states have (on average 3.4937142857142858) internal successors, (6114), 1750 states have internal predecessors, (6114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:24,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1751 states to 1751 states and 6114 transitions. [2021-06-05 04:52:24,576 INFO L78 Accepts]: Start accepts. Automaton has 1751 states and 6114 transitions. Word has length 24 [2021-06-05 04:52:24,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:24,576 INFO L482 AbstractCegarLoop]: Abstraction has 1751 states and 6114 transitions. [2021-06-05 04:52:24,576 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:24,576 INFO L276 IsEmpty]: Start isEmpty. Operand 1751 states and 6114 transitions. [2021-06-05 04:52:24,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:52:24,578 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:24,578 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:52:24,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6359,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:24,778 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:24,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:24,779 INFO L82 PathProgramCache]: Analyzing trace with hash -2039999204, now seen corresponding path program 286 times [2021-06-05 04:52:24,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:24,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818173131] [2021-06-05 04:52:24,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:24,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:24,944 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:52:24,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:24,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818173131] [2021-06-05 04:52:24,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818173131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:24,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693280790] [2021-06-05 04:52:24,945 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:25,059 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:52:25,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:25,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 04:52:25,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:25,288 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:25,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693280790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:25,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:25,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-06-05 04:52:25,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738619267] [2021-06-05 04:52:25,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:52:25,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:25,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:52:25,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:52:25,288 INFO L87 Difference]: Start difference. First operand 1751 states and 6114 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:28,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:28,959 INFO L93 Difference]: Finished difference Result 3157 states and 10097 transitions. [2021-06-05 04:52:28,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 04:52:28,959 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:52:28,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:28,964 INFO L225 Difference]: With dead ends: 3157 [2021-06-05 04:52:28,964 INFO L226 Difference]: Without dead ends: 2874 [2021-06-05 04:52:28,964 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1396 ImplicationChecksByTransitivity, 3204.0ms TimeCoverageRelationStatistics Valid=618, Invalid=4638, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 04:52:28,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2874 states. [2021-06-05 04:52:28,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2874 to 1764. [2021-06-05 04:52:28,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1764 states, 1763 states have (on average 3.4951786727169596) internal successors, (6162), 1763 states have internal predecessors, (6162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:28,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1764 states to 1764 states and 6162 transitions. [2021-06-05 04:52:28,988 INFO L78 Accepts]: Start accepts. Automaton has 1764 states and 6162 transitions. Word has length 24 [2021-06-05 04:52:28,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:28,988 INFO L482 AbstractCegarLoop]: Abstraction has 1764 states and 6162 transitions. [2021-06-05 04:52:28,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:28,988 INFO L276 IsEmpty]: Start isEmpty. Operand 1764 states and 6162 transitions. [2021-06-05 04:52:28,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:52:28,990 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:28,990 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:52:29,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6443 [2021-06-05 04:52:29,190 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:29,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:29,191 INFO L82 PathProgramCache]: Analyzing trace with hash 133379628, now seen corresponding path program 287 times [2021-06-05 04:52:29,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:29,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518728063] [2021-06-05 04:52:29,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:29,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:29,399 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:52:29,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:29,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518728063] [2021-06-05 04:52:29,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518728063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:29,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097543538] [2021-06-05 04:52:29,400 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:29,540 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:52:29,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:29,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 04:52:29,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:29,753 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:29,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097543538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:29,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:29,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-06-05 04:52:29,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937748468] [2021-06-05 04:52:29,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:52:29,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:29,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:52:29,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:52:29,754 INFO L87 Difference]: Start difference. First operand 1764 states and 6162 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:34,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:34,683 INFO L93 Difference]: Finished difference Result 3655 states and 11498 transitions. [2021-06-05 04:52:34,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-05 04:52:34,683 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:52:34,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:34,688 INFO L225 Difference]: With dead ends: 3655 [2021-06-05 04:52:34,688 INFO L226 Difference]: Without dead ends: 3430 [2021-06-05 04:52:34,689 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2195 ImplicationChecksByTransitivity, 4152.5ms TimeCoverageRelationStatistics Valid=873, Invalid=6609, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 04:52:34,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3430 states. [2021-06-05 04:52:34,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3430 to 1749. [2021-06-05 04:52:34,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1749 states, 1748 states have (on average 3.482265446224256) internal successors, (6087), 1748 states have internal predecessors, (6087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:34,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1749 states to 1749 states and 6087 transitions. [2021-06-05 04:52:34,714 INFO L78 Accepts]: Start accepts. Automaton has 1749 states and 6087 transitions. Word has length 24 [2021-06-05 04:52:34,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:34,715 INFO L482 AbstractCegarLoop]: Abstraction has 1749 states and 6087 transitions. [2021-06-05 04:52:34,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:34,715 INFO L276 IsEmpty]: Start isEmpty. Operand 1749 states and 6087 transitions. [2021-06-05 04:52:34,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:52:34,717 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:34,717 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:52:34,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6449,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:34,917 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:34,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:34,917 INFO L82 PathProgramCache]: Analyzing trace with hash -269481576, now seen corresponding path program 288 times [2021-06-05 04:52:34,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:34,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960219384] [2021-06-05 04:52:34,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:34,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:35,050 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:52:35,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:35,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960219384] [2021-06-05 04:52:35,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960219384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:35,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480421694] [2021-06-05 04:52:35,050 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:35,159 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:52:35,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:35,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 04:52:35,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:35,390 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:35,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480421694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:35,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:35,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-06-05 04:52:35,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074945417] [2021-06-05 04:52:35,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:52:35,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:35,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:52:35,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:52:35,390 INFO L87 Difference]: Start difference. First operand 1749 states and 6087 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:37,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:37,699 INFO L93 Difference]: Finished difference Result 2734 states and 8909 transitions. [2021-06-05 04:52:37,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 04:52:37,699 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:52:37,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:37,703 INFO L225 Difference]: With dead ends: 2734 [2021-06-05 04:52:37,703 INFO L226 Difference]: Without dead ends: 2513 [2021-06-05 04:52:37,703 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 1813.6ms TimeCoverageRelationStatistics Valid=387, Invalid=2919, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 04:52:37,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2513 states. [2021-06-05 04:52:37,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2513 to 1670. [2021-06-05 04:52:37,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1670 states, 1669 states have (on average 3.4703415218693827) internal successors, (5792), 1669 states have internal predecessors, (5792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:37,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1670 states to 1670 states and 5792 transitions. [2021-06-05 04:52:37,724 INFO L78 Accepts]: Start accepts. Automaton has 1670 states and 5792 transitions. Word has length 24 [2021-06-05 04:52:37,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:37,724 INFO L482 AbstractCegarLoop]: Abstraction has 1670 states and 5792 transitions. [2021-06-05 04:52:37,724 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:37,724 INFO L276 IsEmpty]: Start isEmpty. Operand 1670 states and 5792 transitions. [2021-06-05 04:52:37,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:52:37,726 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:37,726 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:52:37,926 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6459 [2021-06-05 04:52:37,927 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:37,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:37,927 INFO L82 PathProgramCache]: Analyzing trace with hash 348529114, now seen corresponding path program 289 times [2021-06-05 04:52:37,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:37,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985449317] [2021-06-05 04:52:37,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:37,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:38,028 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:38,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:38,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985449317] [2021-06-05 04:52:38,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985449317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:38,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509747603] [2021-06-05 04:52:38,028 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:38,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:38,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:52:38,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:38,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:38,198 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:38,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:38,201 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:38,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:38,204 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:38,240 INFO L628 ElimStorePlain]: treesize reduction 23, result has 63.5 percent of original size [2021-06-05 04:52:38,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:38,243 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:38,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:52:38,246 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:38,272 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.0 percent of original size [2021-06-05 04:52:38,273 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:52:38,273 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:75, output treesize:19 [2021-06-05 04:52:38,317 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:52:38,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509747603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:38,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:38,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 14 [2021-06-05 04:52:38,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330481090] [2021-06-05 04:52:38,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:52:38,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:38,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:52:38,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:52:38,317 INFO L87 Difference]: Start difference. First operand 1670 states and 5792 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:38,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:38,713 INFO L93 Difference]: Finished difference Result 1982 states and 6731 transitions. [2021-06-05 04:52:38,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:52:38,713 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:52:38,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:38,716 INFO L225 Difference]: With dead ends: 1982 [2021-06-05 04:52:38,716 INFO L226 Difference]: Without dead ends: 1904 [2021-06-05 04:52:38,716 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 330.0ms TimeCoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:52:38,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1904 states. [2021-06-05 04:52:38,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1904 to 1686. [2021-06-05 04:52:38,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1686 states, 1685 states have (on average 3.4735905044510385) internal successors, (5853), 1685 states have internal predecessors, (5853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:38,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1686 states to 1686 states and 5853 transitions. [2021-06-05 04:52:38,734 INFO L78 Accepts]: Start accepts. Automaton has 1686 states and 5853 transitions. Word has length 24 [2021-06-05 04:52:38,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:38,734 INFO L482 AbstractCegarLoop]: Abstraction has 1686 states and 5853 transitions. [2021-06-05 04:52:38,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:38,734 INFO L276 IsEmpty]: Start isEmpty. Operand 1686 states and 5853 transitions. [2021-06-05 04:52:38,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:52:38,736 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:38,736 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:52:38,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6467,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:38,936 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:38,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:38,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1865966586, now seen corresponding path program 290 times [2021-06-05 04:52:38,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:38,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871103828] [2021-06-05 04:52:38,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:38,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:39,031 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:39,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:39,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871103828] [2021-06-05 04:52:39,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871103828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:39,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887220137] [2021-06-05 04:52:39,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:39,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:52:39,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:39,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:52:39,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:39,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:39,218 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:39,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:39,221 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:39,223 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:52:39,224 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:39,241 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:39,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:39,244 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:39,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:52:39,247 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:39,273 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.0 percent of original size [2021-06-05 04:52:39,274 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:52:39,274 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:75, output treesize:19 [2021-06-05 04:52:39,318 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:52:39,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887220137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:39,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:39,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 15 [2021-06-05 04:52:39,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546459744] [2021-06-05 04:52:39,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:52:39,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:39,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:52:39,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:52:39,319 INFO L87 Difference]: Start difference. First operand 1686 states and 5853 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:39,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:39,720 INFO L93 Difference]: Finished difference Result 2113 states and 7151 transitions. [2021-06-05 04:52:39,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:52:39,720 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:52:39,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:39,723 INFO L225 Difference]: With dead ends: 2113 [2021-06-05 04:52:39,723 INFO L226 Difference]: Without dead ends: 2044 [2021-06-05 04:52:39,723 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 341.1ms TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:52:39,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2044 states. [2021-06-05 04:52:39,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2044 to 1716. [2021-06-05 04:52:39,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1716 states, 1715 states have (on average 3.4816326530612245) internal successors, (5971), 1715 states have internal predecessors, (5971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:39,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1716 states to 1716 states and 5971 transitions. [2021-06-05 04:52:39,742 INFO L78 Accepts]: Start accepts. Automaton has 1716 states and 5971 transitions. Word has length 24 [2021-06-05 04:52:39,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:39,742 INFO L482 AbstractCegarLoop]: Abstraction has 1716 states and 5971 transitions. [2021-06-05 04:52:39,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:39,742 INFO L276 IsEmpty]: Start isEmpty. Operand 1716 states and 5971 transitions. [2021-06-05 04:52:39,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:52:39,744 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:39,744 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:52:39,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6474 [2021-06-05 04:52:39,944 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:39,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:39,945 INFO L82 PathProgramCache]: Analyzing trace with hash -690475942, now seen corresponding path program 291 times [2021-06-05 04:52:39,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:39,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126357121] [2021-06-05 04:52:39,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:39,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:40,041 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:40,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:40,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126357121] [2021-06-05 04:52:40,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126357121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:40,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000288126] [2021-06-05 04:52:40,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:40,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:52:40,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:40,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:52:40,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:40,274 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:52:40,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000288126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:40,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:40,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-05 04:52:40,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610739778] [2021-06-05 04:52:40,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:52:40,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:40,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:52:40,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:52:40,275 INFO L87 Difference]: Start difference. First operand 1716 states and 5971 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:40,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:40,627 INFO L93 Difference]: Finished difference Result 2181 states and 7378 transitions. [2021-06-05 04:52:40,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:52:40,627 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:52:40,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:40,630 INFO L225 Difference]: With dead ends: 2181 [2021-06-05 04:52:40,630 INFO L226 Difference]: Without dead ends: 2121 [2021-06-05 04:52:40,630 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 306.6ms TimeCoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:52:40,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2121 states. [2021-06-05 04:52:40,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2121 to 1750. [2021-06-05 04:52:40,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1750 states, 1749 states have (on average 3.509433962264151) internal successors, (6138), 1749 states have internal predecessors, (6138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:40,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1750 states to 1750 states and 6138 transitions. [2021-06-05 04:52:40,649 INFO L78 Accepts]: Start accepts. Automaton has 1750 states and 6138 transitions. Word has length 24 [2021-06-05 04:52:40,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:40,649 INFO L482 AbstractCegarLoop]: Abstraction has 1750 states and 6138 transitions. [2021-06-05 04:52:40,649 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:40,649 INFO L276 IsEmpty]: Start isEmpty. Operand 1750 states and 6138 transitions. [2021-06-05 04:52:40,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:52:40,651 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:40,651 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:52:40,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6481,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:40,851 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:40,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:40,852 INFO L82 PathProgramCache]: Analyzing trace with hash 923090792, now seen corresponding path program 292 times [2021-06-05 04:52:40,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:40,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49182916] [2021-06-05 04:52:40,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:40,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:40,960 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:40,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:40,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49182916] [2021-06-05 04:52:40,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49182916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:40,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263665493] [2021-06-05 04:52:40,961 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:41,072 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:52:41,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:41,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:52:41,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:41,212 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:52:41,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263665493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:41,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:41,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-05 04:52:41,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467903533] [2021-06-05 04:52:41,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:52:41,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:41,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:52:41,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:52:41,213 INFO L87 Difference]: Start difference. First operand 1750 states and 6138 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:41,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:41,597 INFO L93 Difference]: Finished difference Result 2037 states and 6922 transitions. [2021-06-05 04:52:41,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:52:41,597 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:52:41,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:41,600 INFO L225 Difference]: With dead ends: 2037 [2021-06-05 04:52:41,600 INFO L226 Difference]: Without dead ends: 1968 [2021-06-05 04:52:41,600 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 321.2ms TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:52:41,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1968 states. [2021-06-05 04:52:41,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1968 to 1662. [2021-06-05 04:52:41,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1662 states, 1661 states have (on average 3.4659843467790488) internal successors, (5757), 1661 states have internal predecessors, (5757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:41,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1662 states to 1662 states and 5757 transitions. [2021-06-05 04:52:41,618 INFO L78 Accepts]: Start accepts. Automaton has 1662 states and 5757 transitions. Word has length 24 [2021-06-05 04:52:41,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:41,618 INFO L482 AbstractCegarLoop]: Abstraction has 1662 states and 5757 transitions. [2021-06-05 04:52:41,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:41,618 INFO L276 IsEmpty]: Start isEmpty. Operand 1662 states and 5757 transitions. [2021-06-05 04:52:41,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:52:41,620 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:41,620 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:52:41,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6489,294 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:41,820 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:41,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:41,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1795856550, now seen corresponding path program 293 times [2021-06-05 04:52:41,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:41,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812122242] [2021-06-05 04:52:41,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:41,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:41,913 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:41,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:41,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812122242] [2021-06-05 04:52:41,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812122242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:41,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462966430] [2021-06-05 04:52:41,914 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:42,036 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:52:42,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:42,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:52:42,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:42,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:42,073 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:42,093 INFO L628 ElimStorePlain]: treesize reduction 2, result has 90.9 percent of original size [2021-06-05 04:52:42,093 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:52:42,093 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:20 [2021-06-05 04:52:42,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:42,140 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:42,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:42,143 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:42,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:42,146 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:42,182 INFO L628 ElimStorePlain]: treesize reduction 23, result has 63.5 percent of original size [2021-06-05 04:52:42,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:42,185 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:42,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:52:42,188 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:42,214 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.0 percent of original size [2021-06-05 04:52:42,215 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:52:42,215 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:75, output treesize:19 [2021-06-05 04:52:42,264 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:52:42,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462966430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:42,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:42,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 15 [2021-06-05 04:52:42,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874165533] [2021-06-05 04:52:42,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:52:42,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:42,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:52:42,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:52:42,265 INFO L87 Difference]: Start difference. First operand 1662 states and 5757 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:42,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:42,619 INFO L93 Difference]: Finished difference Result 1959 states and 6670 transitions. [2021-06-05 04:52:42,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:52:42,619 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:52:42,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:42,622 INFO L225 Difference]: With dead ends: 1959 [2021-06-05 04:52:42,622 INFO L226 Difference]: Without dead ends: 1890 [2021-06-05 04:52:42,622 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 314.5ms TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:52:42,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1890 states. [2021-06-05 04:52:42,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1890 to 1713. [2021-06-05 04:52:42,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1713 states, 1712 states have (on average 3.4696261682242993) internal successors, (5940), 1712 states have internal predecessors, (5940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:42,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1713 states to 1713 states and 5940 transitions. [2021-06-05 04:52:42,639 INFO L78 Accepts]: Start accepts. Automaton has 1713 states and 5940 transitions. Word has length 24 [2021-06-05 04:52:42,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:42,639 INFO L482 AbstractCegarLoop]: Abstraction has 1713 states and 5940 transitions. [2021-06-05 04:52:42,640 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:42,640 INFO L276 IsEmpty]: Start isEmpty. Operand 1713 states and 5940 transitions. [2021-06-05 04:52:42,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:52:42,641 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:42,641 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:52:42,842 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6500,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:42,842 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:42,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:42,842 INFO L82 PathProgramCache]: Analyzing trace with hash -620365906, now seen corresponding path program 294 times [2021-06-05 04:52:42,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:42,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770141971] [2021-06-05 04:52:42,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:42,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:42,939 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:42,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:42,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770141971] [2021-06-05 04:52:42,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770141971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:42,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576243182] [2021-06-05 04:52:42,939 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:43,049 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:52:43,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:43,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:52:43,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:43,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:43,086 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:43,105 INFO L628 ElimStorePlain]: treesize reduction 2, result has 90.9 percent of original size [2021-06-05 04:52:43,106 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:52:43,106 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:20 [2021-06-05 04:52:43,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:43,250 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:43,253 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:52:43,253 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:43,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:43,257 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:43,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:52:43,261 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:43,263 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:52:43,264 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:43,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:43,267 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:43,269 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:52:43,270 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:43,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:52:43,273 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:43,344 INFO L628 ElimStorePlain]: treesize reduction 19, result has 81.4 percent of original size [2021-06-05 04:52:43,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:52:43,348 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:43,382 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:43,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:43,393 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:43,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:52:43,396 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:43,452 INFO L628 ElimStorePlain]: treesize reduction 3, result has 95.9 percent of original size [2021-06-05 04:52:43,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:43,456 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:43,494 INFO L628 ElimStorePlain]: treesize reduction 16, result has 75.8 percent of original size [2021-06-05 04:52:43,495 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:52:43,496 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:201, output treesize:34 [2021-06-05 04:52:43,569 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:52:43,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576243182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:43,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:43,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-05 04:52:43,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645344979] [2021-06-05 04:52:43,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:52:43,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:43,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:52:43,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:52:43,570 INFO L87 Difference]: Start difference. First operand 1713 states and 5940 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:43,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:43,963 INFO L93 Difference]: Finished difference Result 2126 states and 7197 transitions. [2021-06-05 04:52:43,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:52:43,964 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:52:43,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:43,967 INFO L225 Difference]: With dead ends: 2126 [2021-06-05 04:52:43,967 INFO L226 Difference]: Without dead ends: 2066 [2021-06-05 04:52:43,967 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 347.1ms TimeCoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:52:43,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2066 states. [2021-06-05 04:52:43,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2066 to 1747. [2021-06-05 04:52:43,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1747 states, 1746 states have (on average 3.497709049255441) internal successors, (6107), 1746 states have internal predecessors, (6107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:43,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1747 states to 1747 states and 6107 transitions. [2021-06-05 04:52:43,986 INFO L78 Accepts]: Start accepts. Automaton has 1747 states and 6107 transitions. Word has length 24 [2021-06-05 04:52:43,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:43,986 INFO L482 AbstractCegarLoop]: Abstraction has 1747 states and 6107 transitions. [2021-06-05 04:52:43,986 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:43,986 INFO L276 IsEmpty]: Start isEmpty. Operand 1747 states and 6107 transitions. [2021-06-05 04:52:43,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:52:43,988 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:43,988 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:52:44,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6508 [2021-06-05 04:52:44,189 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:44,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:44,189 INFO L82 PathProgramCache]: Analyzing trace with hash 993200828, now seen corresponding path program 295 times [2021-06-05 04:52:44,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:44,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410637139] [2021-06-05 04:52:44,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:44,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:44,304 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:44,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:44,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410637139] [2021-06-05 04:52:44,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410637139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:44,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434656685] [2021-06-05 04:52:44,305 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:44,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:44,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:52:44,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:44,467 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:52:44,468 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:44,492 INFO L628 ElimStorePlain]: treesize reduction 2, result has 92.3 percent of original size [2021-06-05 04:52:44,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:44,495 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:44,505 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:44,506 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:52:44,506 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:41, output treesize:20 [2021-06-05 04:52:44,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:44,651 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:44,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:52:44,654 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:44,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:44,657 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:44,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:44,661 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:44,663 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:52:44,663 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:44,715 INFO L628 ElimStorePlain]: treesize reduction 43, result has 59.0 percent of original size [2021-06-05 04:52:44,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:52:44,718 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:44,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:44,721 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:44,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:44,724 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:44,761 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.0 percent of original size [2021-06-05 04:52:44,761 INFO L518 ElimStorePlain]: Eliminatee ends_with_10 vanished before elimination [2021-06-05 04:52:44,763 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:52:44,763 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 4 variables, input treesize:146, output treesize:34 [2021-06-05 04:52:44,834 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:52:44,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434656685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:44,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:44,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-05 04:52:44,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229349755] [2021-06-05 04:52:44,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:52:44,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:44,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:52:44,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:52:44,835 INFO L87 Difference]: Start difference. First operand 1747 states and 6107 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:45,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:45,223 INFO L93 Difference]: Finished difference Result 1982 states and 6741 transitions. [2021-06-05 04:52:45,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:52:45,224 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:52:45,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:45,227 INFO L225 Difference]: With dead ends: 1982 [2021-06-05 04:52:45,227 INFO L226 Difference]: Without dead ends: 1915 [2021-06-05 04:52:45,227 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 345.5ms TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:52:45,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1915 states. [2021-06-05 04:52:45,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1915 to 1683. [2021-06-05 04:52:45,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1683 states, 1682 states have (on average 3.460166468489893) internal successors, (5820), 1682 states have internal predecessors, (5820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:45,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1683 states to 1683 states and 5820 transitions. [2021-06-05 04:52:45,244 INFO L78 Accepts]: Start accepts. Automaton has 1683 states and 5820 transitions. Word has length 24 [2021-06-05 04:52:45,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:45,245 INFO L482 AbstractCegarLoop]: Abstraction has 1683 states and 5820 transitions. [2021-06-05 04:52:45,245 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:45,245 INFO L276 IsEmpty]: Start isEmpty. Operand 1683 states and 5820 transitions. [2021-06-05 04:52:45,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:52:45,246 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:45,247 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:52:45,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6551 [2021-06-05 04:52:45,447 INFO L430 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:45,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:45,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1460105690, now seen corresponding path program 296 times [2021-06-05 04:52:45,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:45,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031143319] [2021-06-05 04:52:45,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:45,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:45,549 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:45,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:45,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031143319] [2021-06-05 04:52:45,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031143319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:45,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602234289] [2021-06-05 04:52:45,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:45,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:52:45,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:45,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:52:45,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:45,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:45,736 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:45,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:52:45,739 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:45,790 INFO L628 ElimStorePlain]: treesize reduction 26, result has 70.5 percent of original size [2021-06-05 04:52:45,790 INFO L518 ElimStorePlain]: Eliminatee v_prenex_244 vanished before elimination [2021-06-05 04:52:45,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:45,793 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:45,816 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:45,817 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:52:45,817 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:95, output treesize:58 [2021-06-05 04:52:45,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:52:45,892 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:45,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:45,895 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:45,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:45,898 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:45,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:45,901 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:45,970 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.6 percent of original size [2021-06-05 04:52:45,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:45,973 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:45,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:45,976 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:46,026 INFO L628 ElimStorePlain]: treesize reduction 15, result has 79.7 percent of original size [2021-06-05 04:52:46,028 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:52:46,028 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:99, output treesize:43 [2021-06-05 04:52:46,107 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:52:46,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602234289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:46,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:46,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-05 04:52:46,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749983646] [2021-06-05 04:52:46,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:52:46,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:46,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:52:46,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:52:46,107 INFO L87 Difference]: Start difference. First operand 1683 states and 5820 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:46,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:46,483 INFO L93 Difference]: Finished difference Result 2009 states and 6829 transitions. [2021-06-05 04:52:46,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:52:46,483 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:52:46,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:46,486 INFO L225 Difference]: With dead ends: 2009 [2021-06-05 04:52:46,486 INFO L226 Difference]: Without dead ends: 1949 [2021-06-05 04:52:46,486 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 370.7ms TimeCoverageRelationStatistics Valid=127, Invalid=473, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:52:46,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1949 states. [2021-06-05 04:52:46,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1949 to 1736. [2021-06-05 04:52:46,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1736 states, 1735 states have (on average 3.4933717579250723) internal successors, (6061), 1735 states have internal predecessors, (6061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:46,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1736 states to 1736 states and 6061 transitions. [2021-06-05 04:52:46,504 INFO L78 Accepts]: Start accepts. Automaton has 1736 states and 6061 transitions. Word has length 24 [2021-06-05 04:52:46,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:46,504 INFO L482 AbstractCegarLoop]: Abstraction has 1736 states and 6061 transitions. [2021-06-05 04:52:46,504 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:46,504 INFO L276 IsEmpty]: Start isEmpty. Operand 1736 states and 6061 transitions. [2021-06-05 04:52:46,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:52:46,506 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:46,506 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:52:46,707 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6593 [2021-06-05 04:52:46,707 INFO L430 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:46,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:46,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1221294872, now seen corresponding path program 297 times [2021-06-05 04:52:46,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:46,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417083585] [2021-06-05 04:52:46,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:46,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:46,804 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:46,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:46,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417083585] [2021-06-05 04:52:46,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417083585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:46,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857727545] [2021-06-05 04:52:46,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:46,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:52:46,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:46,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:52:46,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:47,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:52:47,001 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:47,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:47,004 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:47,055 INFO L628 ElimStorePlain]: treesize reduction 26, result has 70.5 percent of original size [2021-06-05 04:52:47,055 INFO L518 ElimStorePlain]: Eliminatee v_prenex_246 vanished before elimination [2021-06-05 04:52:47,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:47,058 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:47,081 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:47,081 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:52:47,081 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:95, output treesize:58 [2021-06-05 04:52:47,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:47,152 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:47,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:47,156 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:47,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:47,159 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:47,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:52:47,162 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:47,231 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.6 percent of original size [2021-06-05 04:52:47,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:47,234 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:47,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:47,237 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:47,287 INFO L628 ElimStorePlain]: treesize reduction 15, result has 79.7 percent of original size [2021-06-05 04:52:47,288 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:52:47,289 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:99, output treesize:43 [2021-06-05 04:52:47,365 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:52:47,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857727545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:47,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:47,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-05 04:52:47,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89443115] [2021-06-05 04:52:47,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:52:47,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:47,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:52:47,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:52:47,365 INFO L87 Difference]: Start difference. First operand 1736 states and 6061 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:47,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:47,791 INFO L93 Difference]: Finished difference Result 2012 states and 6773 transitions. [2021-06-05 04:52:47,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:52:47,792 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:52:47,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:47,794 INFO L225 Difference]: With dead ends: 2012 [2021-06-05 04:52:47,794 INFO L226 Difference]: Without dead ends: 1947 [2021-06-05 04:52:47,794 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 438.1ms TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:52:47,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1947 states. [2021-06-05 04:52:47,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1947 to 1705. [2021-06-05 04:52:47,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1705 states, 1704 states have (on average 3.466549295774648) internal successors, (5907), 1704 states have internal predecessors, (5907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:47,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1705 states to 1705 states and 5907 transitions. [2021-06-05 04:52:47,812 INFO L78 Accepts]: Start accepts. Automaton has 1705 states and 5907 transitions. Word has length 24 [2021-06-05 04:52:47,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:47,813 INFO L482 AbstractCegarLoop]: Abstraction has 1705 states and 5907 transitions. [2021-06-05 04:52:47,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:47,813 INFO L276 IsEmpty]: Start isEmpty. Operand 1705 states and 5907 transitions. [2021-06-05 04:52:47,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:52:47,815 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:47,815 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:52:48,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6612,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:48,015 INFO L430 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:48,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:48,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1554633626, now seen corresponding path program 298 times [2021-06-05 04:52:48,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:48,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861746539] [2021-06-05 04:52:48,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:48,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:48,155 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:48,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:48,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861746539] [2021-06-05 04:52:48,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861746539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:48,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869740971] [2021-06-05 04:52:48,155 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:48,278 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:52:48,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:48,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:52:48,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:48,495 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:52:48,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869740971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:48,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:48,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-06-05 04:52:48,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130634920] [2021-06-05 04:52:48,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:52:48,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:48,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:52:48,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:52:48,496 INFO L87 Difference]: Start difference. First operand 1705 states and 5907 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:49,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:49,375 INFO L93 Difference]: Finished difference Result 1993 states and 6667 transitions. [2021-06-05 04:52:49,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 04:52:49,375 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:52:49,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:49,378 INFO L225 Difference]: With dead ends: 1993 [2021-06-05 04:52:49,378 INFO L226 Difference]: Without dead ends: 1894 [2021-06-05 04:52:49,378 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 701.3ms TimeCoverageRelationStatistics Valid=155, Invalid=1177, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 04:52:49,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1894 states. [2021-06-05 04:52:49,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1894 to 1654. [2021-06-05 04:52:49,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1654 states, 1653 states have (on average 3.468844525105868) internal successors, (5734), 1653 states have internal predecessors, (5734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:49,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1654 states to 1654 states and 5734 transitions. [2021-06-05 04:52:49,395 INFO L78 Accepts]: Start accepts. Automaton has 1654 states and 5734 transitions. Word has length 24 [2021-06-05 04:52:49,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:49,395 INFO L482 AbstractCegarLoop]: Abstraction has 1654 states and 5734 transitions. [2021-06-05 04:52:49,395 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:49,395 INFO L276 IsEmpty]: Start isEmpty. Operand 1654 states and 5734 transitions. [2021-06-05 04:52:49,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:52:49,397 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:49,397 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:52:49,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6631 [2021-06-05 04:52:49,598 INFO L430 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:49,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:49,598 INFO L82 PathProgramCache]: Analyzing trace with hash 377554566, now seen corresponding path program 299 times [2021-06-05 04:52:49,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:49,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134711049] [2021-06-05 04:52:49,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:49,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:49,712 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:49,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:49,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134711049] [2021-06-05 04:52:49,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134711049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:49,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763724397] [2021-06-05 04:52:49,713 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:49,835 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:52:49,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:49,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:52:49,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:49,875 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:52:49,876 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:49,899 INFO L628 ElimStorePlain]: treesize reduction 2, result has 92.3 percent of original size [2021-06-05 04:52:49,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:49,902 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:49,912 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:49,913 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:52:49,913 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:41, output treesize:20 [2021-06-05 04:52:49,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:49,977 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:49,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:49,980 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:49,982 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:52:49,983 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:50,003 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:50,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:50,006 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:50,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:52:50,009 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:50,037 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.0 percent of original size [2021-06-05 04:52:50,038 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:52:50,038 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:75, output treesize:19 [2021-06-05 04:52:50,085 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:52:50,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763724397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:50,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:50,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 15 [2021-06-05 04:52:50,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282584605] [2021-06-05 04:52:50,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:52:50,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:50,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:52:50,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:52:50,086 INFO L87 Difference]: Start difference. First operand 1654 states and 5734 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:50,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:50,484 INFO L93 Difference]: Finished difference Result 1946 states and 6629 transitions. [2021-06-05 04:52:50,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:52:50,485 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:52:50,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:50,487 INFO L225 Difference]: With dead ends: 1946 [2021-06-05 04:52:50,487 INFO L226 Difference]: Without dead ends: 1877 [2021-06-05 04:52:50,487 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 359.2ms TimeCoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:52:50,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1877 states. [2021-06-05 04:52:50,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1877 to 1700. [2021-06-05 04:52:50,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1700 states, 1699 states have (on average 3.472042377869335) internal successors, (5899), 1699 states have internal predecessors, (5899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:50,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1700 states to 1700 states and 5899 transitions. [2021-06-05 04:52:50,504 INFO L78 Accepts]: Start accepts. Automaton has 1700 states and 5899 transitions. Word has length 24 [2021-06-05 04:52:50,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:50,504 INFO L482 AbstractCegarLoop]: Abstraction has 1700 states and 5899 transitions. [2021-06-05 04:52:50,504 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:50,504 INFO L276 IsEmpty]: Start isEmpty. Operand 1700 states and 5899 transitions. [2021-06-05 04:52:50,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:52:50,506 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:50,506 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:52:50,706 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6650,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:50,707 INFO L430 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:50,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:50,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1553045210, now seen corresponding path program 300 times [2021-06-05 04:52:50,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:50,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434371554] [2021-06-05 04:52:50,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:50,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:50,810 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:50,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:50,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434371554] [2021-06-05 04:52:50,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434371554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:50,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544317168] [2021-06-05 04:52:50,810 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:50,920 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:52:50,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:50,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:52:50,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:50,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:50,956 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:50,975 INFO L628 ElimStorePlain]: treesize reduction 2, result has 90.9 percent of original size [2021-06-05 04:52:50,976 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:52:50,976 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:20 [2021-06-05 04:52:51,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:51,059 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:51,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:52:51,063 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:51,066 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:52:51,066 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:51,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:52:51,070 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:51,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:51,073 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:51,076 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:52:51,077 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:51,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:52:51,080 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:51,124 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:51,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:52:51,127 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:51,195 INFO L628 ElimStorePlain]: treesize reduction 20, result has 80.0 percent of original size [2021-06-05 04:52:51,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:51,198 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:51,270 INFO L628 ElimStorePlain]: treesize reduction 3, result has 96.1 percent of original size [2021-06-05 04:52:51,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:52:51,274 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:51,300 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:51,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:51,303 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:51,343 INFO L628 ElimStorePlain]: treesize reduction 16, result has 75.8 percent of original size [2021-06-05 04:52:51,344 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 5 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:52:51,344 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 6 variables, input treesize:169, output treesize:34 [2021-06-05 04:52:51,416 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:52:51,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544317168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:51,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:51,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-05 04:52:51,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638366420] [2021-06-05 04:52:51,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:52:51,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:51,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:52:51,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:52:51,417 INFO L87 Difference]: Start difference. First operand 1700 states and 5899 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:51,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:51,864 INFO L93 Difference]: Finished difference Result 2113 states and 7156 transitions. [2021-06-05 04:52:51,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:52:51,865 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:52:51,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:51,868 INFO L225 Difference]: With dead ends: 2113 [2021-06-05 04:52:51,868 INFO L226 Difference]: Without dead ends: 2053 [2021-06-05 04:52:51,868 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 370.3ms TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:52:51,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2053 states. [2021-06-05 04:52:51,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2053 to 1734. [2021-06-05 04:52:51,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1734 states, 1733 states have (on average 3.500288517022504) internal successors, (6066), 1733 states have internal predecessors, (6066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:51,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1734 states to 1734 states and 6066 transitions. [2021-06-05 04:52:51,886 INFO L78 Accepts]: Start accepts. Automaton has 1734 states and 6066 transitions. Word has length 24 [2021-06-05 04:52:51,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:51,886 INFO L482 AbstractCegarLoop]: Abstraction has 1734 states and 6066 transitions. [2021-06-05 04:52:51,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:51,887 INFO L276 IsEmpty]: Start isEmpty. Operand 1734 states and 6066 transitions. [2021-06-05 04:52:51,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:52:51,888 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:51,889 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:52:52,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6657,302 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:52,089 INFO L430 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:52,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:52,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1128355352, now seen corresponding path program 301 times [2021-06-05 04:52:52,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:52,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670444528] [2021-06-05 04:52:52,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:52,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:52,283 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:52,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:52,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670444528] [2021-06-05 04:52:52,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670444528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:52,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564544140] [2021-06-05 04:52:52,283 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:52,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:52,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:52:52,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:52,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:52,476 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:52,485 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:52,486 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-05 04:52:52,486 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:20 [2021-06-05 04:52:52,692 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:52:52,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564544140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:52,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:52,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-06-05 04:52:52,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401556310] [2021-06-05 04:52:52,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:52:52,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:52,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:52:52,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:52:52,693 INFO L87 Difference]: Start difference. First operand 1734 states and 6066 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:54,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:54,214 INFO L93 Difference]: Finished difference Result 2180 states and 7268 transitions. [2021-06-05 04:52:54,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 04:52:54,215 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:52:54,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:54,218 INFO L225 Difference]: With dead ends: 2180 [2021-06-05 04:52:54,218 INFO L226 Difference]: Without dead ends: 2099 [2021-06-05 04:52:54,218 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 1263.5ms TimeCoverageRelationStatistics Valid=231, Invalid=1749, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 04:52:54,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2099 states. [2021-06-05 04:52:54,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2099 to 1670. [2021-06-05 04:52:54,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1670 states, 1669 states have (on average 3.4625524266027563) internal successors, (5779), 1669 states have internal predecessors, (5779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:54,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1670 states to 1670 states and 5779 transitions. [2021-06-05 04:52:54,236 INFO L78 Accepts]: Start accepts. Automaton has 1670 states and 5779 transitions. Word has length 24 [2021-06-05 04:52:54,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:54,236 INFO L482 AbstractCegarLoop]: Abstraction has 1670 states and 5779 transitions. [2021-06-05 04:52:54,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:54,236 INFO L276 IsEmpty]: Start isEmpty. Operand 1670 states and 5779 transitions. [2021-06-05 04:52:54,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:52:54,238 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:54,238 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:52:54,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 303 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6672 [2021-06-05 04:52:54,438 INFO L430 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:54,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:54,438 INFO L82 PathProgramCache]: Analyzing trace with hash -661450490, now seen corresponding path program 302 times [2021-06-05 04:52:54,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:54,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383635103] [2021-06-05 04:52:54,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:54,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:54,537 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:54,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:54,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383635103] [2021-06-05 04:52:54,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383635103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:54,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901134151] [2021-06-05 04:52:54,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:54,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:52:54,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:54,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:52:54,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:54,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:52:54,727 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:54,802 INFO L628 ElimStorePlain]: treesize reduction 53, result has 62.4 percent of original size [2021-06-05 04:52:54,802 INFO L518 ElimStorePlain]: Eliminatee v_prenex_253 vanished before elimination [2021-06-05 04:52:54,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:54,806 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:54,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:52:54,809 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:54,840 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:54,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:54,843 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:54,890 INFO L628 ElimStorePlain]: treesize reduction 19, result has 75.3 percent of original size [2021-06-05 04:52:54,891 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:52:54,891 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:144, output treesize:58 [2021-06-05 04:52:54,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:52:54,961 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:54,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:54,965 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:54,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:54,968 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:54,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:54,971 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:55,039 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.6 percent of original size [2021-06-05 04:52:55,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:55,043 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:55,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:52:55,046 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:55,096 INFO L628 ElimStorePlain]: treesize reduction 15, result has 79.7 percent of original size [2021-06-05 04:52:55,097 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:52:55,097 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:99, output treesize:43 [2021-06-05 04:52:55,174 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:52:55,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901134151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:55,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:55,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-05 04:52:55,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500339037] [2021-06-05 04:52:55,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:52:55,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:55,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:52:55,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:52:55,175 INFO L87 Difference]: Start difference. First operand 1670 states and 5779 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:55,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:55,575 INFO L93 Difference]: Finished difference Result 1989 states and 6754 transitions. [2021-06-05 04:52:55,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:52:55,576 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:52:55,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:55,578 INFO L225 Difference]: With dead ends: 1989 [2021-06-05 04:52:55,578 INFO L226 Difference]: Without dead ends: 1929 [2021-06-05 04:52:55,578 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 386.8ms TimeCoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:52:55,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1929 states. [2021-06-05 04:52:55,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1929 to 1716. [2021-06-05 04:52:55,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1716 states, 1715 states have (on average 3.4903790087463555) internal successors, (5986), 1715 states have internal predecessors, (5986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:55,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1716 states to 1716 states and 5986 transitions. [2021-06-05 04:52:55,596 INFO L78 Accepts]: Start accepts. Automaton has 1716 states and 5986 transitions. Word has length 24 [2021-06-05 04:52:55,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:55,596 INFO L482 AbstractCegarLoop]: Abstraction has 1716 states and 5986 transitions. [2021-06-05 04:52:55,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:55,597 INFO L276 IsEmpty]: Start isEmpty. Operand 1716 states and 5986 transitions. [2021-06-05 04:52:55,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:52:55,598 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:55,598 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:52:55,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6710,304 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:55,799 INFO L430 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:55,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:55,799 INFO L82 PathProgramCache]: Analyzing trace with hash 952116244, now seen corresponding path program 303 times [2021-06-05 04:52:55,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:55,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762673028] [2021-06-05 04:52:55,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:55,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:55,935 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:55,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:55,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762673028] [2021-06-05 04:52:55,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762673028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:55,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121581284] [2021-06-05 04:52:55,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:56,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:52:56,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:56,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:52:56,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:56,290 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:52:56,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121581284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:56,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:56,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-06-05 04:52:56,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799595112] [2021-06-05 04:52:56,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:52:56,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:56,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:52:56,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:52:56,291 INFO L87 Difference]: Start difference. First operand 1716 states and 5986 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:57,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:57,732 INFO L93 Difference]: Finished difference Result 2227 states and 7324 transitions. [2021-06-05 04:52:57,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 04:52:57,732 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:52:57,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:57,735 INFO L225 Difference]: With dead ends: 2227 [2021-06-05 04:52:57,736 INFO L226 Difference]: Without dead ends: 2115 [2021-06-05 04:52:57,736 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 1158.3ms TimeCoverageRelationStatistics Valid=266, Invalid=1896, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 04:52:57,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2115 states. [2021-06-05 04:52:57,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2115 to 1673. [2021-06-05 04:52:57,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1673 states, 1672 states have (on average 3.4671052631578947) internal successors, (5797), 1672 states have internal predecessors, (5797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:57,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1673 states to 1673 states and 5797 transitions. [2021-06-05 04:52:57,755 INFO L78 Accepts]: Start accepts. Automaton has 1673 states and 5797 transitions. Word has length 24 [2021-06-05 04:52:57,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:57,755 INFO L482 AbstractCegarLoop]: Abstraction has 1673 states and 5797 transitions. [2021-06-05 04:52:57,755 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:52:57,755 INFO L276 IsEmpty]: Start isEmpty. Operand 1673 states and 5797 transitions. [2021-06-05 04:52:57,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:52:57,757 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:57,757 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:52:57,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6726 [2021-06-05 04:52:57,957 INFO L430 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:57,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:57,957 INFO L82 PathProgramCache]: Analyzing trace with hash -591340454, now seen corresponding path program 304 times [2021-06-05 04:52:57,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:57,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605922436] [2021-06-05 04:52:57,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:57,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:58,107 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:52:58,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:58,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605922436] [2021-06-05 04:52:58,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605922436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:58,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774255314] [2021-06-05 04:52:58,108 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:58,218 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:52:58,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:58,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:52:58,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:58,442 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:52:58,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774255314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:58,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:58,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-06-05 04:52:58,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477311175] [2021-06-05 04:52:58,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:52:58,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:58,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:52:58,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:52:58,442 INFO L87 Difference]: Start difference. First operand 1673 states and 5797 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:00,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:00,611 INFO L93 Difference]: Finished difference Result 2322 states and 7662 transitions. [2021-06-05 04:53:00,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 04:53:00,611 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:53:00,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:00,614 INFO L225 Difference]: With dead ends: 2322 [2021-06-05 04:53:00,614 INFO L226 Difference]: Without dead ends: 2172 [2021-06-05 04:53:00,614 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 921 ImplicationChecksByTransitivity, 1765.8ms TimeCoverageRelationStatistics Valid=411, Invalid=3011, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 04:53:00,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-06-05 04:53:00,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 1686. [2021-06-05 04:53:00,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1686 states, 1685 states have (on average 3.4949554896142434) internal successors, (5889), 1685 states have internal predecessors, (5889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:00,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1686 states to 1686 states and 5889 transitions. [2021-06-05 04:53:00,633 INFO L78 Accepts]: Start accepts. Automaton has 1686 states and 5889 transitions. Word has length 24 [2021-06-05 04:53:00,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:00,633 INFO L482 AbstractCegarLoop]: Abstraction has 1686 states and 5889 transitions. [2021-06-05 04:53:00,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:00,633 INFO L276 IsEmpty]: Start isEmpty. Operand 1686 states and 5889 transitions. [2021-06-05 04:53:00,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:53:00,635 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:00,635 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:53:00,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6751 [2021-06-05 04:53:00,836 INFO L430 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:00,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:00,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1349954870, now seen corresponding path program 305 times [2021-06-05 04:53:00,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:00,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503907798] [2021-06-05 04:53:00,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:00,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:01,054 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:01,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:01,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503907798] [2021-06-05 04:53:01,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503907798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:01,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057580352] [2021-06-05 04:53:01,055 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:01,200 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:53:01,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:01,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:53:01,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:01,422 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:53:01,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057580352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:01,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:01,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-06-05 04:53:01,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334868157] [2021-06-05 04:53:01,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:53:01,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:01,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:53:01,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:53:01,423 INFO L87 Difference]: Start difference. First operand 1686 states and 5889 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:03,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:03,328 INFO L93 Difference]: Finished difference Result 2053 states and 6839 transitions. [2021-06-05 04:53:03,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 04:53:03,329 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:53:03,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:03,331 INFO L225 Difference]: With dead ends: 2053 [2021-06-05 04:53:03,331 INFO L226 Difference]: Without dead ends: 1920 [2021-06-05 04:53:03,332 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 1548.7ms TimeCoverageRelationStatistics Valid=399, Invalid=2793, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 04:53:03,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1920 states. [2021-06-05 04:53:03,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1920 to 1672. [2021-06-05 04:53:03,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1672 states, 1671 states have (on average 3.485338120885697) internal successors, (5824), 1671 states have internal predecessors, (5824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:03,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1672 states to 1672 states and 5824 transitions. [2021-06-05 04:53:03,349 INFO L78 Accepts]: Start accepts. Automaton has 1672 states and 5824 transitions. Word has length 24 [2021-06-05 04:53:03,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:03,349 INFO L482 AbstractCegarLoop]: Abstraction has 1672 states and 5824 transitions. [2021-06-05 04:53:03,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:03,349 INFO L276 IsEmpty]: Start isEmpty. Operand 1672 states and 5824 transitions. [2021-06-05 04:53:03,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:53:03,351 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:03,351 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:53:03,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6769 [2021-06-05 04:53:03,552 INFO L430 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:03,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:03,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1601280286, now seen corresponding path program 306 times [2021-06-05 04:53:03,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:03,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940523217] [2021-06-05 04:53:03,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:03,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:03,647 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:03,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:03,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940523217] [2021-06-05 04:53:03,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940523217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:03,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661599210] [2021-06-05 04:53:03,647 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:03,759 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:53:03,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:03,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:53:03,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:03,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:53:03,812 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:03,889 INFO L628 ElimStorePlain]: treesize reduction 63, result has 61.3 percent of original size [2021-06-05 04:53:03,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:53:03,893 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:03,948 INFO L628 ElimStorePlain]: treesize reduction 21, result has 77.7 percent of original size [2021-06-05 04:53:03,948 INFO L518 ElimStorePlain]: Eliminatee v_prenex_257 vanished before elimination [2021-06-05 04:53:03,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:53:03,951 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:03,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:53:03,954 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:03,977 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:03,978 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:53:03,978 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:168, output treesize:62 [2021-06-05 04:53:04,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:04,105 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:04,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:53:04,107 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:04,122 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:04,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:04,125 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:04,139 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:04,139 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:53:04,140 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:42, output treesize:16 [2021-06-05 04:53:04,164 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:53:04,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661599210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:04,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:04,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-05 04:53:04,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034071230] [2021-06-05 04:53:04,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:53:04,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:04,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:53:04,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:53:04,165 INFO L87 Difference]: Start difference. First operand 1672 states and 5824 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:04,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:04,763 INFO L93 Difference]: Finished difference Result 1974 states and 6688 transitions. [2021-06-05 04:53:04,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:53:04,763 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:53:04,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:04,766 INFO L225 Difference]: With dead ends: 1974 [2021-06-05 04:53:04,766 INFO L226 Difference]: Without dead ends: 1899 [2021-06-05 04:53:04,766 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 536.5ms TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:53:04,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1899 states. [2021-06-05 04:53:04,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1899 to 1672. [2021-06-05 04:53:04,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1672 states, 1671 states have (on average 3.473967684021544) internal successors, (5805), 1671 states have internal predecessors, (5805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:04,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1672 states to 1672 states and 5805 transitions. [2021-06-05 04:53:04,783 INFO L78 Accepts]: Start accepts. Automaton has 1672 states and 5805 transitions. Word has length 24 [2021-06-05 04:53:04,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:04,783 INFO L482 AbstractCegarLoop]: Abstraction has 1672 states and 5805 transitions. [2021-06-05 04:53:04,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:04,783 INFO L276 IsEmpty]: Start isEmpty. Operand 1672 states and 5805 transitions. [2021-06-05 04:53:04,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:53:04,785 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:04,785 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:53:04,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 308 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6785 [2021-06-05 04:53:04,985 INFO L430 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:04,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:04,986 INFO L82 PathProgramCache]: Analyzing trace with hash -308120276, now seen corresponding path program 307 times [2021-06-05 04:53:04,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:04,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458162598] [2021-06-05 04:53:04,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:04,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:05,091 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:05,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:05,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458162598] [2021-06-05 04:53:05,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458162598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:05,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035050760] [2021-06-05 04:53:05,091 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:05,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:05,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:53:05,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:05,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:53:05,266 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:05,336 INFO L628 ElimStorePlain]: treesize reduction 6, result has 94.3 percent of original size [2021-06-05 04:53:05,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:53:05,340 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:05,393 INFO L628 ElimStorePlain]: treesize reduction 21, result has 77.7 percent of original size [2021-06-05 04:53:05,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:53:05,396 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:05,421 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:05,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:53:05,425 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:05,448 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:05,449 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:53:05,449 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:111, output treesize:62 [2021-06-05 04:53:05,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:53:05,563 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:05,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:05,566 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:05,581 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:05,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:05,583 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:05,597 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:05,598 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:53:05,598 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:42, output treesize:16 [2021-06-05 04:53:05,623 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:53:05,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035050760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:05,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:05,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-05 04:53:05,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018548955] [2021-06-05 04:53:05,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:53:05,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:05,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:53:05,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:53:05,624 INFO L87 Difference]: Start difference. First operand 1672 states and 5805 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:06,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:06,394 INFO L93 Difference]: Finished difference Result 1887 states and 6401 transitions. [2021-06-05 04:53:06,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:53:06,395 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:53:06,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:06,397 INFO L225 Difference]: With dead ends: 1887 [2021-06-05 04:53:06,397 INFO L226 Difference]: Without dead ends: 1794 [2021-06-05 04:53:06,398 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 688.0ms TimeCoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:53:06,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1794 states. [2021-06-05 04:53:06,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1794 to 1670. [2021-06-05 04:53:06,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1670 states, 1669 states have (on average 3.4661473936488916) internal successors, (5785), 1669 states have internal predecessors, (5785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:06,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1670 states to 1670 states and 5785 transitions. [2021-06-05 04:53:06,414 INFO L78 Accepts]: Start accepts. Automaton has 1670 states and 5785 transitions. Word has length 24 [2021-06-05 04:53:06,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:06,414 INFO L482 AbstractCegarLoop]: Abstraction has 1670 states and 5785 transitions. [2021-06-05 04:53:06,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:06,415 INFO L276 IsEmpty]: Start isEmpty. Operand 1670 states and 5785 transitions. [2021-06-05 04:53:06,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:53:06,416 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:06,416 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:53:06,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6799,309 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:06,617 INFO L430 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:06,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:06,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1902468142, now seen corresponding path program 308 times [2021-06-05 04:53:06,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:06,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503646163] [2021-06-05 04:53:06,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:06,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:06,769 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:53:06,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:06,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503646163] [2021-06-05 04:53:06,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503646163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:06,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250366119] [2021-06-05 04:53:06,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:06,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:53:06,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:06,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 04:53:06,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:07,084 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:53:07,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250366119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:07,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:07,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-06-05 04:53:07,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102561875] [2021-06-05 04:53:07,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:53:07,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:07,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:53:07,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:53:07,085 INFO L87 Difference]: Start difference. First operand 1670 states and 5785 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:08,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:08,833 INFO L93 Difference]: Finished difference Result 2329 states and 7648 transitions. [2021-06-05 04:53:08,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 04:53:08,833 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:53:08,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:08,836 INFO L225 Difference]: With dead ends: 2329 [2021-06-05 04:53:08,837 INFO L226 Difference]: Without dead ends: 2138 [2021-06-05 04:53:08,837 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 1421.6ms TimeCoverageRelationStatistics Valid=309, Invalid=2447, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 04:53:08,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2138 states. [2021-06-05 04:53:08,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2138 to 1693. [2021-06-05 04:53:08,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1693 states, 1692 states have (on average 3.4680851063829787) internal successors, (5868), 1692 states have internal predecessors, (5868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:08,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1693 states to 1693 states and 5868 transitions. [2021-06-05 04:53:08,855 INFO L78 Accepts]: Start accepts. Automaton has 1693 states and 5868 transitions. Word has length 24 [2021-06-05 04:53:08,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:08,856 INFO L482 AbstractCegarLoop]: Abstraction has 1693 states and 5868 transitions. [2021-06-05 04:53:08,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:08,856 INFO L276 IsEmpty]: Start isEmpty. Operand 1693 states and 5868 transitions. [2021-06-05 04:53:08,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:53:08,858 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:08,858 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:53:09,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6816 [2021-06-05 04:53:09,058 INFO L430 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:09,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:09,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1695049814, now seen corresponding path program 309 times [2021-06-05 04:53:09,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:09,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570400361] [2021-06-05 04:53:09,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:09,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:09,218 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:53:09,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:09,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570400361] [2021-06-05 04:53:09,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570400361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:09,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191609363] [2021-06-05 04:53:09,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:09,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:53:09,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:09,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 04:53:09,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:09,545 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:53:09,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191609363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:09,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:09,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-06-05 04:53:09,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701652993] [2021-06-05 04:53:09,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:53:09,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:09,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:53:09,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:53:09,546 INFO L87 Difference]: Start difference. First operand 1693 states and 5868 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:12,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:12,323 INFO L93 Difference]: Finished difference Result 2838 states and 9112 transitions. [2021-06-05 04:53:12,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 04:53:12,323 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:53:12,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:12,327 INFO L225 Difference]: With dead ends: 2838 [2021-06-05 04:53:12,327 INFO L226 Difference]: Without dead ends: 2628 [2021-06-05 04:53:12,327 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1009 ImplicationChecksByTransitivity, 2364.4ms TimeCoverageRelationStatistics Valid=471, Invalid=3435, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 04:53:12,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2628 states. [2021-06-05 04:53:12,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2628 to 1719. [2021-06-05 04:53:12,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1719 states, 1718 states have (on average 3.470896391152503) internal successors, (5963), 1718 states have internal predecessors, (5963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:12,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1719 states to 1719 states and 5963 transitions. [2021-06-05 04:53:12,348 INFO L78 Accepts]: Start accepts. Automaton has 1719 states and 5963 transitions. Word has length 24 [2021-06-05 04:53:12,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:12,349 INFO L482 AbstractCegarLoop]: Abstraction has 1719 states and 5963 transitions. [2021-06-05 04:53:12,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:12,349 INFO L276 IsEmpty]: Start isEmpty. Operand 1719 states and 5963 transitions. [2021-06-05 04:53:12,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:53:12,351 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:12,351 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:53:12,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6822,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:12,551 INFO L430 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:12,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:12,551 INFO L82 PathProgramCache]: Analyzing trace with hash 887134254, now seen corresponding path program 310 times [2021-06-05 04:53:12,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:12,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877414520] [2021-06-05 04:53:12,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:12,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:12,687 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:53:12,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:12,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877414520] [2021-06-05 04:53:12,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877414520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:12,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326707353] [2021-06-05 04:53:12,687 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:12,800 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:53:12,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:12,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 04:53:12,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:13,008 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:53:13,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326707353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:13,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:13,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-06-05 04:53:13,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595253223] [2021-06-05 04:53:13,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:53:13,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:13,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:53:13,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:53:13,008 INFO L87 Difference]: Start difference. First operand 1719 states and 5963 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:14,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:14,695 INFO L93 Difference]: Finished difference Result 2452 states and 8102 transitions. [2021-06-05 04:53:14,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 04:53:14,695 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:53:14,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:14,699 INFO L225 Difference]: With dead ends: 2452 [2021-06-05 04:53:14,699 INFO L226 Difference]: Without dead ends: 2337 [2021-06-05 04:53:14,699 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 1358.4ms TimeCoverageRelationStatistics Valid=336, Invalid=2420, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 04:53:14,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2337 states. [2021-06-05 04:53:14,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2337 to 1751. [2021-06-05 04:53:14,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1751 states, 1750 states have (on average 3.4977142857142858) internal successors, (6121), 1750 states have internal predecessors, (6121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:14,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1751 states to 1751 states and 6121 transitions. [2021-06-05 04:53:14,720 INFO L78 Accepts]: Start accepts. Automaton has 1751 states and 6121 transitions. Word has length 24 [2021-06-05 04:53:14,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:14,720 INFO L482 AbstractCegarLoop]: Abstraction has 1751 states and 6121 transitions. [2021-06-05 04:53:14,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:14,720 INFO L276 IsEmpty]: Start isEmpty. Operand 1751 states and 6121 transitions. [2021-06-05 04:53:14,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:53:14,722 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:14,722 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:53:14,922 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6830,312 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:14,923 INFO L430 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:14,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:14,923 INFO L82 PathProgramCache]: Analyzing trace with hash -660978942, now seen corresponding path program 311 times [2021-06-05 04:53:14,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:14,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957772153] [2021-06-05 04:53:14,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:14,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:15,077 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:53:15,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:15,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957772153] [2021-06-05 04:53:15,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957772153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:15,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401882206] [2021-06-05 04:53:15,077 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:15,191 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:53:15,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:15,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 04:53:15,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:15,420 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:15,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401882206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:15,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:15,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2021-06-05 04:53:15,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631099414] [2021-06-05 04:53:15,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:53:15,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:15,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:53:15,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=374, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:53:15,420 INFO L87 Difference]: Start difference. First operand 1751 states and 6121 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:17,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:17,667 INFO L93 Difference]: Finished difference Result 2641 states and 8576 transitions. [2021-06-05 04:53:17,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 04:53:17,668 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:53:17,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:17,671 INFO L225 Difference]: With dead ends: 2641 [2021-06-05 04:53:17,671 INFO L226 Difference]: Without dead ends: 2503 [2021-06-05 04:53:17,671 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 855 ImplicationChecksByTransitivity, 1784.2ms TimeCoverageRelationStatistics Valid=406, Invalid=3134, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 04:53:17,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2503 states. [2021-06-05 04:53:17,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2503 to 1670. [2021-06-05 04:53:17,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1670 states, 1669 states have (on average 3.4661473936488916) internal successors, (5785), 1669 states have internal predecessors, (5785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:17,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1670 states to 1670 states and 5785 transitions. [2021-06-05 04:53:17,692 INFO L78 Accepts]: Start accepts. Automaton has 1670 states and 5785 transitions. Word has length 24 [2021-06-05 04:53:17,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:17,692 INFO L482 AbstractCegarLoop]: Abstraction has 1670 states and 5785 transitions. [2021-06-05 04:53:17,692 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:17,692 INFO L276 IsEmpty]: Start isEmpty. Operand 1670 states and 5785 transitions. [2021-06-05 04:53:17,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:53:17,694 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:17,694 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:53:17,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6838,313 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:17,894 INFO L430 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:17,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:17,895 INFO L82 PathProgramCache]: Analyzing trace with hash 848323318, now seen corresponding path program 312 times [2021-06-05 04:53:17,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:17,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058025740] [2021-06-05 04:53:17,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:17,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:18,017 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:53:18,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:18,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058025740] [2021-06-05 04:53:18,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058025740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:18,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696877850] [2021-06-05 04:53:18,017 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:18,130 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:53:18,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:18,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 04:53:18,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:18,335 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:53:18,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696877850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:18,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:18,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 04:53:18,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445705183] [2021-06-05 04:53:18,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:53:18,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:18,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:53:18,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:53:18,336 INFO L87 Difference]: Start difference. First operand 1670 states and 5785 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:20,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:20,443 INFO L93 Difference]: Finished difference Result 2977 states and 9542 transitions. [2021-06-05 04:53:20,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 04:53:20,444 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:53:20,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:20,448 INFO L225 Difference]: With dead ends: 2977 [2021-06-05 04:53:20,448 INFO L226 Difference]: Without dead ends: 2740 [2021-06-05 04:53:20,448 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 1706.6ms TimeCoverageRelationStatistics Valid=367, Invalid=2939, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 04:53:20,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2740 states. [2021-06-05 04:53:20,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2740 to 1677. [2021-06-05 04:53:20,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1677 states, 1676 states have (on average 3.4665871121718377) internal successors, (5810), 1676 states have internal predecessors, (5810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:20,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1677 states to 1677 states and 5810 transitions. [2021-06-05 04:53:20,481 INFO L78 Accepts]: Start accepts. Automaton has 1677 states and 5810 transitions. Word has length 24 [2021-06-05 04:53:20,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:20,481 INFO L482 AbstractCegarLoop]: Abstraction has 1677 states and 5810 transitions. [2021-06-05 04:53:20,481 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:20,481 INFO L276 IsEmpty]: Start isEmpty. Operand 1677 states and 5810 transitions. [2021-06-05 04:53:20,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:53:20,483 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:20,483 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:53:20,683 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6846 [2021-06-05 04:53:20,684 INFO L430 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:20,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:20,684 INFO L82 PathProgramCache]: Analyzing trace with hash -864459910, now seen corresponding path program 313 times [2021-06-05 04:53:20,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:20,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799576768] [2021-06-05 04:53:20,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:20,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:20,788 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:53:20,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:20,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799576768] [2021-06-05 04:53:20,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799576768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:20,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784570633] [2021-06-05 04:53:20,788 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:20,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:20,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 04:53:20,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:21,087 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:53:21,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784570633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:21,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:21,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 04:53:21,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395235624] [2021-06-05 04:53:21,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:53:21,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:21,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:53:21,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:53:21,088 INFO L87 Difference]: Start difference. First operand 1677 states and 5810 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:22,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:22,598 INFO L93 Difference]: Finished difference Result 2771 states and 9108 transitions. [2021-06-05 04:53:22,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 04:53:22,598 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:53:22,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:22,602 INFO L225 Difference]: With dead ends: 2771 [2021-06-05 04:53:22,602 INFO L226 Difference]: Without dead ends: 2606 [2021-06-05 04:53:22,603 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 995.9ms TimeCoverageRelationStatistics Valid=305, Invalid=2347, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 04:53:22,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2606 states. [2021-06-05 04:53:22,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2606 to 1683. [2021-06-05 04:53:22,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1683 states, 1682 states have (on average 3.4863258026159336) internal successors, (5864), 1682 states have internal predecessors, (5864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:22,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1683 states to 1683 states and 5864 transitions. [2021-06-05 04:53:22,625 INFO L78 Accepts]: Start accepts. Automaton has 1683 states and 5864 transitions. Word has length 24 [2021-06-05 04:53:22,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:22,625 INFO L482 AbstractCegarLoop]: Abstraction has 1683 states and 5864 transitions. [2021-06-05 04:53:22,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:22,625 INFO L276 IsEmpty]: Start isEmpty. Operand 1683 states and 5864 transitions. [2021-06-05 04:53:22,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:53:22,627 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:22,627 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:53:22,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6854,315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:22,828 INFO L430 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:22,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:22,828 INFO L82 PathProgramCache]: Analyzing trace with hash -1186831674, now seen corresponding path program 314 times [2021-06-05 04:53:22,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:22,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309994836] [2021-06-05 04:53:22,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:22,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:22,907 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:22,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:22,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309994836] [2021-06-05 04:53:22,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309994836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:22,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271676788] [2021-06-05 04:53:22,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:23,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:53:23,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:23,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:53:23,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:23,258 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:23,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271676788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:23,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:23,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:53:23,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670867608] [2021-06-05 04:53:23,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:53:23,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:23,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:53:23,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:53:23,259 INFO L87 Difference]: Start difference. First operand 1683 states and 5864 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:23,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:23,469 INFO L93 Difference]: Finished difference Result 1907 states and 6473 transitions. [2021-06-05 04:53:23,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:53:23,469 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:53:23,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:23,471 INFO L225 Difference]: With dead ends: 1907 [2021-06-05 04:53:23,471 INFO L226 Difference]: Without dead ends: 1832 [2021-06-05 04:53:23,472 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 288.2ms TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:53:23,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1832 states. [2021-06-05 04:53:23,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1832 to 1627. [2021-06-05 04:53:23,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1627 states, 1626 states have (on average 3.458179581795818) internal successors, (5623), 1626 states have internal predecessors, (5623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:23,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1627 states to 1627 states and 5623 transitions. [2021-06-05 04:53:23,488 INFO L78 Accepts]: Start accepts. Automaton has 1627 states and 5623 transitions. Word has length 24 [2021-06-05 04:53:23,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:23,488 INFO L482 AbstractCegarLoop]: Abstraction has 1627 states and 5623 transitions. [2021-06-05 04:53:23,488 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:23,488 INFO L276 IsEmpty]: Start isEmpty. Operand 1627 states and 5623 transitions. [2021-06-05 04:53:23,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:53:23,490 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:23,490 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:53:23,690 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 316 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6862 [2021-06-05 04:53:23,691 INFO L430 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:23,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:23,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1721159154, now seen corresponding path program 315 times [2021-06-05 04:53:23,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:23,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712843384] [2021-06-05 04:53:23,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:23,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:23,823 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:23,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:23,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712843384] [2021-06-05 04:53:23,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712843384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:23,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124022007] [2021-06-05 04:53:23,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:23,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:53:23,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:23,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:53:23,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:24,163 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:53:24,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124022007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:24,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:24,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-06-05 04:53:24,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948109210] [2021-06-05 04:53:24,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:53:24,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:24,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:53:24,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:53:24,164 INFO L87 Difference]: Start difference. First operand 1627 states and 5623 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:26,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:26,898 INFO L93 Difference]: Finished difference Result 2439 states and 7890 transitions. [2021-06-05 04:53:26,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 04:53:26,898 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:53:26,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:26,902 INFO L225 Difference]: With dead ends: 2439 [2021-06-05 04:53:26,902 INFO L226 Difference]: Without dead ends: 2225 [2021-06-05 04:53:26,902 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1249 ImplicationChecksByTransitivity, 2395.7ms TimeCoverageRelationStatistics Valid=715, Invalid=4115, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 04:53:26,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2225 states. [2021-06-05 04:53:26,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2225 to 1621. [2021-06-05 04:53:26,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1621 states, 1620 states have (on average 3.45) internal successors, (5589), 1620 states have internal predecessors, (5589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:26,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1621 states to 1621 states and 5589 transitions. [2021-06-05 04:53:26,921 INFO L78 Accepts]: Start accepts. Automaton has 1621 states and 5589 transitions. Word has length 24 [2021-06-05 04:53:26,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:26,922 INFO L482 AbstractCegarLoop]: Abstraction has 1621 states and 5589 transitions. [2021-06-05 04:53:26,922 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:26,922 INFO L276 IsEmpty]: Start isEmpty. Operand 1621 states and 5589 transitions. [2021-06-05 04:53:26,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:53:26,923 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:26,923 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:53:27,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6887,317 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:27,124 INFO L430 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:27,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:27,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1073438964, now seen corresponding path program 316 times [2021-06-05 04:53:27,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:27,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10783262] [2021-06-05 04:53:27,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:27,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:27,212 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:27,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:27,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10783262] [2021-06-05 04:53:27,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10783262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:27,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532245290] [2021-06-05 04:53:27,212 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:27,338 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:53:27,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:27,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:53:27,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:27,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:27,369 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:27,390 INFO L628 ElimStorePlain]: treesize reduction 17, result has 54.1 percent of original size [2021-06-05 04:53:27,390 INFO L518 ElimStorePlain]: Eliminatee v_prenex_261 vanished before elimination [2021-06-05 04:53:27,390 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:53:27,391 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:20 [2021-06-05 04:53:27,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:27,438 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:27,439 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:53:27,440 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:27,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:27,443 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:27,460 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:27,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:53:27,463 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:27,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:27,465 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:27,491 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.0 percent of original size [2021-06-05 04:53:27,492 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:53:27,492 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:75, output treesize:19 [2021-06-05 04:53:27,536 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:53:27,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532245290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:27,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:27,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 15 [2021-06-05 04:53:27,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468425488] [2021-06-05 04:53:27,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:53:27,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:27,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:53:27,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:53:27,536 INFO L87 Difference]: Start difference. First operand 1621 states and 5589 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:28,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:28,113 INFO L93 Difference]: Finished difference Result 1957 states and 6615 transitions. [2021-06-05 04:53:28,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 04:53:28,113 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:53:28,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:28,116 INFO L225 Difference]: With dead ends: 1957 [2021-06-05 04:53:28,116 INFO L226 Difference]: Without dead ends: 1888 [2021-06-05 04:53:28,116 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 375.0ms TimeCoverageRelationStatistics Valid=155, Invalid=901, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:53:28,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1888 states. [2021-06-05 04:53:28,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1888 to 1651. [2021-06-05 04:53:28,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1651 states, 1650 states have (on average 3.4593939393939395) internal successors, (5708), 1650 states have internal predecessors, (5708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:28,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1651 states to 1651 states and 5708 transitions. [2021-06-05 04:53:28,133 INFO L78 Accepts]: Start accepts. Automaton has 1651 states and 5708 transitions. Word has length 24 [2021-06-05 04:53:28,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:28,133 INFO L482 AbstractCegarLoop]: Abstraction has 1651 states and 5708 transitions. [2021-06-05 04:53:28,133 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:28,133 INFO L276 IsEmpty]: Start isEmpty. Operand 1651 states and 5708 transitions. [2021-06-05 04:53:28,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:53:28,135 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:28,135 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:53:28,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6899,318 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:28,336 INFO L430 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:28,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:28,336 INFO L82 PathProgramCache]: Analyzing trace with hash -2046037688, now seen corresponding path program 317 times [2021-06-05 04:53:28,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:28,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905629537] [2021-06-05 04:53:28,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:28,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:28,426 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:28,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:28,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905629537] [2021-06-05 04:53:28,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905629537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:28,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146547292] [2021-06-05 04:53:28,427 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:28,540 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:53:28,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:28,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:53:28,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:28,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:28,570 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:28,591 INFO L628 ElimStorePlain]: treesize reduction 17, result has 54.1 percent of original size [2021-06-05 04:53:28,591 INFO L518 ElimStorePlain]: Eliminatee v_prenex_262 vanished before elimination [2021-06-05 04:53:28,592 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:53:28,592 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:20 [2021-06-05 04:53:28,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:53:28,706 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:28,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:28,710 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:28,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:53:28,713 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:28,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:28,717 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:28,719 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:53:28,720 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:28,722 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:53:28,722 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:28,812 INFO L628 ElimStorePlain]: treesize reduction 43, result has 67.4 percent of original size [2021-06-05 04:53:28,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:53:28,816 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:28,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:53:28,819 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:28,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:28,822 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:28,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:28,825 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:28,882 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.3 percent of original size [2021-06-05 04:53:28,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:28,886 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:28,924 INFO L628 ElimStorePlain]: treesize reduction 19, result has 72.5 percent of original size [2021-06-05 04:53:28,924 INFO L518 ElimStorePlain]: Eliminatee v_prenex_263 vanished before elimination [2021-06-05 04:53:28,925 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:53:28,925 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:201, output treesize:34 [2021-06-05 04:53:28,998 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:53:28,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146547292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:28,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:28,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-05 04:53:28,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329036009] [2021-06-05 04:53:28,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:53:28,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:28,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:53:28,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:53:28,998 INFO L87 Difference]: Start difference. First operand 1651 states and 5708 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:29,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:29,551 INFO L93 Difference]: Finished difference Result 2130 states and 7161 transitions. [2021-06-05 04:53:29,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 04:53:29,552 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:53:29,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:29,555 INFO L225 Difference]: With dead ends: 2130 [2021-06-05 04:53:29,555 INFO L226 Difference]: Without dead ends: 2070 [2021-06-05 04:53:29,555 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 421.4ms TimeCoverageRelationStatistics Valid=172, Invalid=950, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 04:53:29,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2070 states. [2021-06-05 04:53:29,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2070 to 1684. [2021-06-05 04:53:29,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1684 states, 1683 states have (on average 3.4878193701723115) internal successors, (5870), 1683 states have internal predecessors, (5870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:29,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1684 states to 1684 states and 5870 transitions. [2021-06-05 04:53:29,573 INFO L78 Accepts]: Start accepts. Automaton has 1684 states and 5870 transitions. Word has length 24 [2021-06-05 04:53:29,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:29,573 INFO L482 AbstractCegarLoop]: Abstraction has 1684 states and 5870 transitions. [2021-06-05 04:53:29,573 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:29,573 INFO L276 IsEmpty]: Start isEmpty. Operand 1684 states and 5870 transitions. [2021-06-05 04:53:29,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:53:29,575 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:29,575 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:53:29,775 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6906 [2021-06-05 04:53:29,775 INFO L430 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:29,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:29,775 INFO L82 PathProgramCache]: Analyzing trace with hash -432470954, now seen corresponding path program 318 times [2021-06-05 04:53:29,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:29,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398604132] [2021-06-05 04:53:29,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:29,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:29,861 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:29,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:29,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398604132] [2021-06-05 04:53:29,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398604132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:29,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143616551] [2021-06-05 04:53:29,861 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:29,974 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:53:29,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:29,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:53:29,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:30,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:30,005 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:30,032 INFO L628 ElimStorePlain]: treesize reduction 2, result has 90.9 percent of original size [2021-06-05 04:53:30,033 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:53:30,033 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:20 [2021-06-05 04:53:30,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:30,157 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:30,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:53:30,161 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:30,163 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:53:30,163 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:30,166 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:53:30,166 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:30,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:30,169 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:30,221 INFO L628 ElimStorePlain]: treesize reduction 24, result has 72.1 percent of original size [2021-06-05 04:53:30,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:30,224 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:30,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:30,227 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:30,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:53:30,230 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:30,268 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.0 percent of original size [2021-06-05 04:53:30,268 INFO L518 ElimStorePlain]: Eliminatee ends_with_10 vanished before elimination [2021-06-05 04:53:30,269 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:53:30,269 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 4 variables, input treesize:146, output treesize:34 [2021-06-05 04:53:30,343 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:53:30,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143616551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:30,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:30,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 15 [2021-06-05 04:53:30,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045128275] [2021-06-05 04:53:30,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:53:30,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:30,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:53:30,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:53:30,344 INFO L87 Difference]: Start difference. First operand 1684 states and 5870 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:31,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:31,057 INFO L93 Difference]: Finished difference Result 2020 states and 6804 transitions. [2021-06-05 04:53:31,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 04:53:31,058 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:53:31,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:31,061 INFO L225 Difference]: With dead ends: 2020 [2021-06-05 04:53:31,061 INFO L226 Difference]: Without dead ends: 1953 [2021-06-05 04:53:31,061 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 498.7ms TimeCoverageRelationStatistics Valid=178, Invalid=1082, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 04:53:31,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1953 states. [2021-06-05 04:53:31,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1953 to 1623. [2021-06-05 04:53:31,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1623 states, 1622 states have (on average 3.4494451294697903) internal successors, (5595), 1622 states have internal predecessors, (5595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:31,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1623 states to 1623 states and 5595 transitions. [2021-06-05 04:53:31,078 INFO L78 Accepts]: Start accepts. Automaton has 1623 states and 5595 transitions. Word has length 24 [2021-06-05 04:53:31,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:31,078 INFO L482 AbstractCegarLoop]: Abstraction has 1623 states and 5595 transitions. [2021-06-05 04:53:31,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:31,078 INFO L276 IsEmpty]: Start isEmpty. Operand 1623 states and 5595 transitions. [2021-06-05 04:53:31,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:53:31,080 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:31,080 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:53:31,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6936,320 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:31,281 INFO L430 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:31,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:31,281 INFO L82 PathProgramCache]: Analyzing trace with hash 34433908, now seen corresponding path program 319 times [2021-06-05 04:53:31,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:31,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17794196] [2021-06-05 04:53:31,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:31,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:31,427 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:31,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:31,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17794196] [2021-06-05 04:53:31,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17794196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:31,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096504419] [2021-06-05 04:53:31,427 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:31,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:31,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:53:31,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:31,728 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:53:31,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096504419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:31,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:31,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-06-05 04:53:31,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964597713] [2021-06-05 04:53:31,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:53:31,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:31,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:53:31,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:53:31,729 INFO L87 Difference]: Start difference. First operand 1623 states and 5595 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:34,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:34,078 INFO L93 Difference]: Finished difference Result 2438 states and 7938 transitions. [2021-06-05 04:53:34,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 04:53:34,078 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:53:34,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:34,081 INFO L225 Difference]: With dead ends: 2438 [2021-06-05 04:53:34,081 INFO L226 Difference]: Without dead ends: 2254 [2021-06-05 04:53:34,082 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1612 ImplicationChecksByTransitivity, 1881.0ms TimeCoverageRelationStatistics Valid=574, Invalid=4682, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 04:53:34,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2254 states. [2021-06-05 04:53:34,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2254 to 1641. [2021-06-05 04:53:34,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1641 states, 1640 states have (on average 3.479878048780488) internal successors, (5707), 1640 states have internal predecessors, (5707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:34,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1641 states to 1641 states and 5707 transitions. [2021-06-05 04:53:34,103 INFO L78 Accepts]: Start accepts. Automaton has 1641 states and 5707 transitions. Word has length 24 [2021-06-05 04:53:34,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:34,103 INFO L482 AbstractCegarLoop]: Abstraction has 1641 states and 5707 transitions. [2021-06-05 04:53:34,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:34,103 INFO L276 IsEmpty]: Start isEmpty. Operand 1641 states and 5707 transitions. [2021-06-05 04:53:34,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:53:34,105 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:34,105 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:53:34,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6965,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:34,305 INFO L430 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:34,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:34,305 INFO L82 PathProgramCache]: Analyzing trace with hash 104543944, now seen corresponding path program 320 times [2021-06-05 04:53:34,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:34,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545798057] [2021-06-05 04:53:34,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:34,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:34,458 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:34,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:34,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545798057] [2021-06-05 04:53:34,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545798057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:34,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276119685] [2021-06-05 04:53:34,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:34,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:53:34,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:34,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:53:34,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:34,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:53:34,617 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:34,675 INFO L628 ElimStorePlain]: treesize reduction 58, result has 55.7 percent of original size [2021-06-05 04:53:34,675 INFO L518 ElimStorePlain]: Eliminatee v_prenex_266 vanished before elimination [2021-06-05 04:53:34,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:53:34,678 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:34,703 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:34,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:53:34,706 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:34,730 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:34,730 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:53:34,731 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:137, output treesize:62 [2021-06-05 04:53:34,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:34,851 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:34,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:34,854 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:34,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:34,857 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:34,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:53:34,860 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:34,928 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.6 percent of original size [2021-06-05 04:53:34,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:34,931 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:34,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:34,934 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:34,985 INFO L628 ElimStorePlain]: treesize reduction 15, result has 79.7 percent of original size [2021-06-05 04:53:34,986 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:53:34,986 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:99, output treesize:43 [2021-06-05 04:53:35,070 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:53:35,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276119685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:35,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:35,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 18 [2021-06-05 04:53:35,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114656601] [2021-06-05 04:53:35,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:53:35,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:35,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:53:35,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:53:35,071 INFO L87 Difference]: Start difference. First operand 1641 states and 5707 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:37,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:37,158 INFO L93 Difference]: Finished difference Result 2328 states and 7668 transitions. [2021-06-05 04:53:37,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 04:53:37,159 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:53:37,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:37,162 INFO L225 Difference]: With dead ends: 2328 [2021-06-05 04:53:37,162 INFO L226 Difference]: Without dead ends: 2208 [2021-06-05 04:53:37,162 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1090 ImplicationChecksByTransitivity, 1650.6ms TimeCoverageRelationStatistics Valid=507, Invalid=3275, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 04:53:37,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2208 states. [2021-06-05 04:53:37,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2208 to 1656. [2021-06-05 04:53:37,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1656 states, 1655 states have (on average 3.4924471299093653) internal successors, (5780), 1655 states have internal predecessors, (5780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:37,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1656 states to 1656 states and 5780 transitions. [2021-06-05 04:53:37,182 INFO L78 Accepts]: Start accepts. Automaton has 1656 states and 5780 transitions. Word has length 24 [2021-06-05 04:53:37,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:37,182 INFO L482 AbstractCegarLoop]: Abstraction has 1656 states and 5780 transitions. [2021-06-05 04:53:37,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:37,183 INFO L276 IsEmpty]: Start isEmpty. Operand 1656 states and 5780 transitions. [2021-06-05 04:53:37,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:53:37,184 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:37,184 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:53:37,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6974,322 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:37,385 INFO L430 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:37,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:37,385 INFO L82 PathProgramCache]: Analyzing trace with hash 353509398, now seen corresponding path program 321 times [2021-06-05 04:53:37,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:37,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694339420] [2021-06-05 04:53:37,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:37,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:37,575 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:37,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:37,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694339420] [2021-06-05 04:53:37,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694339420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:37,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669939643] [2021-06-05 04:53:37,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:37,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:53:37,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:37,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:53:37,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:37,900 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:53:37,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669939643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:37,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:37,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-06-05 04:53:37,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008006431] [2021-06-05 04:53:37,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:53:37,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:37,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:53:37,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:53:37,901 INFO L87 Difference]: Start difference. First operand 1656 states and 5780 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:39,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:39,891 INFO L93 Difference]: Finished difference Result 2232 states and 7426 transitions. [2021-06-05 04:53:39,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 04:53:39,891 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:53:39,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:39,894 INFO L225 Difference]: With dead ends: 2232 [2021-06-05 04:53:39,894 INFO L226 Difference]: Without dead ends: 2058 [2021-06-05 04:53:39,895 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1064 ImplicationChecksByTransitivity, 1575.9ms TimeCoverageRelationStatistics Valid=372, Invalid=3410, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 04:53:39,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2058 states. [2021-06-05 04:53:39,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2058 to 1654. [2021-06-05 04:53:39,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1654 states, 1653 states have (on average 3.4827586206896552) internal successors, (5757), 1653 states have internal predecessors, (5757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:39,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1654 states to 1654 states and 5757 transitions. [2021-06-05 04:53:39,913 INFO L78 Accepts]: Start accepts. Automaton has 1654 states and 5757 transitions. Word has length 24 [2021-06-05 04:53:39,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:39,913 INFO L482 AbstractCegarLoop]: Abstraction has 1654 states and 5757 transitions. [2021-06-05 04:53:39,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:39,913 INFO L276 IsEmpty]: Start isEmpty. Operand 1654 states and 5757 transitions. [2021-06-05 04:53:39,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:53:39,915 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:39,915 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:53:40,115 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6985,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:40,115 INFO L430 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:40,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:40,115 INFO L82 PathProgramCache]: Analyzing trace with hash 643781646, now seen corresponding path program 322 times [2021-06-05 04:53:40,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:40,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096240491] [2021-06-05 04:53:40,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:40,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:40,197 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:40,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:40,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096240491] [2021-06-05 04:53:40,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096240491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:40,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721759532] [2021-06-05 04:53:40,197 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:40,311 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:53:40,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:40,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:53:40,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:40,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:40,370 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:40,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:40,372 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:40,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:40,375 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:40,411 INFO L628 ElimStorePlain]: treesize reduction 23, result has 63.5 percent of original size [2021-06-05 04:53:40,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:53:40,413 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:40,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:40,416 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:40,441 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.0 percent of original size [2021-06-05 04:53:40,442 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:53:40,442 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:75, output treesize:19 [2021-06-05 04:53:40,486 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:53:40,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721759532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:40,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:40,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 14 [2021-06-05 04:53:40,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560143274] [2021-06-05 04:53:40,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:53:40,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:40,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:53:40,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:53:40,487 INFO L87 Difference]: Start difference. First operand 1654 states and 5757 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:41,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:41,169 INFO L93 Difference]: Finished difference Result 1923 states and 6557 transitions. [2021-06-05 04:53:41,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 04:53:41,169 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:53:41,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:41,172 INFO L225 Difference]: With dead ends: 1923 [2021-06-05 04:53:41,172 INFO L226 Difference]: Without dead ends: 1845 [2021-06-05 04:53:41,172 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 540.8ms TimeCoverageRelationStatistics Valid=219, Invalid=1041, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 04:53:41,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1845 states. [2021-06-05 04:53:41,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1845 to 1635. [2021-06-05 04:53:41,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1635 states, 1634 states have (on average 3.4871481028151776) internal successors, (5698), 1634 states have internal predecessors, (5698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:41,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1635 states to 1635 states and 5698 transitions. [2021-06-05 04:53:41,189 INFO L78 Accepts]: Start accepts. Automaton has 1635 states and 5698 transitions. Word has length 24 [2021-06-05 04:53:41,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:41,189 INFO L482 AbstractCegarLoop]: Abstraction has 1635 states and 5698 transitions. [2021-06-05 04:53:41,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:41,189 INFO L276 IsEmpty]: Start isEmpty. Operand 1635 states and 5698 transitions. [2021-06-05 04:53:41,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:53:41,191 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:41,191 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:53:41,391 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6994 [2021-06-05 04:53:41,392 INFO L430 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:41,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:41,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1570714054, now seen corresponding path program 323 times [2021-06-05 04:53:41,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:41,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000244367] [2021-06-05 04:53:41,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:41,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:41,485 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:41,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:41,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000244367] [2021-06-05 04:53:41,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000244367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:41,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632260734] [2021-06-05 04:53:41,485 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:41,600 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:53:41,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:41,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:53:41,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:41,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:41,675 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:41,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:41,677 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:41,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:41,680 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:41,717 INFO L628 ElimStorePlain]: treesize reduction 23, result has 63.5 percent of original size [2021-06-05 04:53:41,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:53:41,719 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:41,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:41,722 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:41,748 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.0 percent of original size [2021-06-05 04:53:41,749 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:53:41,749 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:75, output treesize:19 [2021-06-05 04:53:41,792 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:53:41,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632260734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:41,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:41,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 15 [2021-06-05 04:53:41,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754279073] [2021-06-05 04:53:41,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:53:41,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:41,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:53:41,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:53:41,793 INFO L87 Difference]: Start difference. First operand 1635 states and 5698 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:42,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:42,511 INFO L93 Difference]: Finished difference Result 2066 states and 7013 transitions. [2021-06-05 04:53:42,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 04:53:42,511 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:53:42,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:42,514 INFO L225 Difference]: With dead ends: 2066 [2021-06-05 04:53:42,514 INFO L226 Difference]: Without dead ends: 1997 [2021-06-05 04:53:42,514 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 507.3ms TimeCoverageRelationStatistics Valid=201, Invalid=1059, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 04:53:42,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1997 states. [2021-06-05 04:53:42,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1997 to 1662. [2021-06-05 04:53:42,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1662 states, 1661 states have (on average 3.4942805538832027) internal successors, (5804), 1661 states have internal predecessors, (5804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:42,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1662 states to 1662 states and 5804 transitions. [2021-06-05 04:53:42,532 INFO L78 Accepts]: Start accepts. Automaton has 1662 states and 5804 transitions. Word has length 24 [2021-06-05 04:53:42,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:42,532 INFO L482 AbstractCegarLoop]: Abstraction has 1662 states and 5804 transitions. [2021-06-05 04:53:42,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:42,532 INFO L276 IsEmpty]: Start isEmpty. Operand 1662 states and 5804 transitions. [2021-06-05 04:53:42,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:53:42,534 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:42,534 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:53:42,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7000,325 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:42,739 INFO L430 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:42,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:42,739 INFO L82 PathProgramCache]: Analyzing trace with hash -395223410, now seen corresponding path program 324 times [2021-06-05 04:53:42,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:42,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292531694] [2021-06-05 04:53:42,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:42,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:42,829 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:42,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:42,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292531694] [2021-06-05 04:53:42,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292531694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:42,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581403368] [2021-06-05 04:53:42,829 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:42,947 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:53:42,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:42,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:53:42,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:43,075 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:53:43,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581403368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:43,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:43,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-05 04:53:43,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207198174] [2021-06-05 04:53:43,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:53:43,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:43,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:53:43,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:53:43,076 INFO L87 Difference]: Start difference. First operand 1662 states and 5804 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:43,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:43,727 INFO L93 Difference]: Finished difference Result 2132 states and 7230 transitions. [2021-06-05 04:53:43,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 04:53:43,728 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:53:43,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:43,730 INFO L225 Difference]: With dead ends: 2132 [2021-06-05 04:53:43,730 INFO L226 Difference]: Without dead ends: 2072 [2021-06-05 04:53:43,731 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 478.0ms TimeCoverageRelationStatistics Valid=247, Invalid=1085, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 04:53:43,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2072 states. [2021-06-05 04:53:43,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2072 to 1695. [2021-06-05 04:53:43,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1695 states, 1694 states have (on average 3.52125147579693) internal successors, (5965), 1694 states have internal predecessors, (5965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:43,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1695 states to 1695 states and 5965 transitions. [2021-06-05 04:53:43,749 INFO L78 Accepts]: Start accepts. Automaton has 1695 states and 5965 transitions. Word has length 24 [2021-06-05 04:53:43,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:43,749 INFO L482 AbstractCegarLoop]: Abstraction has 1695 states and 5965 transitions. [2021-06-05 04:53:43,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:43,749 INFO L276 IsEmpty]: Start isEmpty. Operand 1695 states and 5965 transitions. [2021-06-05 04:53:43,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:53:43,751 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:43,751 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:53:43,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7007 [2021-06-05 04:53:43,952 INFO L430 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:43,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:43,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1218343324, now seen corresponding path program 325 times [2021-06-05 04:53:43,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:43,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539806254] [2021-06-05 04:53:43,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:43,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:44,039 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:44,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:44,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539806254] [2021-06-05 04:53:44,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539806254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:44,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541420500] [2021-06-05 04:53:44,039 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:44,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:44,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:53:44,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:44,266 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:53:44,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541420500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:44,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:44,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-05 04:53:44,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249469485] [2021-06-05 04:53:44,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:53:44,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:44,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:53:44,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:53:44,267 INFO L87 Difference]: Start difference. First operand 1695 states and 5965 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:44,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:44,946 INFO L93 Difference]: Finished difference Result 1988 states and 6783 transitions. [2021-06-05 04:53:44,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 04:53:44,946 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:53:44,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:44,949 INFO L225 Difference]: With dead ends: 1988 [2021-06-05 04:53:44,949 INFO L226 Difference]: Without dead ends: 1919 [2021-06-05 04:53:44,949 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 414.4ms TimeCoverageRelationStatistics Valid=169, Invalid=1021, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 04:53:44,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1919 states. [2021-06-05 04:53:44,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1919 to 1622. [2021-06-05 04:53:44,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1622 states, 1621 states have (on average 3.4818013571869217) internal successors, (5644), 1621 states have internal predecessors, (5644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:44,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1622 states to 1622 states and 5644 transitions. [2021-06-05 04:53:44,966 INFO L78 Accepts]: Start accepts. Automaton has 1622 states and 5644 transitions. Word has length 24 [2021-06-05 04:53:44,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:44,966 INFO L482 AbstractCegarLoop]: Abstraction has 1622 states and 5644 transitions. [2021-06-05 04:53:44,966 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:44,966 INFO L276 IsEmpty]: Start isEmpty. Operand 1622 states and 5644 transitions. [2021-06-05 04:53:44,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:53:44,968 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:44,968 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:53:45,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 327 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7016 [2021-06-05 04:53:45,168 INFO L430 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:45,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:45,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1500604018, now seen corresponding path program 326 times [2021-06-05 04:53:45,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:45,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937963517] [2021-06-05 04:53:45,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:45,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:45,252 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:45,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:45,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937963517] [2021-06-05 04:53:45,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937963517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:45,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596691003] [2021-06-05 04:53:45,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:45,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:53:45,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:45,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:53:45,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:45,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:45,405 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:45,425 INFO L628 ElimStorePlain]: treesize reduction 2, result has 90.9 percent of original size [2021-06-05 04:53:45,425 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:53:45,425 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:20 [2021-06-05 04:53:45,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:45,465 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:45,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:45,468 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:45,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:45,471 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:45,507 INFO L628 ElimStorePlain]: treesize reduction 23, result has 63.5 percent of original size [2021-06-05 04:53:45,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:53:45,510 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:45,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:45,513 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:45,539 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.0 percent of original size [2021-06-05 04:53:45,540 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:53:45,540 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:75, output treesize:19 [2021-06-05 04:53:45,585 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:53:45,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596691003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:45,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:45,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 15 [2021-06-05 04:53:45,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441967329] [2021-06-05 04:53:45,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:53:45,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:45,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:53:45,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:53:45,586 INFO L87 Difference]: Start difference. First operand 1622 states and 5644 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:46,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:46,278 INFO L93 Difference]: Finished difference Result 1893 states and 6482 transitions. [2021-06-05 04:53:46,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 04:53:46,278 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:53:46,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:46,281 INFO L225 Difference]: With dead ends: 1893 [2021-06-05 04:53:46,281 INFO L226 Difference]: Without dead ends: 1824 [2021-06-05 04:53:46,281 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 479.3ms TimeCoverageRelationStatistics Valid=179, Invalid=1011, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 04:53:46,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1824 states. [2021-06-05 04:53:46,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1824 to 1651. [2021-06-05 04:53:46,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1651 states, 1650 states have (on average 3.4903030303030302) internal successors, (5759), 1650 states have internal predecessors, (5759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:46,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1651 states to 1651 states and 5759 transitions. [2021-06-05 04:53:46,298 INFO L78 Accepts]: Start accepts. Automaton has 1651 states and 5759 transitions. Word has length 24 [2021-06-05 04:53:46,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:46,298 INFO L482 AbstractCegarLoop]: Abstraction has 1651 states and 5759 transitions. [2021-06-05 04:53:46,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:46,299 INFO L276 IsEmpty]: Start isEmpty. Operand 1651 states and 5759 transitions. [2021-06-05 04:53:46,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:53:46,300 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:46,300 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:53:46,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7025,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:46,501 INFO L430 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:46,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:46,501 INFO L82 PathProgramCache]: Analyzing trace with hash -325113374, now seen corresponding path program 327 times [2021-06-05 04:53:46,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:46,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903684941] [2021-06-05 04:53:46,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:46,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:46,594 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:46,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:46,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903684941] [2021-06-05 04:53:46,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903684941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:46,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149713826] [2021-06-05 04:53:46,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:46,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:53:46,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:46,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:53:46,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:46,750 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:53:46,751 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:46,773 INFO L628 ElimStorePlain]: treesize reduction 2, result has 92.3 percent of original size [2021-06-05 04:53:46,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:46,776 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:46,785 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:46,785 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:53:46,785 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:41, output treesize:20 [2021-06-05 04:53:46,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:46,965 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:46,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:46,969 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:46,973 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:53:46,974 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:46,977 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:53:46,978 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:46,981 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:53:46,981 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:46,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:53:46,986 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:46,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:53:46,991 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:46,994 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:53:46,994 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:47,074 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.8 percent of original size [2021-06-05 04:53:47,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:53:47,078 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:47,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:47,081 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:47,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:47,084 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:47,125 INFO L628 ElimStorePlain]: treesize reduction 21, result has 70.4 percent of original size [2021-06-05 04:53:47,125 INFO L518 ElimStorePlain]: Eliminatee v_prenex_270 vanished before elimination [2021-06-05 04:53:47,126 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:53:47,126 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:201, output treesize:34 [2021-06-05 04:53:47,199 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:53:47,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149713826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:47,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:47,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-05 04:53:47,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244877300] [2021-06-05 04:53:47,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:53:47,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:47,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:53:47,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:53:47,200 INFO L87 Difference]: Start difference. First operand 1651 states and 5759 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:47,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:47,938 INFO L93 Difference]: Finished difference Result 2065 states and 7023 transitions. [2021-06-05 04:53:47,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 04:53:47,939 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:53:47,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:47,942 INFO L225 Difference]: With dead ends: 2065 [2021-06-05 04:53:47,942 INFO L226 Difference]: Without dead ends: 2005 [2021-06-05 04:53:47,942 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 534.5ms TimeCoverageRelationStatistics Valid=217, Invalid=1043, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 04:53:47,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2005 states. [2021-06-05 04:53:47,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2005 to 1683. [2021-06-05 04:53:47,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1683 states, 1682 states have (on average 3.5172413793103448) internal successors, (5916), 1682 states have internal predecessors, (5916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:47,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1683 states to 1683 states and 5916 transitions. [2021-06-05 04:53:47,961 INFO L78 Accepts]: Start accepts. Automaton has 1683 states and 5916 transitions. Word has length 24 [2021-06-05 04:53:47,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:47,961 INFO L482 AbstractCegarLoop]: Abstraction has 1683 states and 5916 transitions. [2021-06-05 04:53:47,961 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:47,961 INFO L276 IsEmpty]: Start isEmpty. Operand 1683 states and 5916 transitions. [2021-06-05 04:53:47,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:53:47,963 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:47,963 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:53:48,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7032 [2021-06-05 04:53:48,164 INFO L430 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:48,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:48,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1288453360, now seen corresponding path program 328 times [2021-06-05 04:53:48,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:48,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057764787] [2021-06-05 04:53:48,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:48,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:48,250 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:48,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:48,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057764787] [2021-06-05 04:53:48,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057764787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:48,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756767033] [2021-06-05 04:53:48,250 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:48,367 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:53:48,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:48,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:53:48,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:48,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:48,406 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:48,428 INFO L628 ElimStorePlain]: treesize reduction 17, result has 54.1 percent of original size [2021-06-05 04:53:48,428 INFO L518 ElimStorePlain]: Eliminatee v_prenex_271 vanished before elimination [2021-06-05 04:53:48,428 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:53:48,428 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:20 [2021-06-05 04:53:48,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:53:48,546 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:48,654 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2021-06-05 04:53:48,654 INFO L628 ElimStorePlain]: treesize reduction 95, result has 49.7 percent of original size [2021-06-05 04:53:48,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:53:48,658 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:48,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:48,661 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:48,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:48,665 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:48,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:53:48,668 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:48,701 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:48,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:48,705 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:48,762 INFO L628 ElimStorePlain]: treesize reduction 3, result has 96.1 percent of original size [2021-06-05 04:53:48,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:48,766 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:48,807 INFO L628 ElimStorePlain]: treesize reduction 16, result has 76.8 percent of original size [2021-06-05 04:53:48,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:53:48,810 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:48,829 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:48,829 INFO L518 ElimStorePlain]: Eliminatee v_prenex_273 vanished before elimination [2021-06-05 04:53:48,830 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 6 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:53:48,830 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 7 variables, input treesize:192, output treesize:34 [2021-06-05 04:53:48,901 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:53:48,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756767033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:48,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:48,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-05 04:53:48,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127190681] [2021-06-05 04:53:48,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:53:48,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:48,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:53:48,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:53:48,902 INFO L87 Difference]: Start difference. First operand 1683 states and 5916 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:49,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:49,683 INFO L93 Difference]: Finished difference Result 1987 states and 6778 transitions. [2021-06-05 04:53:49,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 04:53:49,683 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:53:49,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:49,686 INFO L225 Difference]: With dead ends: 1987 [2021-06-05 04:53:49,686 INFO L226 Difference]: Without dead ends: 1920 [2021-06-05 04:53:49,686 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 512.4ms TimeCoverageRelationStatistics Valid=180, Invalid=1152, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 04:53:49,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1920 states. [2021-06-05 04:53:49,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1920 to 1620. [2021-06-05 04:53:49,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1620 states, 1619 states have (on average 3.4793082149474985) internal successors, (5633), 1619 states have internal predecessors, (5633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:49,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1620 states to 1620 states and 5633 transitions. [2021-06-05 04:53:49,702 INFO L78 Accepts]: Start accepts. Automaton has 1620 states and 5633 transitions. Word has length 24 [2021-06-05 04:53:49,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:49,702 INFO L482 AbstractCegarLoop]: Abstraction has 1620 states and 5633 transitions. [2021-06-05 04:53:49,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:49,703 INFO L276 IsEmpty]: Start isEmpty. Operand 1620 states and 5633 transitions. [2021-06-05 04:53:49,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:53:49,704 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:49,704 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:53:49,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 330 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7098 [2021-06-05 04:53:49,905 INFO L430 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:49,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:49,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1849886158, now seen corresponding path program 329 times [2021-06-05 04:53:49,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:49,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947596768] [2021-06-05 04:53:49,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:49,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:49,986 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:49,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:49,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947596768] [2021-06-05 04:53:49,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947596768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:49,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18073451] [2021-06-05 04:53:49,987 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:50,102 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:53:50,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:50,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:53:50,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:50,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:50,153 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:50,210 INFO L628 ElimStorePlain]: treesize reduction 48, result has 57.5 percent of original size [2021-06-05 04:53:50,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:50,213 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:50,237 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:50,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:53:50,240 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:50,263 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:50,263 INFO L518 ElimStorePlain]: Eliminatee ends_with_10 vanished before elimination [2021-06-05 04:53:50,264 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:53:50,264 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:117, output treesize:58 [2021-06-05 04:53:50,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:53:50,352 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:50,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:50,355 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:50,370 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:50,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:50,372 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:50,386 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:50,387 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:53:50,387 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:42, output treesize:16 [2021-06-05 04:53:50,419 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:53:50,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18073451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:50,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:50,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-05 04:53:50,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884276908] [2021-06-05 04:53:50,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:53:50,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:50,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:53:50,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:53:50,420 INFO L87 Difference]: Start difference. First operand 1620 states and 5633 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:51,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:51,295 INFO L93 Difference]: Finished difference Result 1842 states and 6264 transitions. [2021-06-05 04:53:51,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 04:53:51,295 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:53:51,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:51,298 INFO L225 Difference]: With dead ends: 1842 [2021-06-05 04:53:51,298 INFO L226 Difference]: Without dead ends: 1767 [2021-06-05 04:53:51,298 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 565.5ms TimeCoverageRelationStatistics Valid=160, Invalid=1100, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 04:53:51,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1767 states. [2021-06-05 04:53:51,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1767 to 1620. [2021-06-05 04:53:51,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1620 states, 1619 states have (on average 3.465101914762199) internal successors, (5610), 1619 states have internal predecessors, (5610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:51,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1620 states to 1620 states and 5610 transitions. [2021-06-05 04:53:51,314 INFO L78 Accepts]: Start accepts. Automaton has 1620 states and 5610 transitions. Word has length 24 [2021-06-05 04:53:51,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:51,314 INFO L482 AbstractCegarLoop]: Abstraction has 1620 states and 5610 transitions. [2021-06-05 04:53:51,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:51,314 INFO L276 IsEmpty]: Start isEmpty. Operand 1620 states and 5610 transitions. [2021-06-05 04:53:51,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:53:51,316 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:51,316 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:53:51,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7128,331 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:51,516 INFO L430 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:51,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:51,517 INFO L82 PathProgramCache]: Analyzing trace with hash 672807098, now seen corresponding path program 330 times [2021-06-05 04:53:51,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:51,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521213338] [2021-06-05 04:53:51,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:51,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:51,605 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:51,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:51,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521213338] [2021-06-05 04:53:51,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521213338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:51,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466537567] [2021-06-05 04:53:51,606 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:51,722 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:53:51,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:51,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:53:51,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:51,755 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:53:51,756 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:51,777 INFO L628 ElimStorePlain]: treesize reduction 2, result has 92.3 percent of original size [2021-06-05 04:53:51,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:51,780 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:51,789 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:51,789 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:53:51,790 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:41, output treesize:20 [2021-06-05 04:53:51,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:51,836 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:51,838 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:53:51,839 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:51,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:51,842 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:51,859 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:51,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:51,862 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:51,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:53:51,865 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:51,891 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.0 percent of original size [2021-06-05 04:53:51,892 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:53:51,892 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:75, output treesize:19 [2021-06-05 04:53:51,937 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:53:51,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466537567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:51,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:51,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 15 [2021-06-05 04:53:51,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692014466] [2021-06-05 04:53:51,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:53:51,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:51,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:53:51,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:53:51,938 INFO L87 Difference]: Start difference. First operand 1620 states and 5610 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:52,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:52,557 INFO L93 Difference]: Finished difference Result 1843 states and 6268 transitions. [2021-06-05 04:53:52,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 04:53:52,557 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:53:52,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:52,560 INFO L225 Difference]: With dead ends: 1843 [2021-06-05 04:53:52,560 INFO L226 Difference]: Without dead ends: 1774 [2021-06-05 04:53:52,560 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 433.1ms TimeCoverageRelationStatistics Valid=157, Invalid=965, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 04:53:52,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1774 states. [2021-06-05 04:53:52,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1774 to 1601. [2021-06-05 04:53:52,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1601 states, 1600 states have (on average 3.465625) internal successors, (5545), 1600 states have internal predecessors, (5545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:52,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1601 states to 1601 states and 5545 transitions. [2021-06-05 04:53:52,576 INFO L78 Accepts]: Start accepts. Automaton has 1601 states and 5545 transitions. Word has length 24 [2021-06-05 04:53:52,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:52,576 INFO L482 AbstractCegarLoop]: Abstraction has 1601 states and 5545 transitions. [2021-06-05 04:53:52,576 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:52,577 INFO L276 IsEmpty]: Start isEmpty. Operand 1601 states and 5545 transitions. [2021-06-05 04:53:52,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:53:52,578 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:52,578 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:53:52,779 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7140,332 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:52,779 INFO L430 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:52,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:52,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1848297742, now seen corresponding path program 331 times [2021-06-05 04:53:52,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:52,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131565349] [2021-06-05 04:53:52,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:52,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:52,926 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:52,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:52,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131565349] [2021-06-05 04:53:52,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131565349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:52,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849334183] [2021-06-05 04:53:52,926 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:53,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:53,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:53:53,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:53,207 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:53:53,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849334183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:53,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:53,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-06-05 04:53:53,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904889425] [2021-06-05 04:53:53,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:53:53,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:53,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:53:53,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:53:53,207 INFO L87 Difference]: Start difference. First operand 1601 states and 5545 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:55,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:55,308 INFO L93 Difference]: Finished difference Result 2411 states and 7945 transitions. [2021-06-05 04:53:55,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 04:53:55,309 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:53:55,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:55,312 INFO L225 Difference]: With dead ends: 2411 [2021-06-05 04:53:55,312 INFO L226 Difference]: Without dead ends: 2263 [2021-06-05 04:53:55,313 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1355 ImplicationChecksByTransitivity, 1653.7ms TimeCoverageRelationStatistics Valid=543, Invalid=4149, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 04:53:55,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2263 states. [2021-06-05 04:53:55,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2263 to 1593. [2021-06-05 04:53:55,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1593 states, 1592 states have (on average 3.4673366834170856) internal successors, (5520), 1592 states have internal predecessors, (5520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:55,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1593 states to 1593 states and 5520 transitions. [2021-06-05 04:53:55,332 INFO L78 Accepts]: Start accepts. Automaton has 1593 states and 5520 transitions. Word has length 24 [2021-06-05 04:53:55,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:55,332 INFO L482 AbstractCegarLoop]: Abstraction has 1593 states and 5520 transitions. [2021-06-05 04:53:55,332 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:55,332 INFO L276 IsEmpty]: Start isEmpty. Operand 1593 states and 5520 transitions. [2021-06-05 04:53:55,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:53:55,334 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:55,334 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:53:55,535 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7147 [2021-06-05 04:53:55,535 INFO L430 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:55,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:55,535 INFO L82 PathProgramCache]: Analyzing trace with hash -366197958, now seen corresponding path program 332 times [2021-06-05 04:53:55,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:55,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393986479] [2021-06-05 04:53:55,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:55,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:55,664 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:55,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:55,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393986479] [2021-06-05 04:53:55,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393986479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:55,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566256918] [2021-06-05 04:53:55,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:55,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:53:55,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:55,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:53:55,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:55,969 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:53:55,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566256918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:55,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:55,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-06-05 04:53:55,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710196136] [2021-06-05 04:53:55,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:53:55,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:55,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:53:55,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:53:55,970 INFO L87 Difference]: Start difference. First operand 1593 states and 5520 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:58,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:58,394 INFO L93 Difference]: Finished difference Result 2287 states and 7567 transitions. [2021-06-05 04:53:58,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 04:53:58,394 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:53:58,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:58,398 INFO L225 Difference]: With dead ends: 2287 [2021-06-05 04:53:58,398 INFO L226 Difference]: Without dead ends: 2127 [2021-06-05 04:53:58,398 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1631 ImplicationChecksByTransitivity, 1940.8ms TimeCoverageRelationStatistics Valid=596, Invalid=4806, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 04:53:58,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2127 states. [2021-06-05 04:53:58,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2127 to 1582. [2021-06-05 04:53:58,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1582 states, 1581 states have (on average 3.476913345983555) internal successors, (5497), 1581 states have internal predecessors, (5497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:58,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1582 states to 1582 states and 5497 transitions. [2021-06-05 04:53:58,418 INFO L78 Accepts]: Start accepts. Automaton has 1582 states and 5497 transitions. Word has length 24 [2021-06-05 04:53:58,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:58,418 INFO L482 AbstractCegarLoop]: Abstraction has 1582 states and 5497 transitions. [2021-06-05 04:53:58,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:53:58,418 INFO L276 IsEmpty]: Start isEmpty. Operand 1582 states and 5497 transitions. [2021-06-05 04:53:58,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:53:58,420 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:58,420 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:53:58,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7154,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:58,620 INFO L430 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:58,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:58,621 INFO L82 PathProgramCache]: Analyzing trace with hash -296087922, now seen corresponding path program 333 times [2021-06-05 04:53:58,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:58,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175557705] [2021-06-05 04:53:58,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:58,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:58,720 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:53:58,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:58,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175557705] [2021-06-05 04:53:58,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175557705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:58,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945595723] [2021-06-05 04:53:58,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:58,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:53:58,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:58,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:53:58,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:58,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:53:58,895 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:58,967 INFO L628 ElimStorePlain]: treesize reduction 6, result has 94.3 percent of original size [2021-06-05 04:53:58,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:53:58,970 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:59,005 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:59,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:53:59,008 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:59,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:53:59,011 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:59,059 INFO L628 ElimStorePlain]: treesize reduction 21, result has 74.7 percent of original size [2021-06-05 04:53:59,060 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:53:59,060 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:111, output treesize:62 [2021-06-05 04:53:59,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:53:59,168 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:59,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:59,172 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:59,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:59,175 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:59,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:59,178 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:59,246 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.6 percent of original size [2021-06-05 04:53:59,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:59,249 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:59,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:53:59,252 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:59,302 INFO L628 ElimStorePlain]: treesize reduction 15, result has 79.7 percent of original size [2021-06-05 04:53:59,303 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:53:59,303 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:99, output treesize:43 [2021-06-05 04:53:59,384 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:53:59,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945595723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:59,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:59,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 04:53:59,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7578127] [2021-06-05 04:53:59,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:53:59,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:59,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:53:59,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:53:59,384 INFO L87 Difference]: Start difference. First operand 1582 states and 5497 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:00,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:00,172 INFO L93 Difference]: Finished difference Result 1916 states and 6490 transitions. [2021-06-05 04:54:00,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 04:54:00,173 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:54:00,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:00,175 INFO L225 Difference]: With dead ends: 1916 [2021-06-05 04:54:00,175 INFO L226 Difference]: Without dead ends: 1856 [2021-06-05 04:54:00,175 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 620.7ms TimeCoverageRelationStatistics Valid=218, Invalid=1042, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 04:54:00,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1856 states. [2021-06-05 04:54:00,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1856 to 1606. [2021-06-05 04:54:00,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1606 states, 1605 states have (on average 3.485981308411215) internal successors, (5595), 1605 states have internal predecessors, (5595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:00,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1606 states to 1606 states and 5595 transitions. [2021-06-05 04:54:00,193 INFO L78 Accepts]: Start accepts. Automaton has 1606 states and 5595 transitions. Word has length 24 [2021-06-05 04:54:00,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:00,193 INFO L482 AbstractCegarLoop]: Abstraction has 1606 states and 5595 transitions. [2021-06-05 04:54:00,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:00,193 INFO L276 IsEmpty]: Start isEmpty. Operand 1606 states and 5595 transitions. [2021-06-05 04:54:00,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:54:00,195 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:00,195 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:00,395 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7164 [2021-06-05 04:54:00,395 INFO L430 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:00,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:00,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1317478812, now seen corresponding path program 334 times [2021-06-05 04:54:00,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:00,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192478152] [2021-06-05 04:54:00,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:00,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:00,501 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:00,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:00,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192478152] [2021-06-05 04:54:00,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192478152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:00,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486464751] [2021-06-05 04:54:00,501 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:54:00,617 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:54:00,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:54:00,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:54:00,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:54:00,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:54:00,675 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:00,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:54:00,678 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:00,680 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:00,681 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:00,748 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.0 percent of original size [2021-06-05 04:54:00,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:54:00,751 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:00,799 INFO L628 ElimStorePlain]: treesize reduction 26, result has 72.0 percent of original size [2021-06-05 04:54:00,799 INFO L518 ElimStorePlain]: Eliminatee v_prenex_282 vanished before elimination [2021-06-05 04:54:00,800 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:54:00,800 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:142, output treesize:67 [2021-06-05 04:54:00,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:54:00,903 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:00,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:54:00,906 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:00,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:54:00,909 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:00,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:54:00,912 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:00,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:54:00,915 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:00,974 INFO L628 ElimStorePlain]: treesize reduction 19, result has 79.3 percent of original size [2021-06-05 04:54:00,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:54:00,977 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:00,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:54:00,979 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:01,017 INFO L628 ElimStorePlain]: treesize reduction 15, result has 76.9 percent of original size [2021-06-05 04:54:01,019 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:54:01,019 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 3 variables, input treesize:111, output treesize:34 [2021-06-05 04:54:01,092 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:54:01,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486464751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:01,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:54:01,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 04:54:01,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518845152] [2021-06-05 04:54:01,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:54:01,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:01,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:54:01,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:54:01,093 INFO L87 Difference]: Start difference. First operand 1606 states and 5595 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:02,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:02,260 INFO L93 Difference]: Finished difference Result 1985 states and 6653 transitions. [2021-06-05 04:54:02,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 04:54:02,260 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:54:02,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:02,262 INFO L225 Difference]: With dead ends: 1985 [2021-06-05 04:54:02,263 INFO L226 Difference]: Without dead ends: 1906 [2021-06-05 04:54:02,263 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 885.2ms TimeCoverageRelationStatistics Valid=226, Invalid=1414, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 04:54:02,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1906 states. [2021-06-05 04:54:02,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1906 to 1545. [2021-06-05 04:54:02,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1545 states, 1544 states have (on average 3.461139896373057) internal successors, (5344), 1544 states have internal predecessors, (5344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:02,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1545 states to 1545 states and 5344 transitions. [2021-06-05 04:54:02,279 INFO L78 Accepts]: Start accepts. Automaton has 1545 states and 5344 transitions. Word has length 24 [2021-06-05 04:54:02,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:02,279 INFO L482 AbstractCegarLoop]: Abstraction has 1545 states and 5344 transitions. [2021-06-05 04:54:02,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:02,280 INFO L276 IsEmpty]: Start isEmpty. Operand 1545 states and 5344 transitions. [2021-06-05 04:54:02,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:54:02,281 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:02,281 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:02,482 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7180,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:54:02,482 INFO L430 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:02,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:02,482 INFO L82 PathProgramCache]: Analyzing trace with hash -201559986, now seen corresponding path program 335 times [2021-06-05 04:54:02,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:02,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884251988] [2021-06-05 04:54:02,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:02,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:02,572 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:02,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:02,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884251988] [2021-06-05 04:54:02,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884251988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:02,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706537985] [2021-06-05 04:54:02,573 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:54:02,689 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:54:02,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:54:02,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:54:02,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:54:02,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:54:02,748 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:02,841 INFO L628 ElimStorePlain]: treesize reduction 31, result has 81.3 percent of original size [2021-06-05 04:54:02,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:54:02,845 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:02,932 INFO L628 ElimStorePlain]: treesize reduction 6, result has 95.4 percent of original size [2021-06-05 04:54:02,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:54:02,935 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:02,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:54:02,938 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:03,002 INFO L628 ElimStorePlain]: treesize reduction 50, result has 55.4 percent of original size [2021-06-05 04:54:03,002 INFO L518 ElimStorePlain]: Eliminatee v_prenex_284 vanished before elimination [2021-06-05 04:54:03,002 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:54:03,003 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:171, output treesize:62 [2021-06-05 04:54:03,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:54:03,131 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:03,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:54:03,134 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:03,149 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:54:03,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:54:03,151 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:03,165 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:54:03,166 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:54:03,166 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:42, output treesize:16 [2021-06-05 04:54:03,200 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:54:03,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706537985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:03,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:54:03,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 04:54:03,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990582332] [2021-06-05 04:54:03,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:54:03,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:03,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:54:03,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:54:03,201 INFO L87 Difference]: Start difference. First operand 1545 states and 5344 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:04,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:04,117 INFO L93 Difference]: Finished difference Result 1877 states and 6305 transitions. [2021-06-05 04:54:04,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 04:54:04,118 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:54:04,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:04,120 INFO L225 Difference]: With dead ends: 1877 [2021-06-05 04:54:04,120 INFO L226 Difference]: Without dead ends: 1800 [2021-06-05 04:54:04,120 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 739.8ms TimeCoverageRelationStatistics Valid=186, Invalid=1374, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 04:54:04,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1800 states. [2021-06-05 04:54:04,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1800 to 1534. [2021-06-05 04:54:04,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1534 states, 1533 states have (on average 3.4494455316373123) internal successors, (5288), 1533 states have internal predecessors, (5288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:04,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1534 states to 1534 states and 5288 transitions. [2021-06-05 04:54:04,136 INFO L78 Accepts]: Start accepts. Automaton has 1534 states and 5288 transitions. Word has length 24 [2021-06-05 04:54:04,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:04,136 INFO L482 AbstractCegarLoop]: Abstraction has 1534 states and 5288 transitions. [2021-06-05 04:54:04,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:04,137 INFO L276 IsEmpty]: Start isEmpty. Operand 1534 states and 5288 transitions. [2021-06-05 04:54:04,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:54:04,138 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:04,138 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:04,338 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 337 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7197 [2021-06-05 04:54:04,339 INFO L430 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:04,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:04,339 INFO L82 PathProgramCache]: Analyzing trace with hash -47122468, now seen corresponding path program 336 times [2021-06-05 04:54:04,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:04,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928458826] [2021-06-05 04:54:04,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:04,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:04,441 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:04,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:04,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928458826] [2021-06-05 04:54:04,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928458826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:04,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190675251] [2021-06-05 04:54:04,442 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:54:04,560 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:54:04,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:54:04,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:54:04,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:54:04,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:54:04,613 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:04,700 INFO L628 ElimStorePlain]: treesize reduction 32, result has 75.8 percent of original size [2021-06-05 04:54:04,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:54:04,704 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:04,737 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:54:04,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:54:04,740 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:04,791 INFO L628 ElimStorePlain]: treesize reduction 21, result has 76.1 percent of original size [2021-06-05 04:54:04,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:54:04,794 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:04,817 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:54:04,818 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:54:04,818 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:137, output treesize:62 [2021-06-05 04:54:04,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:54:04,931 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:04,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:54:04,934 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:04,949 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:54:04,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:54:04,951 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:04,965 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:54:04,966 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:54:04,966 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:42, output treesize:16 [2021-06-05 04:54:05,001 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:54:05,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190675251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:05,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:54:05,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 04:54:05,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939424800] [2021-06-05 04:54:05,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:54:05,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:05,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:54:05,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:54:05,002 INFO L87 Difference]: Start difference. First operand 1534 states and 5288 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:05,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:05,976 INFO L93 Difference]: Finished difference Result 1768 states and 5949 transitions. [2021-06-05 04:54:05,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 04:54:05,976 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:54:05,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:05,978 INFO L225 Difference]: With dead ends: 1768 [2021-06-05 04:54:05,978 INFO L226 Difference]: Without dead ends: 1677 [2021-06-05 04:54:05,979 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 701.1ms TimeCoverageRelationStatistics Valid=164, Invalid=1168, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 04:54:05,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1677 states. [2021-06-05 04:54:05,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1677 to 1513. [2021-06-05 04:54:05,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1513 states, 1512 states have (on average 3.447089947089947) internal successors, (5212), 1512 states have internal predecessors, (5212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:05,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1513 states to 1513 states and 5212 transitions. [2021-06-05 04:54:05,994 INFO L78 Accepts]: Start accepts. Automaton has 1513 states and 5212 transitions. Word has length 24 [2021-06-05 04:54:05,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:05,994 INFO L482 AbstractCegarLoop]: Abstraction has 1513 states and 5212 transitions. [2021-06-05 04:54:05,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:05,994 INFO L276 IsEmpty]: Start isEmpty. Operand 1513 states and 5212 transitions. [2021-06-05 04:54:05,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:54:05,995 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:05,995 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:06,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7211 [2021-06-05 04:54:06,196 INFO L430 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:06,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:06,196 INFO L82 PathProgramCache]: Analyzing trace with hash -841957494, now seen corresponding path program 337 times [2021-06-05 04:54:06,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:06,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343187994] [2021-06-05 04:54:06,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:06,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:06,333 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:06,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:06,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343187994] [2021-06-05 04:54:06,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343187994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:06,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089079214] [2021-06-05 04:54:06,334 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:54:06,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:06,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:54:06,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:54:06,664 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:54:06,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089079214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:06,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:54:06,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-06-05 04:54:06,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112797921] [2021-06-05 04:54:06,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:54:06,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:06,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:54:06,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:54:06,665 INFO L87 Difference]: Start difference. First operand 1513 states and 5212 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:09,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:09,196 INFO L93 Difference]: Finished difference Result 2288 states and 7400 transitions. [2021-06-05 04:54:09,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 04:54:09,197 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:54:09,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:09,200 INFO L225 Difference]: With dead ends: 2288 [2021-06-05 04:54:09,200 INFO L226 Difference]: Without dead ends: 2168 [2021-06-05 04:54:09,200 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1201 ImplicationChecksByTransitivity, 1909.8ms TimeCoverageRelationStatistics Valid=573, Invalid=3849, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 04:54:09,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2168 states. [2021-06-05 04:54:09,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2168 to 1520. [2021-06-05 04:54:09,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1520 states, 1519 states have (on average 3.4476629361421987) internal successors, (5237), 1519 states have internal predecessors, (5237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:09,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1520 states to 1520 states and 5237 transitions. [2021-06-05 04:54:09,219 INFO L78 Accepts]: Start accepts. Automaton has 1520 states and 5237 transitions. Word has length 24 [2021-06-05 04:54:09,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:09,219 INFO L482 AbstractCegarLoop]: Abstraction has 1520 states and 5237 transitions. [2021-06-05 04:54:09,219 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:09,219 INFO L276 IsEmpty]: Start isEmpty. Operand 1520 states and 5237 transitions. [2021-06-05 04:54:09,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:54:09,220 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:09,220 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:09,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 339 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7224 [2021-06-05 04:54:09,421 INFO L430 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:09,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:09,421 INFO L82 PathProgramCache]: Analyzing trace with hash 771609240, now seen corresponding path program 338 times [2021-06-05 04:54:09,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:09,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105679343] [2021-06-05 04:54:09,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:09,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:09,620 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:09,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:09,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105679343] [2021-06-05 04:54:09,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105679343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:09,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786900108] [2021-06-05 04:54:09,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:54:09,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:54:09,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:54:09,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:54:09,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:54:09,998 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:54:09,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786900108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:09,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:54:09,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-06-05 04:54:09,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776121482] [2021-06-05 04:54:09,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:54:09,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:09,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:54:09,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:54:09,999 INFO L87 Difference]: Start difference. First operand 1520 states and 5237 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:12,649 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2021-06-05 04:54:13,059 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2021-06-05 04:54:13,436 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 38 [2021-06-05 04:54:13,696 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2021-06-05 04:54:14,346 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2021-06-05 04:54:14,708 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2021-06-05 04:54:14,848 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2021-06-05 04:54:15,376 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2021-06-05 04:54:15,563 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2021-06-05 04:54:15,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:15,891 INFO L93 Difference]: Finished difference Result 3187 states and 9796 transitions. [2021-06-05 04:54:15,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-06-05 04:54:15,891 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:54:15,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:15,895 INFO L225 Difference]: With dead ends: 3187 [2021-06-05 04:54:15,895 INFO L226 Difference]: Without dead ends: 2927 [2021-06-05 04:54:15,896 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2483 ImplicationChecksByTransitivity, 5125.8ms TimeCoverageRelationStatistics Valid=1010, Invalid=7180, Unknown=0, NotChecked=0, Total=8190 [2021-06-05 04:54:15,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2927 states. [2021-06-05 04:54:15,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2927 to 1494. [2021-06-05 04:54:15,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1494 states, 1493 states have (on average 3.4166108506363027) internal successors, (5101), 1493 states have internal predecessors, (5101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:15,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 5101 transitions. [2021-06-05 04:54:15,918 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 5101 transitions. Word has length 24 [2021-06-05 04:54:15,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:15,918 INFO L482 AbstractCegarLoop]: Abstraction has 1494 states and 5101 transitions. [2021-06-05 04:54:15,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:15,918 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 5101 transitions. [2021-06-05 04:54:15,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:54:15,919 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:15,919 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:16,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7232 [2021-06-05 04:54:16,120 INFO L430 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:16,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:16,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1854467236, now seen corresponding path program 339 times [2021-06-05 04:54:16,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:16,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385714227] [2021-06-05 04:54:16,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:16,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:16,226 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:16,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:16,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385714227] [2021-06-05 04:54:16,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385714227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:16,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629657211] [2021-06-05 04:54:16,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:54:16,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:54:16,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:54:16,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:54:16,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:54:16,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:54:16,421 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:16,508 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.1 percent of original size [2021-06-05 04:54:16,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:54:16,512 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:16,579 INFO L628 ElimStorePlain]: treesize reduction 22, result has 79.8 percent of original size [2021-06-05 04:54:16,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:54:16,582 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:16,613 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:54:16,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:54:16,617 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:16,663 INFO L628 ElimStorePlain]: treesize reduction 19, result has 76.3 percent of original size [2021-06-05 04:54:16,666 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: 3 dim-0 vars, and 3 xjuncts. [2021-06-05 04:54:16,666 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:117, output treesize:61 [2021-06-05 04:54:16,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:54:16,887 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:16,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:16,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:54:16,890 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:16,917 INFO L628 ElimStorePlain]: treesize reduction 21, result has 58.8 percent of original size [2021-06-05 04:54:16,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:54:16,919 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:16,929 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:54:16,929 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:54:16,929 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:73, output treesize:11 [2021-06-05 04:54:16,969 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:54:16,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629657211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:16,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:54:16,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-06-05 04:54:16,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921198555] [2021-06-05 04:54:16,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:54:16,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:16,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:54:16,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:54:16,970 INFO L87 Difference]: Start difference. First operand 1494 states and 5101 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:18,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:18,395 INFO L93 Difference]: Finished difference Result 1883 states and 6189 transitions. [2021-06-05 04:54:18,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 04:54:18,395 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:54:18,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:18,398 INFO L225 Difference]: With dead ends: 1883 [2021-06-05 04:54:18,398 INFO L226 Difference]: Without dead ends: 1784 [2021-06-05 04:54:18,398 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 1059.9ms TimeCoverageRelationStatistics Valid=246, Invalid=1476, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 04:54:18,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1784 states. [2021-06-05 04:54:18,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1784 to 1474. [2021-06-05 04:54:18,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1474 states, 1473 states have (on average 3.415478615071283) internal successors, (5031), 1473 states have internal predecessors, (5031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:18,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1474 states to 1474 states and 5031 transitions. [2021-06-05 04:54:18,414 INFO L78 Accepts]: Start accepts. Automaton has 1474 states and 5031 transitions. Word has length 24 [2021-06-05 04:54:18,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:18,415 INFO L482 AbstractCegarLoop]: Abstraction has 1474 states and 5031 transitions. [2021-06-05 04:54:18,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:18,415 INFO L276 IsEmpty]: Start isEmpty. Operand 1474 states and 5031 transitions. [2021-06-05 04:54:18,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:54:18,416 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:18,416 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:18,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7240 [2021-06-05 04:54:18,617 INFO L430 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:18,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:18,617 INFO L82 PathProgramCache]: Analyzing trace with hash 27651606, now seen corresponding path program 340 times [2021-06-05 04:54:18,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:18,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140608453] [2021-06-05 04:54:18,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:18,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:18,713 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:18,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:18,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140608453] [2021-06-05 04:54:18,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140608453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:18,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404682610] [2021-06-05 04:54:18,714 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:54:18,844 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:54:18,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:54:18,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:54:18,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:54:18,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:54:18,889 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:18,965 INFO L628 ElimStorePlain]: treesize reduction 63, result has 61.3 percent of original size [2021-06-05 04:54:18,965 INFO L518 ElimStorePlain]: Eliminatee v_prenex_297 vanished before elimination [2021-06-05 04:54:18,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:54:18,969 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:18,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:54:18,972 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:19,003 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:54:19,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:54:19,006 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:19,053 INFO L628 ElimStorePlain]: treesize reduction 21, result has 74.7 percent of original size [2021-06-05 04:54:19,054 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:54:19,054 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:168, output treesize:62 [2021-06-05 04:54:19,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:54:19,169 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:19,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:54:19,172 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:19,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:54:19,175 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:19,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:54:19,178 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:19,246 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.6 percent of original size [2021-06-05 04:54:19,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:54:19,249 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:19,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:54:19,252 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:19,302 INFO L628 ElimStorePlain]: treesize reduction 15, result has 79.7 percent of original size [2021-06-05 04:54:19,303 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:54:19,303 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:99, output treesize:43 [2021-06-05 04:54:19,384 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:54:19,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404682610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:19,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:54:19,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 04:54:19,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29404565] [2021-06-05 04:54:19,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:54:19,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:19,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:54:19,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:54:19,385 INFO L87 Difference]: Start difference. First operand 1474 states and 5031 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:20,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:20,552 INFO L93 Difference]: Finished difference Result 1848 states and 6050 transitions. [2021-06-05 04:54:20,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 04:54:20,552 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:54:20,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:20,554 INFO L225 Difference]: With dead ends: 1848 [2021-06-05 04:54:20,555 INFO L226 Difference]: Without dead ends: 1765 [2021-06-05 04:54:20,555 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 877.9ms TimeCoverageRelationStatistics Valid=226, Invalid=1414, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 04:54:20,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1765 states. [2021-06-05 04:54:20,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1765 to 1442. [2021-06-05 04:54:20,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1442 states, 1441 states have (on average 3.3795975017349065) internal successors, (4870), 1441 states have internal predecessors, (4870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:20,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 4870 transitions. [2021-06-05 04:54:20,570 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 4870 transitions. Word has length 24 [2021-06-05 04:54:20,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:20,570 INFO L482 AbstractCegarLoop]: Abstraction has 1442 states and 4870 transitions. [2021-06-05 04:54:20,570 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:20,570 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 4870 transitions. [2021-06-05 04:54:20,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:54:20,571 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:20,572 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:20,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7276,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:54:20,772 INFO L430 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:20,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:20,772 INFO L82 PathProgramCache]: Analyzing trace with hash 520247368, now seen corresponding path program 341 times [2021-06-05 04:54:20,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:20,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054640882] [2021-06-05 04:54:20,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:20,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:20,859 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:20,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:20,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054640882] [2021-06-05 04:54:20,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054640882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:20,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360045729] [2021-06-05 04:54:20,859 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:54:20,978 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:54:20,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:54:20,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:54:20,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:54:21,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:54:21,034 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:21,110 INFO L628 ElimStorePlain]: treesize reduction 63, result has 61.3 percent of original size [2021-06-05 04:54:21,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:54:21,113 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:21,168 INFO L628 ElimStorePlain]: treesize reduction 21, result has 77.7 percent of original size [2021-06-05 04:54:21,168 INFO L518 ElimStorePlain]: Eliminatee v_prenex_301 vanished before elimination [2021-06-05 04:54:21,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 04:54:21,171 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:21,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 04:54:21,174 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:21,197 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:54:21,198 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:54:21,198 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:168, output treesize:62 [2021-06-05 04:54:21,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:54:21,322 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:21,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:54:21,325 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:21,340 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:54:21,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:54:21,342 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:21,356 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:54:21,357 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:54:21,357 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:42, output treesize:16 [2021-06-05 04:54:21,394 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:54:21,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360045729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:21,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:54:21,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 04:54:21,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215441505] [2021-06-05 04:54:21,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:54:21,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:21,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:54:21,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:54:21,394 INFO L87 Difference]: Start difference. First operand 1442 states and 4870 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:22,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:22,449 INFO L93 Difference]: Finished difference Result 1760 states and 5793 transitions. [2021-06-05 04:54:22,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 04:54:22,449 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:54:22,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:22,451 INFO L225 Difference]: With dead ends: 1760 [2021-06-05 04:54:22,452 INFO L226 Difference]: Without dead ends: 1657 [2021-06-05 04:54:22,452 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 743.4ms TimeCoverageRelationStatistics Valid=186, Invalid=1374, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 04:54:22,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1657 states. [2021-06-05 04:54:22,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1657 to 1376. [2021-06-05 04:54:22,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1376 states, 1375 states have (on average 3.3767272727272726) internal successors, (4643), 1375 states have internal predecessors, (4643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:22,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1376 states to 1376 states and 4643 transitions. [2021-06-05 04:54:22,466 INFO L78 Accepts]: Start accepts. Automaton has 1376 states and 4643 transitions. Word has length 24 [2021-06-05 04:54:22,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:22,466 INFO L482 AbstractCegarLoop]: Abstraction has 1376 states and 4643 transitions. [2021-06-05 04:54:22,466 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:22,466 INFO L276 IsEmpty]: Start isEmpty. Operand 1376 states and 4643 transitions. [2021-06-05 04:54:22,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:54:22,467 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:22,467 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:22,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7291 [2021-06-05 04:54:22,668 INFO L430 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:22,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:22,668 INFO L82 PathProgramCache]: Analyzing trace with hash 326699018, now seen corresponding path program 342 times [2021-06-05 04:54:22,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:22,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172124087] [2021-06-05 04:54:22,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:22,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:22,761 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:22,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:22,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172124087] [2021-06-05 04:54:22,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172124087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:22,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886708083] [2021-06-05 04:54:22,762 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:54:22,881 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:54:22,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:54:22,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:54:22,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:54:22,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:54:22,953 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:23,010 INFO L628 ElimStorePlain]: treesize reduction 53, result has 55.1 percent of original size [2021-06-05 04:54:23,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:54:23,013 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:23,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:54:23,016 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:23,039 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:54:23,039 INFO L518 ElimStorePlain]: Eliminatee v_prenex_303 vanished before elimination [2021-06-05 04:54:23,040 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:54:23,040 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:122, output treesize:58 [2021-06-05 04:54:23,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:54:23,130 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:23,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:54:23,133 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:23,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:54:23,136 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:23,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:54:23,139 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:23,208 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.6 percent of original size [2021-06-05 04:54:23,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:54:23,211 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:23,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:54:23,214 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:23,264 INFO L628 ElimStorePlain]: treesize reduction 15, result has 79.7 percent of original size [2021-06-05 04:54:23,266 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:54:23,266 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:99, output treesize:43 [2021-06-05 04:54:23,335 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:54:23,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886708083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:23,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:54:23,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 15 [2021-06-05 04:54:23,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638963034] [2021-06-05 04:54:23,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:54:23,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:23,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:54:23,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:54:23,336 INFO L87 Difference]: Start difference. First operand 1376 states and 4643 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:24,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:24,047 INFO L93 Difference]: Finished difference Result 1650 states and 5378 transitions. [2021-06-05 04:54:24,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 04:54:24,047 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:54:24,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:24,049 INFO L225 Difference]: With dead ends: 1650 [2021-06-05 04:54:24,050 INFO L226 Difference]: Without dead ends: 1576 [2021-06-05 04:54:24,050 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 558.6ms TimeCoverageRelationStatistics Valid=227, Invalid=963, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 04:54:24,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1576 states. [2021-06-05 04:54:24,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1576 to 1358. [2021-06-05 04:54:24,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1358 states, 1357 states have (on average 3.3559322033898304) internal successors, (4554), 1357 states have internal predecessors, (4554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:24,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1358 states to 1358 states and 4554 transitions. [2021-06-05 04:54:24,064 INFO L78 Accepts]: Start accepts. Automaton has 1358 states and 4554 transitions. Word has length 24 [2021-06-05 04:54:24,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:24,064 INFO L482 AbstractCegarLoop]: Abstraction has 1358 states and 4554 transitions. [2021-06-05 04:54:24,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:24,065 INFO L276 IsEmpty]: Start isEmpty. Operand 1358 states and 4554 transitions. [2021-06-05 04:54:24,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:54:24,066 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:24,066 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:24,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7304,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:54:24,266 INFO L430 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:24,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:24,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1617240540, now seen corresponding path program 343 times [2021-06-05 04:54:24,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:24,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367304654] [2021-06-05 04:54:24,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:24,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:24,352 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:24,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:24,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367304654] [2021-06-05 04:54:24,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367304654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:24,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705014126] [2021-06-05 04:54:24,353 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:54:24,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:24,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:54:24,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:54:24,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:54:24,531 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:24,601 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.9 percent of original size [2021-06-05 04:54:24,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:54:24,604 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:24,638 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:54:24,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:54:24,641 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:24,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:54:24,644 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:24,691 INFO L628 ElimStorePlain]: treesize reduction 19, result has 76.3 percent of original size [2021-06-05 04:54:24,692 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:54:24,692 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:95, output treesize:61 [2021-06-05 04:54:24,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:54:24,756 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:24,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:54:24,759 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:24,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:54:24,763 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:24,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:54:24,766 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:24,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:54:24,769 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:24,829 INFO L628 ElimStorePlain]: treesize reduction 19, result has 79.3 percent of original size [2021-06-05 04:54:24,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:54:24,832 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:24,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:54:24,835 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:24,874 INFO L628 ElimStorePlain]: treesize reduction 15, result has 76.9 percent of original size [2021-06-05 04:54:24,875 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:54:24,875 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 3 variables, input treesize:111, output treesize:34 [2021-06-05 04:54:24,938 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:54:24,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705014126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:24,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:54:24,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 15 [2021-06-05 04:54:24,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647200432] [2021-06-05 04:54:24,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:54:24,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:24,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:54:24,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:54:24,939 INFO L87 Difference]: Start difference. First operand 1358 states and 4554 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:25,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:25,879 INFO L93 Difference]: Finished difference Result 1627 states and 5306 transitions. [2021-06-05 04:54:25,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 04:54:25,879 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:54:25,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:25,881 INFO L225 Difference]: With dead ends: 1627 [2021-06-05 04:54:25,881 INFO L226 Difference]: Without dead ends: 1534 [2021-06-05 04:54:25,881 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 711.4ms TimeCoverageRelationStatistics Valid=210, Invalid=1272, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 04:54:25,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1534 states. [2021-06-05 04:54:25,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1534 to 1251. [2021-06-05 04:54:25,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1251 states, 1250 states have (on average 3.344) internal successors, (4180), 1250 states have internal predecessors, (4180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:25,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1251 states to 1251 states and 4180 transitions. [2021-06-05 04:54:25,895 INFO L78 Accepts]: Start accepts. Automaton has 1251 states and 4180 transitions. Word has length 24 [2021-06-05 04:54:25,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:25,895 INFO L482 AbstractCegarLoop]: Abstraction has 1251 states and 4180 transitions. [2021-06-05 04:54:25,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:25,895 INFO L276 IsEmpty]: Start isEmpty. Operand 1251 states and 4180 transitions. [2021-06-05 04:54:25,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:54:25,896 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:25,896 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:26,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7318 [2021-06-05 04:54:26,097 INFO L430 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:26,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:26,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1252048260, now seen corresponding path program 344 times [2021-06-05 04:54:26,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:26,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690583693] [2021-06-05 04:54:26,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:26,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:26,184 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:54:26,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:26,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690583693] [2021-06-05 04:54:26,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690583693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:26,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446792218] [2021-06-05 04:54:26,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:54:26,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:54:26,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:54:26,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:54:26,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:54:26,485 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:54:26,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446792218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:26,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:54:26,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 04:54:26,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977346371] [2021-06-05 04:54:26,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:54:26,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:26,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:54:26,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:54:26,486 INFO L87 Difference]: Start difference. First operand 1251 states and 4180 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:26,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:26,670 INFO L93 Difference]: Finished difference Result 1572 states and 5105 transitions. [2021-06-05 04:54:26,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:54:26,671 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:54:26,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:26,673 INFO L225 Difference]: With dead ends: 1572 [2021-06-05 04:54:26,673 INFO L226 Difference]: Without dead ends: 1509 [2021-06-05 04:54:26,673 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 273.1ms TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:54:26,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1509 states. [2021-06-05 04:54:26,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1509 to 1251. [2021-06-05 04:54:26,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1251 states, 1250 states have (on average 3.344) internal successors, (4180), 1250 states have internal predecessors, (4180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:26,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1251 states to 1251 states and 4180 transitions. [2021-06-05 04:54:26,686 INFO L78 Accepts]: Start accepts. Automaton has 1251 states and 4180 transitions. Word has length 24 [2021-06-05 04:54:26,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:26,686 INFO L482 AbstractCegarLoop]: Abstraction has 1251 states and 4180 transitions. [2021-06-05 04:54:26,686 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:26,686 INFO L276 IsEmpty]: Start isEmpty. Operand 1251 states and 4180 transitions. [2021-06-05 04:54:26,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:54:26,687 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:26,687 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:26,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7337,346 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:54:26,888 INFO L430 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:26,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:26,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1133518474, now seen corresponding path program 345 times [2021-06-05 04:54:26,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:26,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937781089] [2021-06-05 04:54:26,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:26,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:26,969 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:54:26,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:26,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937781089] [2021-06-05 04:54:26,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937781089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:26,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035880739] [2021-06-05 04:54:26,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:54:27,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:54:27,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:54:27,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:54:27,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:54:27,268 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:54:27,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035880739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:27,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:54:27,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 04:54:27,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824546884] [2021-06-05 04:54:27,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:54:27,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:27,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:54:27,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:54:27,269 INFO L87 Difference]: Start difference. First operand 1251 states and 4180 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:27,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:27,422 INFO L93 Difference]: Finished difference Result 1425 states and 4662 transitions. [2021-06-05 04:54:27,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:54:27,422 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:54:27,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:27,424 INFO L225 Difference]: With dead ends: 1425 [2021-06-05 04:54:27,424 INFO L226 Difference]: Without dead ends: 1342 [2021-06-05 04:54:27,424 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 214.6ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:54:27,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1342 states. [2021-06-05 04:54:27,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1342 to 1198. [2021-06-05 04:54:27,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 1197 states have (on average 3.343358395989975) internal successors, (4002), 1197 states have internal predecessors, (4002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:27,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 4002 transitions. [2021-06-05 04:54:27,436 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 4002 transitions. Word has length 24 [2021-06-05 04:54:27,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:27,436 INFO L482 AbstractCegarLoop]: Abstraction has 1198 states and 4002 transitions. [2021-06-05 04:54:27,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:27,436 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 4002 transitions. [2021-06-05 04:54:27,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:54:27,437 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:27,437 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:27,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7348,347 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:54:27,638 INFO L430 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:27,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:27,638 INFO L82 PathProgramCache]: Analyzing trace with hash 581879458, now seen corresponding path program 346 times [2021-06-05 04:54:27,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:27,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901554710] [2021-06-05 04:54:27,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:27,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:27,726 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:54:27,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:27,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901554710] [2021-06-05 04:54:27,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901554710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:27,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331913187] [2021-06-05 04:54:27,726 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:54:27,844 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:54:27,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:54:27,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:54:27,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:54:27,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:54:27,887 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:27,901 INFO L628 ElimStorePlain]: treesize reduction 2, result has 87.5 percent of original size [2021-06-05 04:54:27,901 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:54:27,901 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:14 [2021-06-05 04:54:28,023 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:54:28,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331913187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:28,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:54:28,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 04:54:28,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60879754] [2021-06-05 04:54:28,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:54:28,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:28,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:54:28,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:54:28,024 INFO L87 Difference]: Start difference. First operand 1198 states and 4002 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:28,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:28,175 INFO L93 Difference]: Finished difference Result 1478 states and 4858 transitions. [2021-06-05 04:54:28,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:54:28,176 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:54:28,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:28,177 INFO L225 Difference]: With dead ends: 1478 [2021-06-05 04:54:28,177 INFO L226 Difference]: Without dead ends: 1415 [2021-06-05 04:54:28,178 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 199.2ms TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:54:28,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1415 states. [2021-06-05 04:54:28,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1415 to 1173. [2021-06-05 04:54:28,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1173 states, 1172 states have (on average 3.319965870307167) internal successors, (3891), 1172 states have internal predecessors, (3891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:28,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1173 states to 1173 states and 3891 transitions. [2021-06-05 04:54:28,194 INFO L78 Accepts]: Start accepts. Automaton has 1173 states and 3891 transitions. Word has length 24 [2021-06-05 04:54:28,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:28,194 INFO L482 AbstractCegarLoop]: Abstraction has 1173 states and 3891 transitions. [2021-06-05 04:54:28,194 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:28,194 INFO L276 IsEmpty]: Start isEmpty. Operand 1173 states and 3891 transitions. [2021-06-05 04:54:28,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:54:28,196 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:28,196 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:28,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7360,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:54:28,409 INFO L430 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:28,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:28,409 INFO L82 PathProgramCache]: Analyzing trace with hash -761852682, now seen corresponding path program 347 times [2021-06-05 04:54:28,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:28,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366038551] [2021-06-05 04:54:28,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:28,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:28,500 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:54:28,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:28,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366038551] [2021-06-05 04:54:28,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366038551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:28,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993786883] [2021-06-05 04:54:28,501 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:54:28,621 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:54:28,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:54:28,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:54:28,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:54:28,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:54:28,692 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:28,766 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.0 percent of original size [2021-06-05 04:54:28,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:54:28,770 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:28,827 INFO L628 ElimStorePlain]: treesize reduction 38, result has 59.1 percent of original size [2021-06-05 04:54:28,827 INFO L518 ElimStorePlain]: Eliminatee v_prenex_308 vanished before elimination [2021-06-05 04:54:28,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:54:28,830 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:28,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:54:28,849 INFO L518 ElimStorePlain]: Eliminatee v_prenex_309 vanished before elimination [2021-06-05 04:54:28,849 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:54:28,849 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:102, output treesize:52 [2021-06-05 04:54:28,955 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:54:28,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993786883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:28,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:54:28,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 04:54:28,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516802039] [2021-06-05 04:54:28,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:54:28,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:28,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:54:28,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:54:28,956 INFO L87 Difference]: Start difference. First operand 1173 states and 3891 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:29,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:29,148 INFO L93 Difference]: Finished difference Result 1470 states and 4693 transitions. [2021-06-05 04:54:29,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:54:29,149 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:54:29,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:29,151 INFO L225 Difference]: With dead ends: 1470 [2021-06-05 04:54:29,151 INFO L226 Difference]: Without dead ends: 1407 [2021-06-05 04:54:29,151 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 272.0ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:54:29,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1407 states. [2021-06-05 04:54:29,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1407 to 1130. [2021-06-05 04:54:29,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1130 states, 1129 states have (on average 3.2719220549158545) internal successors, (3694), 1129 states have internal predecessors, (3694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:29,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1130 states to 1130 states and 3694 transitions. [2021-06-05 04:54:29,163 INFO L78 Accepts]: Start accepts. Automaton has 1130 states and 3694 transitions. Word has length 24 [2021-06-05 04:54:29,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:29,163 INFO L482 AbstractCegarLoop]: Abstraction has 1130 states and 3694 transitions. [2021-06-05 04:54:29,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:29,163 INFO L276 IsEmpty]: Start isEmpty. Operand 1130 states and 3694 transitions. [2021-06-05 04:54:29,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:54:29,164 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:29,164 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:29,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7383,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:54:29,364 INFO L430 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:29,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:29,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1623714052, now seen corresponding path program 348 times [2021-06-05 04:54:29,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:29,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667430704] [2021-06-05 04:54:29,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:29,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:29,445 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:54:29,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:29,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667430704] [2021-06-05 04:54:29,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667430704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:29,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123271793] [2021-06-05 04:54:29,446 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:54:29,565 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:54:29,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:54:29,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:54:29,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:54:29,728 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:54:29,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123271793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:29,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:54:29,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:54:29,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440561309] [2021-06-05 04:54:29,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:54:29,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:29,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:54:29,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:54:29,729 INFO L87 Difference]: Start difference. First operand 1130 states and 3694 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:29,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:29,919 INFO L93 Difference]: Finished difference Result 1323 states and 4250 transitions. [2021-06-05 04:54:29,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:54:29,919 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:54:29,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:29,921 INFO L225 Difference]: With dead ends: 1323 [2021-06-05 04:54:29,921 INFO L226 Difference]: Without dead ends: 1248 [2021-06-05 04:54:29,921 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 242.5ms TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:54:29,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-06-05 04:54:29,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 1088. [2021-06-05 04:54:29,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1088 states, 1087 states have (on average 3.2594296228150874) internal successors, (3543), 1087 states have internal predecessors, (3543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:29,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1088 states to 1088 states and 3543 transitions. [2021-06-05 04:54:29,931 INFO L78 Accepts]: Start accepts. Automaton has 1088 states and 3543 transitions. Word has length 24 [2021-06-05 04:54:29,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:29,931 INFO L482 AbstractCegarLoop]: Abstraction has 1088 states and 3543 transitions. [2021-06-05 04:54:29,931 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:29,931 INFO L276 IsEmpty]: Start isEmpty. Operand 1088 states and 3543 transitions. [2021-06-05 04:54:29,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:54:29,932 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:29,933 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:30,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7400 [2021-06-05 04:54:30,133 INFO L430 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:30,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:30,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1130511476, now seen corresponding path program 349 times [2021-06-05 04:54:30,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:30,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160944465] [2021-06-05 04:54:30,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:30,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:30,206 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:30,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:30,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160944465] [2021-06-05 04:54:30,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160944465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:30,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296112704] [2021-06-05 04:54:30,206 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:54:30,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:30,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 04:54:30,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:54:30,665 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_310, ends_with_6], 1=[ends_with_10]} [2021-06-05 04:54:30,668 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:30,668 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:30,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:54:30,672 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:30,762 INFO L628 ElimStorePlain]: treesize reduction 145, result has 39.3 percent of original size [2021-06-05 04:54:30,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:54:30,766 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:30,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:54:30,769 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:30,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:54:30,772 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:30,824 INFO L628 ElimStorePlain]: treesize reduction 21, result has 74.7 percent of original size [2021-06-05 04:54:30,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:54:30,827 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:30,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:54:30,830 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:30,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:54:30,833 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:30,870 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.0 percent of original size [2021-06-05 04:54:30,871 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:54:30,871 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 4 variables, input treesize:268, output treesize:24 [2021-06-05 04:54:30,923 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:30,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296112704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:30,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:54:30,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:54:30,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106893596] [2021-06-05 04:54:30,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:54:30,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:30,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:54:30,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:54:30,924 INFO L87 Difference]: Start difference. First operand 1088 states and 3543 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:31,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:31,135 INFO L93 Difference]: Finished difference Result 1584 states and 5045 transitions. [2021-06-05 04:54:31,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:54:31,135 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:54:31,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:31,137 INFO L225 Difference]: With dead ends: 1584 [2021-06-05 04:54:31,137 INFO L226 Difference]: Without dead ends: 1515 [2021-06-05 04:54:31,137 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 262.8ms TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:54:31,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1515 states. [2021-06-05 04:54:31,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1515 to 1136. [2021-06-05 04:54:31,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1136 states, 1135 states have (on average 3.289867841409692) internal successors, (3734), 1135 states have internal predecessors, (3734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:31,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 3734 transitions. [2021-06-05 04:54:31,150 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 3734 transitions. Word has length 24 [2021-06-05 04:54:31,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:31,150 INFO L482 AbstractCegarLoop]: Abstraction has 1136 states and 3734 transitions. [2021-06-05 04:54:31,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:31,150 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 3734 transitions. [2021-06-05 04:54:31,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:54:31,151 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:31,151 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:31,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 351 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7412 [2021-06-05 04:54:31,351 INFO L430 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:31,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:31,352 INFO L82 PathProgramCache]: Analyzing trace with hash 54570504, now seen corresponding path program 350 times [2021-06-05 04:54:31,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:31,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101878952] [2021-06-05 04:54:31,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:31,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:31,428 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:31,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:31,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101878952] [2021-06-05 04:54:31,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101878952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:31,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047585185] [2021-06-05 04:54:31,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:54:31,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:54:31,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:54:31,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 04:54:31,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:54:31,915 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_311, ends_with_6], 1=[ends_with_10]} [2021-06-05 04:54:31,918 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:31,919 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:31,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:54:31,922 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:32,011 INFO L628 ElimStorePlain]: treesize reduction 145, result has 39.3 percent of original size [2021-06-05 04:54:32,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:54:32,014 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:32,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:54:32,018 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:32,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:54:32,020 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:32,071 INFO L628 ElimStorePlain]: treesize reduction 21, result has 74.7 percent of original size [2021-06-05 04:54:32,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:54:32,074 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:32,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:54:32,077 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:32,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:54:32,079 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:32,117 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.0 percent of original size [2021-06-05 04:54:32,118 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:54:32,118 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 4 variables, input treesize:268, output treesize:24 [2021-06-05 04:54:32,182 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:32,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047585185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:32,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:54:32,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 04:54:32,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157721959] [2021-06-05 04:54:32,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:54:32,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:32,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:54:32,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:54:32,183 INFO L87 Difference]: Start difference. First operand 1136 states and 3734 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:32,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:32,427 INFO L93 Difference]: Finished difference Result 1687 states and 5370 transitions. [2021-06-05 04:54:32,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:54:32,428 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:54:32,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:32,430 INFO L225 Difference]: With dead ends: 1687 [2021-06-05 04:54:32,430 INFO L226 Difference]: Without dead ends: 1635 [2021-06-05 04:54:32,430 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 311.3ms TimeCoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:54:32,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1635 states. [2021-06-05 04:54:32,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1635 to 1134. [2021-06-05 04:54:32,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1134 states, 1133 states have (on average 3.2983230361871136) internal successors, (3737), 1133 states have internal predecessors, (3737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:32,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1134 states to 1134 states and 3737 transitions. [2021-06-05 04:54:32,442 INFO L78 Accepts]: Start accepts. Automaton has 1134 states and 3737 transitions. Word has length 24 [2021-06-05 04:54:32,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:32,442 INFO L482 AbstractCegarLoop]: Abstraction has 1134 states and 3737 transitions. [2021-06-05 04:54:32,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:32,443 INFO L276 IsEmpty]: Start isEmpty. Operand 1134 states and 3737 transitions. [2021-06-05 04:54:32,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:54:32,444 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:32,444 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:32,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7506,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:54:32,644 INFO L430 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:32,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:32,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1814623444, now seen corresponding path program 351 times [2021-06-05 04:54:32,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:32,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123544490] [2021-06-05 04:54:32,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:32,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:32,715 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:32,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:32,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123544490] [2021-06-05 04:54:32,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123544490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:32,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18362162] [2021-06-05 04:54:32,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:54:32,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:54:32,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:54:32,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 04:54:32,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:54:33,029 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_313, v_prenex_312, ends_with_6], 1=[ends_with_10]} [2021-06-05 04:54:33,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:54:33,033 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:33,091 INFO L628 ElimStorePlain]: treesize reduction 94, result has 32.4 percent of original size [2021-06-05 04:54:33,091 INFO L518 ElimStorePlain]: Eliminatee v_prenex_312 vanished before elimination [2021-06-05 04:54:33,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:54:33,094 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:33,126 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.6 percent of original size [2021-06-05 04:54:33,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:54:33,130 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:33,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:54:33,132 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:33,144 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:54:33,145 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:54:33,146 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:142, output treesize:16 [2021-06-05 04:54:33,187 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:33,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18362162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:33,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:54:33,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 04:54:33,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768957347] [2021-06-05 04:54:33,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:54:33,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:33,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:54:33,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:54:33,188 INFO L87 Difference]: Start difference. First operand 1134 states and 3737 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:33,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:33,435 INFO L93 Difference]: Finished difference Result 1432 states and 4583 transitions. [2021-06-05 04:54:33,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:54:33,435 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:54:33,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:33,437 INFO L225 Difference]: With dead ends: 1432 [2021-06-05 04:54:33,437 INFO L226 Difference]: Without dead ends: 1380 [2021-06-05 04:54:33,437 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 283.4ms TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:54:33,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1380 states. [2021-06-05 04:54:33,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1380 to 1094. [2021-06-05 04:54:33,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1094 states, 1093 states have (on average 3.262580054894785) internal successors, (3566), 1093 states have internal predecessors, (3566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:33,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1094 states to 1094 states and 3566 transitions. [2021-06-05 04:54:33,449 INFO L78 Accepts]: Start accepts. Automaton has 1094 states and 3566 transitions. Word has length 24 [2021-06-05 04:54:33,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:33,449 INFO L482 AbstractCegarLoop]: Abstraction has 1094 states and 3566 transitions. [2021-06-05 04:54:33,450 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:33,450 INFO L276 IsEmpty]: Start isEmpty. Operand 1094 states and 3566 transitions. [2021-06-05 04:54:33,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:54:33,451 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:33,451 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:33,651 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7601,353 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:54:33,651 INFO L430 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:33,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:33,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1658558706, now seen corresponding path program 352 times [2021-06-05 04:54:33,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:33,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739045038] [2021-06-05 04:54:33,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:33,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:33,746 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:54:33,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:33,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739045038] [2021-06-05 04:54:33,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739045038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:33,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276369703] [2021-06-05 04:54:33,746 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:54:33,866 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:54:33,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:54:33,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 04:54:33,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:54:33,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:54:33,962 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:33,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:54:33,965 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:33,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:54:33,968 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:33,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:54:33,972 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:34,031 INFO L628 ElimStorePlain]: treesize reduction 55, result has 54.9 percent of original size [2021-06-05 04:54:34,031 INFO L518 ElimStorePlain]: Eliminatee ends_with_6 vanished before elimination [2021-06-05 04:54:34,033 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 04:54:34,033 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:137, output treesize:59 [2021-06-05 04:54:34,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:34,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:34,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:54:34,132 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:34,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:54:34,134 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:34,140 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:54:34,141 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:54:34,141 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:41, output treesize:11 [2021-06-05 04:54:34,178 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:34,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276369703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:34,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:54:34,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 04:54:34,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278339556] [2021-06-05 04:54:34,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:54:34,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:34,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:54:34,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:54:34,178 INFO L87 Difference]: Start difference. First operand 1094 states and 3566 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:35,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:35,578 INFO L93 Difference]: Finished difference Result 1761 states and 5439 transitions. [2021-06-05 04:54:35,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 04:54:35,579 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:54:35,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:35,581 INFO L225 Difference]: With dead ends: 1761 [2021-06-05 04:54:35,581 INFO L226 Difference]: Without dead ends: 1531 [2021-06-05 04:54:35,581 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 1097.7ms TimeCoverageRelationStatistics Valid=225, Invalid=1497, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 04:54:35,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1531 states. [2021-06-05 04:54:35,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1531 to 1136. [2021-06-05 04:54:35,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1136 states, 1135 states have (on average 3.2731277533039647) internal successors, (3715), 1135 states have internal predecessors, (3715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:35,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 3715 transitions. [2021-06-05 04:54:35,594 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 3715 transitions. Word has length 24 [2021-06-05 04:54:35,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:35,594 INFO L482 AbstractCegarLoop]: Abstraction has 1136 states and 3715 transitions. [2021-06-05 04:54:35,594 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:35,594 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 3715 transitions. [2021-06-05 04:54:35,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:54:35,595 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:35,595 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:35,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7627,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:54:35,796 INFO L430 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:35,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:35,796 INFO L82 PathProgramCache]: Analyzing trace with hash -98423810, now seen corresponding path program 353 times [2021-06-05 04:54:35,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:35,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886872440] [2021-06-05 04:54:35,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:35,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:35,947 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:35,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:35,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886872440] [2021-06-05 04:54:35,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886872440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:35,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661363454] [2021-06-05 04:54:35,947 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:54:36,068 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:54:36,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:54:36,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 04:54:36,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:54:36,346 INFO L446 ElimStorePlain]: Different costs {0=[ends_with_6, v_prenex_316], 1=[ends_with_10]} [2021-06-05 04:54:36,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:54:36,350 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:36,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:54:36,353 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:36,356 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:36,356 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:36,358 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:36,359 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:36,410 INFO L628 ElimStorePlain]: treesize reduction 41, result has 55.9 percent of original size [2021-06-05 04:54:36,410 INFO L518 ElimStorePlain]: Eliminatee v_prenex_316 vanished before elimination [2021-06-05 04:54:36,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:54:36,413 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:36,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:54:36,416 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:36,436 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:54:36,437 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 3 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:54:36,437 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:172, output treesize:16 [2021-06-05 04:54:36,479 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:36,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661363454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:36,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:54:36,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-06-05 04:54:36,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762516034] [2021-06-05 04:54:36,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:54:36,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:36,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:54:36,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:54:36,479 INFO L87 Difference]: Start difference. First operand 1136 states and 3715 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:36,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:36,936 INFO L93 Difference]: Finished difference Result 1472 states and 4723 transitions. [2021-06-05 04:54:36,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:54:36,936 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:54:36,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:36,938 INFO L225 Difference]: With dead ends: 1472 [2021-06-05 04:54:36,938 INFO L226 Difference]: Without dead ends: 1420 [2021-06-05 04:54:36,938 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 473.8ms TimeCoverageRelationStatistics Valid=122, Invalid=634, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:54:36,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1420 states. [2021-06-05 04:54:36,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1420 to 1136. [2021-06-05 04:54:36,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1136 states, 1135 states have (on average 3.2731277533039647) internal successors, (3715), 1135 states have internal predecessors, (3715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:36,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 3715 transitions. [2021-06-05 04:54:36,950 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 3715 transitions. Word has length 24 [2021-06-05 04:54:36,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:36,950 INFO L482 AbstractCegarLoop]: Abstraction has 1136 states and 3715 transitions. [2021-06-05 04:54:36,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:36,950 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 3715 transitions. [2021-06-05 04:54:36,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:54:36,952 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:36,952 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:37,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7646,355 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:54:37,152 INFO L430 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:37,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:37,152 INFO L82 PathProgramCache]: Analyzing trace with hash -320984176, now seen corresponding path program 354 times [2021-06-05 04:54:37,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:37,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757388527] [2021-06-05 04:54:37,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:37,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:37,304 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:37,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:37,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757388527] [2021-06-05 04:54:37,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757388527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:37,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885613367] [2021-06-05 04:54:37,304 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:54:37,425 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:54:37,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:54:37,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 04:54:37,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:54:37,752 INFO L446 ElimStorePlain]: Different costs {0=[ends_with_6, v_prenex_317, v_prenex_318], 1=[ends_with_10]} [2021-06-05 04:54:37,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:54:37,757 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:37,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:54:37,761 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:37,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:54:37,777 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:37,780 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:37,781 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:37,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:54:37,785 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:37,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:54:37,788 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:37,910 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2021-06-05 04:54:37,911 INFO L628 ElimStorePlain]: treesize reduction 180, result has 39.6 percent of original size [2021-06-05 04:54:37,911 INFO L518 ElimStorePlain]: Eliminatee v_prenex_317 vanished before elimination [2021-06-05 04:54:37,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:54:37,914 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:37,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:54:37,918 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:37,966 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:54:37,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:54:37,970 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:37,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:54:37,973 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:37,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:54:37,976 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:37,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:54:37,979 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:38,047 INFO L628 ElimStorePlain]: treesize reduction 20, result has 79.4 percent of original size [2021-06-05 04:54:38,048 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:54:38,048 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:353, output treesize:31 [2021-06-05 04:54:38,125 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:38,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885613367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:38,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:54:38,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-06-05 04:54:38,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058114555] [2021-06-05 04:54:38,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:54:38,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:38,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:54:38,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:54:38,126 INFO L87 Difference]: Start difference. First operand 1136 states and 3715 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:38,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:38,689 INFO L93 Difference]: Finished difference Result 1574 states and 5014 transitions. [2021-06-05 04:54:38,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:54:38,689 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:54:38,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:38,691 INFO L225 Difference]: With dead ends: 1574 [2021-06-05 04:54:38,691 INFO L226 Difference]: Without dead ends: 1505 [2021-06-05 04:54:38,692 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 571.1ms TimeCoverageRelationStatistics Valid=132, Invalid=798, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:54:38,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1505 states. [2021-06-05 04:54:38,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1505 to 1163. [2021-06-05 04:54:38,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1163 states, 1162 states have (on average 3.2900172117039586) internal successors, (3823), 1162 states have internal predecessors, (3823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:38,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1163 states to 1163 states and 3823 transitions. [2021-06-05 04:54:38,704 INFO L78 Accepts]: Start accepts. Automaton has 1163 states and 3823 transitions. Word has length 24 [2021-06-05 04:54:38,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:38,704 INFO L482 AbstractCegarLoop]: Abstraction has 1163 states and 3823 transitions. [2021-06-05 04:54:38,704 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:38,704 INFO L276 IsEmpty]: Start isEmpty. Operand 1163 states and 3823 transitions. [2021-06-05 04:54:38,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:54:38,705 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:38,706 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:38,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 356 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7695 [2021-06-05 04:54:38,906 INFO L430 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:38,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:38,906 INFO L82 PathProgramCache]: Analyzing trace with hash 825622932, now seen corresponding path program 355 times [2021-06-05 04:54:38,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:38,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91439489] [2021-06-05 04:54:38,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:38,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:39,061 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:39,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:39,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91439489] [2021-06-05 04:54:39,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91439489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:39,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024616170] [2021-06-05 04:54:39,061 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:54:39,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:39,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 04:54:39,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:54:39,530 INFO L446 ElimStorePlain]: Different costs {0=[ends_with_6, v_prenex_319], 1=[ends_with_10]} [2021-06-05 04:54:39,534 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:54:39,535 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:39,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:54:39,538 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:39,676 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2021-06-05 04:54:39,676 INFO L628 ElimStorePlain]: treesize reduction 112, result has 57.4 percent of original size [2021-06-05 04:54:39,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:54:39,680 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:39,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:54:39,683 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:39,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:54:39,687 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:39,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:54:39,690 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:39,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:54:39,693 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:39,790 INFO L628 ElimStorePlain]: treesize reduction 21, result has 84.2 percent of original size [2021-06-05 04:54:39,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:54:39,794 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:39,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:54:39,797 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:39,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:54:39,800 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:39,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:54:39,803 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:39,871 INFO L628 ElimStorePlain]: treesize reduction 20, result has 79.4 percent of original size [2021-06-05 04:54:39,872 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 3 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:54:39,872 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:298, output treesize:31 [2021-06-05 04:54:39,951 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:39,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024616170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:39,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:54:39,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-06-05 04:54:39,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404801126] [2021-06-05 04:54:39,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:54:39,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:39,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:54:39,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:54:39,952 INFO L87 Difference]: Start difference. First operand 1163 states and 3823 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:40,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:40,479 INFO L93 Difference]: Finished difference Result 1612 states and 5118 transitions. [2021-06-05 04:54:40,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:54:40,479 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:54:40,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:40,481 INFO L225 Difference]: With dead ends: 1612 [2021-06-05 04:54:40,481 INFO L226 Difference]: Without dead ends: 1560 [2021-06-05 04:54:40,482 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 583.8ms TimeCoverageRelationStatistics Valid=157, Invalid=713, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:54:40,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1560 states. [2021-06-05 04:54:40,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1560 to 1137. [2021-06-05 04:54:40,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1137 states, 1136 states have (on average 3.273767605633803) internal successors, (3719), 1136 states have internal predecessors, (3719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:40,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1137 states to 1137 states and 3719 transitions. [2021-06-05 04:54:40,494 INFO L78 Accepts]: Start accepts. Automaton has 1137 states and 3719 transitions. Word has length 24 [2021-06-05 04:54:40,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:40,494 INFO L482 AbstractCegarLoop]: Abstraction has 1137 states and 3719 transitions. [2021-06-05 04:54:40,494 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:40,494 INFO L276 IsEmpty]: Start isEmpty. Operand 1137 states and 3719 transitions. [2021-06-05 04:54:40,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:54:40,495 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:40,495 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:40,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 357 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7759 [2021-06-05 04:54:40,696 INFO L430 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:40,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:40,696 INFO L82 PathProgramCache]: Analyzing trace with hash 252674682, now seen corresponding path program 356 times [2021-06-05 04:54:40,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:40,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530909984] [2021-06-05 04:54:40,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:40,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:40,793 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:54:40,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:40,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530909984] [2021-06-05 04:54:40,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530909984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:40,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006843797] [2021-06-05 04:54:40,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:54:40,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:54:40,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:54:40,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 04:54:40,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:54:41,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:54:41,016 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:41,080 INFO L628 ElimStorePlain]: treesize reduction 29, result has 71.8 percent of original size [2021-06-05 04:54:41,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:54:41,083 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:41,112 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:54:41,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:54:41,116 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:41,144 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:54:41,144 INFO L518 ElimStorePlain]: Eliminatee ends_with_6 vanished before elimination [2021-06-05 04:54:41,146 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 04:54:41,146 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:107, output treesize:59 [2021-06-05 04:54:41,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:54:41,207 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:41,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:41,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:54:41,211 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:41,254 INFO L628 ElimStorePlain]: treesize reduction 23, result has 67.6 percent of original size [2021-06-05 04:54:41,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:54:41,257 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:41,274 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:54:41,275 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:54:41,275 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:99, output treesize:26 [2021-06-05 04:54:41,354 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:54:41,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006843797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:41,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:54:41,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 04:54:41,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499041505] [2021-06-05 04:54:41,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:54:41,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:41,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:54:41,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:54:41,355 INFO L87 Difference]: Start difference. First operand 1137 states and 3719 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:42,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:42,624 INFO L93 Difference]: Finished difference Result 1825 states and 5709 transitions. [2021-06-05 04:54:42,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 04:54:42,624 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:54:42,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:42,626 INFO L225 Difference]: With dead ends: 1825 [2021-06-05 04:54:42,626 INFO L226 Difference]: Without dead ends: 1684 [2021-06-05 04:54:42,626 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 1011.0ms TimeCoverageRelationStatistics Valid=214, Invalid=1508, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 04:54:42,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1684 states. [2021-06-05 04:54:42,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1684 to 1146. [2021-06-05 04:54:42,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1146 states, 1145 states have (on average 3.2995633187772926) internal successors, (3778), 1145 states have internal predecessors, (3778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:42,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1146 states to 1146 states and 3778 transitions. [2021-06-05 04:54:42,639 INFO L78 Accepts]: Start accepts. Automaton has 1146 states and 3778 transitions. Word has length 24 [2021-06-05 04:54:42,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:42,639 INFO L482 AbstractCegarLoop]: Abstraction has 1146 states and 3778 transitions. [2021-06-05 04:54:42,639 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:42,639 INFO L276 IsEmpty]: Start isEmpty. Operand 1146 states and 3778 transitions. [2021-06-05 04:54:42,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:54:42,640 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:42,640 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:42,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 358 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7829 [2021-06-05 04:54:42,841 INFO L430 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:42,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:42,841 INFO L82 PathProgramCache]: Analyzing trace with hash -591717378, now seen corresponding path program 357 times [2021-06-05 04:54:42,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:42,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627596789] [2021-06-05 04:54:42,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:42,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:42,927 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:54:42,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:42,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627596789] [2021-06-05 04:54:42,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627596789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:42,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634893649] [2021-06-05 04:54:42,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:54:43,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:54:43,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:54:43,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 04:54:43,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:54:43,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:54:43,170 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:43,258 INFO L628 ElimStorePlain]: treesize reduction 58, result has 64.2 percent of original size [2021-06-05 04:54:43,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:54:43,261 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:43,340 INFO L628 ElimStorePlain]: treesize reduction 4, result has 96.0 percent of original size [2021-06-05 04:54:43,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:54:43,343 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:43,403 INFO L628 ElimStorePlain]: treesize reduction 22, result has 76.3 percent of original size [2021-06-05 04:54:43,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:54:43,406 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:43,434 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:54:43,436 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 04:54:43,437 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:165, output treesize:59 [2021-06-05 04:54:43,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:54:43,506 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:43,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:54:43,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:54:43,509 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:43,556 INFO L628 ElimStorePlain]: treesize reduction 40, result has 54.0 percent of original size [2021-06-05 04:54:43,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:54:43,559 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:54:43,576 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:54:43,577 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:54:43,577 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:99, output treesize:26 [2021-06-05 04:54:43,656 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:43,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634893649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:43,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:54:43,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 04:54:43,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011422390] [2021-06-05 04:54:43,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:54:43,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:43,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:54:43,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:54:43,657 INFO L87 Difference]: Start difference. First operand 1146 states and 3778 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:45,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:45,060 INFO L93 Difference]: Finished difference Result 1665 states and 5212 transitions. [2021-06-05 04:54:45,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 04:54:45,060 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:54:45,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:45,062 INFO L225 Difference]: With dead ends: 1665 [2021-06-05 04:54:45,062 INFO L226 Difference]: Without dead ends: 1518 [2021-06-05 04:54:45,062 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 1117.8ms TimeCoverageRelationStatistics Valid=272, Invalid=1708, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 04:54:45,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1518 states. [2021-06-05 04:54:45,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1518 to 1069. [2021-06-05 04:54:45,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1069 states, 1068 states have (on average 3.25) internal successors, (3471), 1068 states have internal predecessors, (3471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:45,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1069 states to 1069 states and 3471 transitions. [2021-06-05 04:54:45,074 INFO L78 Accepts]: Start accepts. Automaton has 1069 states and 3471 transitions. Word has length 24 [2021-06-05 04:54:45,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:45,074 INFO L482 AbstractCegarLoop]: Abstraction has 1069 states and 3471 transitions. [2021-06-05 04:54:45,074 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:45,074 INFO L276 IsEmpty]: Start isEmpty. Operand 1069 states and 3471 transitions. [2021-06-05 04:54:45,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:54:45,075 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:45,075 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:45,275 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7847 [2021-06-05 04:54:45,275 INFO L430 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:45,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:45,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1468889190, now seen corresponding path program 358 times [2021-06-05 04:54:45,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:45,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116737212] [2021-06-05 04:54:45,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:45,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:45,366 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:45,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:45,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116737212] [2021-06-05 04:54:45,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116737212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:45,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446445259] [2021-06-05 04:54:45,366 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:54:45,489 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:54:45,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:54:45,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:54:45,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:54:45,757 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:45,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446445259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:45,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:54:45,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 04:54:45,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576862725] [2021-06-05 04:54:45,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:54:45,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:45,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:54:45,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:54:45,758 INFO L87 Difference]: Start difference. First operand 1069 states and 3471 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:48,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:48,744 INFO L93 Difference]: Finished difference Result 2034 states and 6206 transitions. [2021-06-05 04:54:48,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-06-05 04:54:48,744 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:54:48,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:48,747 INFO L225 Difference]: With dead ends: 2034 [2021-06-05 04:54:48,747 INFO L226 Difference]: Without dead ends: 1956 [2021-06-05 04:54:48,747 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3037 ImplicationChecksByTransitivity, 1865.7ms TimeCoverageRelationStatistics Valid=782, Invalid=8148, Unknown=0, NotChecked=0, Total=8930 [2021-06-05 04:54:48,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1956 states. [2021-06-05 04:54:48,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1956 to 1101. [2021-06-05 04:54:48,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1101 states, 1100 states have (on average 3.2636363636363637) internal successors, (3590), 1100 states have internal predecessors, (3590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:48,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1101 states to 1101 states and 3590 transitions. [2021-06-05 04:54:48,761 INFO L78 Accepts]: Start accepts. Automaton has 1101 states and 3590 transitions. Word has length 25 [2021-06-05 04:54:48,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:48,761 INFO L482 AbstractCegarLoop]: Abstraction has 1101 states and 3590 transitions. [2021-06-05 04:54:48,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:48,762 INFO L276 IsEmpty]: Start isEmpty. Operand 1101 states and 3590 transitions. [2021-06-05 04:54:48,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:54:48,763 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:48,763 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:48,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7875,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:54:48,963 INFO L430 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:48,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:48,963 INFO L82 PathProgramCache]: Analyzing trace with hash 195955482, now seen corresponding path program 359 times [2021-06-05 04:54:48,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:48,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695304754] [2021-06-05 04:54:48,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:48,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:49,048 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:49,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:49,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695304754] [2021-06-05 04:54:49,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695304754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:49,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701795210] [2021-06-05 04:54:49,049 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:54:49,173 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:54:49,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:54:49,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:54:49,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:54:49,651 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:49,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701795210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:49,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:54:49,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 04:54:49,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548614438] [2021-06-05 04:54:49,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:54:49,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:49,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:54:49,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:54:49,652 INFO L87 Difference]: Start difference. First operand 1101 states and 3590 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:51,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:51,997 INFO L93 Difference]: Finished difference Result 1986 states and 6129 transitions. [2021-06-05 04:54:51,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 04:54:51,997 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:54:51,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:52,000 INFO L225 Difference]: With dead ends: 1986 [2021-06-05 04:54:52,000 INFO L226 Difference]: Without dead ends: 1908 [2021-06-05 04:54:52,000 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1719 ImplicationChecksByTransitivity, 1187.9ms TimeCoverageRelationStatistics Valid=457, Invalid=4945, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 04:54:52,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1908 states. [2021-06-05 04:54:52,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1908 to 1096. [2021-06-05 04:54:52,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1096 states, 1095 states have (on average 3.2831050228310503) internal successors, (3595), 1095 states have internal predecessors, (3595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:52,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1096 states to 1096 states and 3595 transitions. [2021-06-05 04:54:52,015 INFO L78 Accepts]: Start accepts. Automaton has 1096 states and 3595 transitions. Word has length 25 [2021-06-05 04:54:52,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:52,015 INFO L482 AbstractCegarLoop]: Abstraction has 1096 states and 3595 transitions. [2021-06-05 04:54:52,015 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:52,015 INFO L276 IsEmpty]: Start isEmpty. Operand 1096 states and 3595 transitions. [2021-06-05 04:54:52,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:54:52,016 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:52,016 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:52,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7884 [2021-06-05 04:54:52,217 INFO L430 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:52,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:52,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1381037462, now seen corresponding path program 360 times [2021-06-05 04:54:52,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:52,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666782601] [2021-06-05 04:54:52,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:52,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:52,305 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:52,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:52,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666782601] [2021-06-05 04:54:52,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666782601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:52,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583846129] [2021-06-05 04:54:52,306 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:54:52,430 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:54:52,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:54:52,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:54:52,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:54:52,783 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:52,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583846129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:52,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:54:52,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 04:54:52,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576194890] [2021-06-05 04:54:52,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:54:52,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:52,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:54:52,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:54:52,784 INFO L87 Difference]: Start difference. First operand 1096 states and 3595 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:54,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:54,877 INFO L93 Difference]: Finished difference Result 2064 states and 6370 transitions. [2021-06-05 04:54:54,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 04:54:54,877 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:54:54,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:54,880 INFO L225 Difference]: With dead ends: 2064 [2021-06-05 04:54:54,880 INFO L226 Difference]: Without dead ends: 2012 [2021-06-05 04:54:54,880 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1866 ImplicationChecksByTransitivity, 1206.0ms TimeCoverageRelationStatistics Valid=593, Invalid=5259, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 04:54:54,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2012 states. [2021-06-05 04:54:54,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2012 to 1064. [2021-06-05 04:54:54,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1064 states, 1063 states have (on average 3.3029162746942617) internal successors, (3511), 1063 states have internal predecessors, (3511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:54,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1064 states to 1064 states and 3511 transitions. [2021-06-05 04:54:54,894 INFO L78 Accepts]: Start accepts. Automaton has 1064 states and 3511 transitions. Word has length 25 [2021-06-05 04:54:54,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:54,894 INFO L482 AbstractCegarLoop]: Abstraction has 1064 states and 3511 transitions. [2021-06-05 04:54:54,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:54,895 INFO L276 IsEmpty]: Start isEmpty. Operand 1064 states and 3511 transitions. [2021-06-05 04:54:54,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:54:54,896 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:54,896 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:55,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 362 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7982 [2021-06-05 04:54:55,096 INFO L430 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:55,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:55,096 INFO L82 PathProgramCache]: Analyzing trace with hash 496440448, now seen corresponding path program 361 times [2021-06-05 04:54:55,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:55,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581778552] [2021-06-05 04:54:55,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:55,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:55,183 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:55,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:55,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581778552] [2021-06-05 04:54:55,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581778552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:55,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127179695] [2021-06-05 04:54:55,183 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:54:55,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:55,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:54:55,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:54:55,563 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:55,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127179695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:55,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:54:55,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 04:54:55,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461684806] [2021-06-05 04:54:55,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:54:55,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:55,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:54:55,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:54:55,564 INFO L87 Difference]: Start difference. First operand 1064 states and 3511 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:57,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:57,006 INFO L93 Difference]: Finished difference Result 1617 states and 5059 transitions. [2021-06-05 04:54:57,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 04:54:57,006 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:54:57,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:57,008 INFO L225 Difference]: With dead ends: 1617 [2021-06-05 04:54:57,008 INFO L226 Difference]: Without dead ends: 1468 [2021-06-05 04:54:57,009 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1153 ImplicationChecksByTransitivity, 842.2ms TimeCoverageRelationStatistics Valid=331, Invalid=3451, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 04:54:57,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1468 states. [2021-06-05 04:54:57,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1468 to 1074. [2021-06-05 04:54:57,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1074 states, 1073 states have (on average 3.302889095992544) internal successors, (3544), 1073 states have internal predecessors, (3544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:57,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1074 states to 1074 states and 3544 transitions. [2021-06-05 04:54:57,021 INFO L78 Accepts]: Start accepts. Automaton has 1074 states and 3544 transitions. Word has length 25 [2021-06-05 04:54:57,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:57,021 INFO L482 AbstractCegarLoop]: Abstraction has 1074 states and 3544 transitions. [2021-06-05 04:54:57,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:57,021 INFO L276 IsEmpty]: Start isEmpty. Operand 1074 states and 3544 transitions. [2021-06-05 04:54:57,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:54:57,022 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:57,022 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:57,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 363 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8017 [2021-06-05 04:54:57,222 INFO L430 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:57,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:57,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1193889788, now seen corresponding path program 362 times [2021-06-05 04:54:57,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:57,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421379300] [2021-06-05 04:54:57,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:57,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:57,320 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:57,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:57,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421379300] [2021-06-05 04:54:57,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421379300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:57,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318133619] [2021-06-05 04:54:57,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:54:57,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:54:57,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:54:57,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:54:57,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:54:57,702 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:57,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318133619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:57,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:54:57,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 04:54:57,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513105327] [2021-06-05 04:54:57,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:54:57,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:57,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:54:57,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:54:57,703 INFO L87 Difference]: Start difference. First operand 1074 states and 3544 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:59,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:59,322 INFO L93 Difference]: Finished difference Result 1700 states and 5327 transitions. [2021-06-05 04:54:59,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 04:54:59,322 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:54:59,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:59,325 INFO L225 Difference]: With dead ends: 1700 [2021-06-05 04:54:59,325 INFO L226 Difference]: Without dead ends: 1579 [2021-06-05 04:54:59,325 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1506 ImplicationChecksByTransitivity, 1113.6ms TimeCoverageRelationStatistics Valid=409, Invalid=4283, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 04:54:59,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1579 states. [2021-06-05 04:54:59,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1579 to 1087. [2021-06-05 04:54:59,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1087 states, 1086 states have (on average 3.303867403314917) internal successors, (3588), 1086 states have internal predecessors, (3588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:59,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1087 states to 1087 states and 3588 transitions. [2021-06-05 04:54:59,337 INFO L78 Accepts]: Start accepts. Automaton has 1087 states and 3588 transitions. Word has length 25 [2021-06-05 04:54:59,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:59,337 INFO L482 AbstractCegarLoop]: Abstraction has 1087 states and 3588 transitions. [2021-06-05 04:54:59,337 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:59,337 INFO L276 IsEmpty]: Start isEmpty. Operand 1087 states and 3588 transitions. [2021-06-05 04:54:59,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:54:59,338 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:59,338 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:59,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8029 [2021-06-05 04:54:59,539 INFO L430 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:59,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:59,539 INFO L82 PathProgramCache]: Analyzing trace with hash -723274496, now seen corresponding path program 363 times [2021-06-05 04:54:59,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:59,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860832307] [2021-06-05 04:54:59,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:59,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:59,634 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:59,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:59,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860832307] [2021-06-05 04:54:59,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860832307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:59,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212312164] [2021-06-05 04:54:59,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:54:59,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:54:59,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:54:59,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:54:59,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:54:59,997 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:59,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212312164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:59,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:54:59,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 04:54:59,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65315317] [2021-06-05 04:54:59,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:54:59,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:59,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:54:59,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:54:59,998 INFO L87 Difference]: Start difference. First operand 1087 states and 3588 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:02,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:02,180 INFO L93 Difference]: Finished difference Result 1756 states and 5467 transitions. [2021-06-05 04:55:02,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 04:55:02,180 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:55:02,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:02,182 INFO L225 Difference]: With dead ends: 1756 [2021-06-05 04:55:02,182 INFO L226 Difference]: Without dead ends: 1678 [2021-06-05 04:55:02,183 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1879 ImplicationChecksByTransitivity, 1564.9ms TimeCoverageRelationStatistics Valid=641, Invalid=5365, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 04:55:02,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1678 states. [2021-06-05 04:55:02,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1678 to 1088. [2021-06-05 04:55:02,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1088 states, 1087 states have (on average 3.3045078196872124) internal successors, (3592), 1087 states have internal predecessors, (3592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:02,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1088 states to 1088 states and 3592 transitions. [2021-06-05 04:55:02,196 INFO L78 Accepts]: Start accepts. Automaton has 1088 states and 3592 transitions. Word has length 25 [2021-06-05 04:55:02,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:02,196 INFO L482 AbstractCegarLoop]: Abstraction has 1088 states and 3592 transitions. [2021-06-05 04:55:02,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:02,196 INFO L276 IsEmpty]: Start isEmpty. Operand 1088 states and 3592 transitions. [2021-06-05 04:55:02,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:55:02,197 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:02,197 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:02,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 365 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8047 [2021-06-05 04:55:02,397 INFO L430 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:02,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:02,398 INFO L82 PathProgramCache]: Analyzing trace with hash 461807484, now seen corresponding path program 364 times [2021-06-05 04:55:02,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:02,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700433880] [2021-06-05 04:55:02,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:02,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:02,496 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:02,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:02,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700433880] [2021-06-05 04:55:02,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700433880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:02,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740676199] [2021-06-05 04:55:02,497 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:02,621 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:55:02,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:02,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:55:02,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:02,888 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:02,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740676199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:02,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:02,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 04:55:02,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916635977] [2021-06-05 04:55:02,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:55:02,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:02,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:55:02,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:55:02,888 INFO L87 Difference]: Start difference. First operand 1088 states and 3592 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:04,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:04,315 INFO L93 Difference]: Finished difference Result 1606 states and 5071 transitions. [2021-06-05 04:55:04,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 04:55:04,315 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:55:04,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:04,318 INFO L225 Difference]: With dead ends: 1606 [2021-06-05 04:55:04,318 INFO L226 Difference]: Without dead ends: 1554 [2021-06-05 04:55:04,318 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1116 ImplicationChecksByTransitivity, 978.6ms TimeCoverageRelationStatistics Valid=500, Invalid=3406, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 04:55:04,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1554 states. [2021-06-05 04:55:04,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1554 to 1064. [2021-06-05 04:55:04,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1064 states, 1063 states have (on average 3.303857008466604) internal successors, (3512), 1063 states have internal predecessors, (3512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:04,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1064 states to 1064 states and 3512 transitions. [2021-06-05 04:55:04,330 INFO L78 Accepts]: Start accepts. Automaton has 1064 states and 3512 transitions. Word has length 25 [2021-06-05 04:55:04,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:04,331 INFO L482 AbstractCegarLoop]: Abstraction has 1064 states and 3512 transitions. [2021-06-05 04:55:04,331 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:04,331 INFO L276 IsEmpty]: Start isEmpty. Operand 1064 states and 3512 transitions. [2021-06-05 04:55:04,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:55:04,332 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:04,332 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:04,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8060,366 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:04,549 INFO L430 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:04,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:04,549 INFO L82 PathProgramCache]: Analyzing trace with hash 387650504, now seen corresponding path program 365 times [2021-06-05 04:55:04,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:04,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037899778] [2021-06-05 04:55:04,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:04,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:04,631 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:04,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:04,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037899778] [2021-06-05 04:55:04,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037899778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:04,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066003949] [2021-06-05 04:55:04,631 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:04,756 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:55:04,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:04,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:55:04,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:05,005 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:05,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066003949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:05,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:05,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 04:55:05,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965031934] [2021-06-05 04:55:05,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:55:05,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:05,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:55:05,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:55:05,006 INFO L87 Difference]: Start difference. First operand 1064 states and 3512 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:06,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:06,461 INFO L93 Difference]: Finished difference Result 1593 states and 4983 transitions. [2021-06-05 04:55:06,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 04:55:06,462 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:55:06,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:06,464 INFO L225 Difference]: With dead ends: 1593 [2021-06-05 04:55:06,464 INFO L226 Difference]: Without dead ends: 1472 [2021-06-05 04:55:06,464 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1221 ImplicationChecksByTransitivity, 882.6ms TimeCoverageRelationStatistics Valid=354, Invalid=3552, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 04:55:06,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1472 states. [2021-06-05 04:55:06,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1472 to 1064. [2021-06-05 04:55:06,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1064 states, 1063 states have (on average 3.2925682031984946) internal successors, (3500), 1063 states have internal predecessors, (3500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:06,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1064 states to 1064 states and 3500 transitions. [2021-06-05 04:55:06,476 INFO L78 Accepts]: Start accepts. Automaton has 1064 states and 3500 transitions. Word has length 25 [2021-06-05 04:55:06,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:06,476 INFO L482 AbstractCegarLoop]: Abstraction has 1064 states and 3500 transitions. [2021-06-05 04:55:06,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:06,476 INFO L276 IsEmpty]: Start isEmpty. Operand 1064 states and 3500 transitions. [2021-06-05 04:55:06,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:55:06,477 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:06,477 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:06,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8079,367 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:06,681 INFO L430 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:06,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:06,681 INFO L82 PathProgramCache]: Analyzing trace with hash -344431800, now seen corresponding path program 366 times [2021-06-05 04:55:06,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:06,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877080776] [2021-06-05 04:55:06,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:06,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:06,789 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:06,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:06,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877080776] [2021-06-05 04:55:06,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877080776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:06,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439010163] [2021-06-05 04:55:06,789 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:06,947 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:55:06,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:06,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:55:06,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:07,208 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:07,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439010163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:07,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:07,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 04:55:07,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803272016] [2021-06-05 04:55:07,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:55:07,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:07,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:55:07,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:55:07,210 INFO L87 Difference]: Start difference. First operand 1064 states and 3500 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:08,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:08,580 INFO L93 Difference]: Finished difference Result 1555 states and 4863 transitions. [2021-06-05 04:55:08,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 04:55:08,580 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:55:08,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:08,582 INFO L225 Difference]: With dead ends: 1555 [2021-06-05 04:55:08,582 INFO L226 Difference]: Without dead ends: 1503 [2021-06-05 04:55:08,582 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1219 ImplicationChecksByTransitivity, 1025.3ms TimeCoverageRelationStatistics Valid=496, Invalid=3536, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 04:55:08,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1503 states. [2021-06-05 04:55:08,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1503 to 1025. [2021-06-05 04:55:08,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1025 states, 1024 states have (on average 3.265625) internal successors, (3344), 1024 states have internal predecessors, (3344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:08,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1025 states to 1025 states and 3344 transitions. [2021-06-05 04:55:08,594 INFO L78 Accepts]: Start accepts. Automaton has 1025 states and 3344 transitions. Word has length 25 [2021-06-05 04:55:08,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:08,594 INFO L482 AbstractCegarLoop]: Abstraction has 1025 states and 3344 transitions. [2021-06-05 04:55:08,594 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:08,594 INFO L276 IsEmpty]: Start isEmpty. Operand 1025 states and 3344 transitions. [2021-06-05 04:55:08,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:55:08,596 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:08,596 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:08,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8092,368 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:08,797 INFO L430 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:08,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:08,797 INFO L82 PathProgramCache]: Analyzing trace with hash 142687432, now seen corresponding path program 367 times [2021-06-05 04:55:08,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:08,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144773601] [2021-06-05 04:55:08,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:08,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:08,881 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:08,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:08,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144773601] [2021-06-05 04:55:08,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144773601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:08,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63117653] [2021-06-05 04:55:08,881 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:09,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:09,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:55:09,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:09,242 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:09,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63117653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:09,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:09,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 04:55:09,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767552424] [2021-06-05 04:55:09,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:55:09,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:09,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:55:09,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:55:09,243 INFO L87 Difference]: Start difference. First operand 1025 states and 3344 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:10,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:10,807 INFO L93 Difference]: Finished difference Result 1634 states and 5077 transitions. [2021-06-05 04:55:10,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 04:55:10,808 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:55:10,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:10,811 INFO L225 Difference]: With dead ends: 1634 [2021-06-05 04:55:10,811 INFO L226 Difference]: Without dead ends: 1582 [2021-06-05 04:55:10,811 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1446 ImplicationChecksByTransitivity, 938.8ms TimeCoverageRelationStatistics Valid=488, Invalid=4068, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 04:55:10,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1582 states. [2021-06-05 04:55:10,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1582 to 928. [2021-06-05 04:55:10,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 928 states, 927 states have (on average 3.236245954692557) internal successors, (3000), 927 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:10,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 3000 transitions. [2021-06-05 04:55:10,824 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 3000 transitions. Word has length 25 [2021-06-05 04:55:10,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:10,824 INFO L482 AbstractCegarLoop]: Abstraction has 928 states and 3000 transitions. [2021-06-05 04:55:10,824 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:10,824 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 3000 transitions. [2021-06-05 04:55:10,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:55:10,825 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:10,825 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:11,026 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8109,369 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:11,026 INFO L430 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:11,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:11,026 INFO L82 PathProgramCache]: Analyzing trace with hash -720949964, now seen corresponding path program 368 times [2021-06-05 04:55:11,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:11,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169357911] [2021-06-05 04:55:11,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:11,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:11,124 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:11,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:11,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169357911] [2021-06-05 04:55:11,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169357911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:11,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165102788] [2021-06-05 04:55:11,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:11,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:55:11,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:11,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:55:11,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:11,485 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:11,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165102788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:11,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:11,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 04:55:11,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244376051] [2021-06-05 04:55:11,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:55:11,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:11,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:55:11,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:55:11,487 INFO L87 Difference]: Start difference. First operand 928 states and 3000 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:12,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:12,928 INFO L93 Difference]: Finished difference Result 1353 states and 4151 transitions. [2021-06-05 04:55:12,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 04:55:12,929 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:55:12,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:12,930 INFO L225 Difference]: With dead ends: 1353 [2021-06-05 04:55:12,930 INFO L226 Difference]: Without dead ends: 1204 [2021-06-05 04:55:12,931 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 752.0ms TimeCoverageRelationStatistics Valid=344, Invalid=2962, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 04:55:12,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1204 states. [2021-06-05 04:55:12,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1204 to 934. [2021-06-05 04:55:12,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 933 states have (on average 3.2293676312968915) internal successors, (3013), 933 states have internal predecessors, (3013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:12,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 3013 transitions. [2021-06-05 04:55:12,941 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 3013 transitions. Word has length 25 [2021-06-05 04:55:12,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:12,941 INFO L482 AbstractCegarLoop]: Abstraction has 934 states and 3013 transitions. [2021-06-05 04:55:12,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:12,942 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 3013 transitions. [2021-06-05 04:55:12,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:55:12,942 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:12,943 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:13,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 370 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8115 [2021-06-05 04:55:13,143 INFO L430 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:13,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:13,143 INFO L82 PathProgramCache]: Analyzing trace with hash -23500624, now seen corresponding path program 369 times [2021-06-05 04:55:13,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:13,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138692648] [2021-06-05 04:55:13,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:13,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:13,245 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:13,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:13,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138692648] [2021-06-05 04:55:13,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138692648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:13,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835383192] [2021-06-05 04:55:13,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:13,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:55:13,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:13,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:55:13,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:13,601 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:13,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835383192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:13,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:13,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 04:55:13,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698738913] [2021-06-05 04:55:13,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:55:13,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:13,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:55:13,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:55:13,602 INFO L87 Difference]: Start difference. First operand 934 states and 3013 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:14,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:14,978 INFO L93 Difference]: Finished difference Result 1438 states and 4422 transitions. [2021-06-05 04:55:14,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 04:55:14,978 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:55:14,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:14,980 INFO L225 Difference]: With dead ends: 1438 [2021-06-05 04:55:14,980 INFO L226 Difference]: Without dead ends: 1317 [2021-06-05 04:55:14,981 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1073 ImplicationChecksByTransitivity, 1041.0ms TimeCoverageRelationStatistics Valid=363, Invalid=3177, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 04:55:14,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1317 states. [2021-06-05 04:55:14,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1317 to 945. [2021-06-05 04:55:14,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 945 states, 944 states have (on average 3.2288135593220337) internal successors, (3048), 944 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:14,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 945 states to 945 states and 3048 transitions. [2021-06-05 04:55:14,991 INFO L78 Accepts]: Start accepts. Automaton has 945 states and 3048 transitions. Word has length 25 [2021-06-05 04:55:14,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:14,991 INFO L482 AbstractCegarLoop]: Abstraction has 945 states and 3048 transitions. [2021-06-05 04:55:14,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:14,991 INFO L276 IsEmpty]: Start isEmpty. Operand 945 states and 3048 transitions. [2021-06-05 04:55:14,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:55:14,992 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:14,992 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:15,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8131 [2021-06-05 04:55:15,193 INFO L430 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:15,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:15,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1940664908, now seen corresponding path program 370 times [2021-06-05 04:55:15,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:15,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692883119] [2021-06-05 04:55:15,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:15,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:15,292 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:15,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:15,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692883119] [2021-06-05 04:55:15,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692883119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:15,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821278183] [2021-06-05 04:55:15,292 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:15,417 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:55:15,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:15,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:55:15,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:15,657 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:15,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821278183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:15,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:15,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 04:55:15,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228642863] [2021-06-05 04:55:15,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:55:15,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:15,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:55:15,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:55:15,658 INFO L87 Difference]: Start difference. First operand 945 states and 3048 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:17,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:17,641 INFO L93 Difference]: Finished difference Result 1649 states and 5064 transitions. [2021-06-05 04:55:17,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 04:55:17,642 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:55:17,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:17,644 INFO L225 Difference]: With dead ends: 1649 [2021-06-05 04:55:17,644 INFO L226 Difference]: Without dead ends: 1571 [2021-06-05 04:55:17,644 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1989 ImplicationChecksByTransitivity, 1573.0ms TimeCoverageRelationStatistics Valid=658, Invalid=5348, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 04:55:17,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1571 states. [2021-06-05 04:55:17,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1571 to 988. [2021-06-05 04:55:17,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 988 states, 987 states have (on average 3.243161094224924) internal successors, (3201), 987 states have internal predecessors, (3201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:17,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 988 states to 988 states and 3201 transitions. [2021-06-05 04:55:17,656 INFO L78 Accepts]: Start accepts. Automaton has 988 states and 3201 transitions. Word has length 25 [2021-06-05 04:55:17,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:17,656 INFO L482 AbstractCegarLoop]: Abstraction has 988 states and 3201 transitions. [2021-06-05 04:55:17,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:17,656 INFO L276 IsEmpty]: Start isEmpty. Operand 988 states and 3201 transitions. [2021-06-05 04:55:17,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:55:17,657 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:17,657 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:17,858 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8139,372 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:17,858 INFO L430 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:17,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:17,864 INFO L82 PathProgramCache]: Analyzing trace with hash -755582928, now seen corresponding path program 371 times [2021-06-05 04:55:17,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:17,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860583823] [2021-06-05 04:55:17,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:17,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:17,981 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:17,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:17,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860583823] [2021-06-05 04:55:17,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860583823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:17,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704434619] [2021-06-05 04:55:17,981 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:18,109 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:55:18,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:18,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:55:18,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:18,370 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:18,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704434619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:18,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:18,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 04:55:18,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363375292] [2021-06-05 04:55:18,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:55:18,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:18,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:55:18,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:55:18,371 INFO L87 Difference]: Start difference. First operand 988 states and 3201 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:19,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:19,721 INFO L93 Difference]: Finished difference Result 1507 states and 4689 transitions. [2021-06-05 04:55:19,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 04:55:19,721 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:55:19,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:19,723 INFO L225 Difference]: With dead ends: 1507 [2021-06-05 04:55:19,723 INFO L226 Difference]: Without dead ends: 1455 [2021-06-05 04:55:19,724 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1437 ImplicationChecksByTransitivity, 1052.5ms TimeCoverageRelationStatistics Valid=559, Invalid=3997, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 04:55:19,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1455 states. [2021-06-05 04:55:19,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1455 to 920. [2021-06-05 04:55:19,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 920 states, 919 states have (on average 3.2241566920565834) internal successors, (2963), 919 states have internal predecessors, (2963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:19,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 920 states to 920 states and 2963 transitions. [2021-06-05 04:55:19,734 INFO L78 Accepts]: Start accepts. Automaton has 920 states and 2963 transitions. Word has length 25 [2021-06-05 04:55:19,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:19,735 INFO L482 AbstractCegarLoop]: Abstraction has 920 states and 2963 transitions. [2021-06-05 04:55:19,735 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:19,735 INFO L276 IsEmpty]: Start isEmpty. Operand 920 states and 2963 transitions. [2021-06-05 04:55:19,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:55:19,736 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:19,736 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:19,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 373 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8152 [2021-06-05 04:55:19,936 INFO L430 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:19,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:19,936 INFO L82 PathProgramCache]: Analyzing trace with hash -829739908, now seen corresponding path program 372 times [2021-06-05 04:55:19,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:19,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676173502] [2021-06-05 04:55:19,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:19,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:20,021 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:20,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:20,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676173502] [2021-06-05 04:55:20,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676173502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:20,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695226440] [2021-06-05 04:55:20,021 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:20,154 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:55:20,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:20,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:55:20,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:20,394 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:20,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695226440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:20,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:20,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 04:55:20,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630385016] [2021-06-05 04:55:20,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:55:20,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:20,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:55:20,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:55:20,395 INFO L87 Difference]: Start difference. First operand 920 states and 2963 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:21,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:21,759 INFO L93 Difference]: Finished difference Result 1457 states and 4481 transitions. [2021-06-05 04:55:21,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 04:55:21,759 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:55:21,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:21,761 INFO L225 Difference]: With dead ends: 1457 [2021-06-05 04:55:21,761 INFO L226 Difference]: Without dead ends: 1336 [2021-06-05 04:55:21,761 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1040 ImplicationChecksByTransitivity, 832.9ms TimeCoverageRelationStatistics Valid=349, Invalid=3073, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 04:55:21,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1336 states. [2021-06-05 04:55:21,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1336 to 947. [2021-06-05 04:55:21,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 947 states, 946 states have (on average 3.2283298097251585) internal successors, (3054), 946 states have internal predecessors, (3054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:21,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 947 states to 947 states and 3054 transitions. [2021-06-05 04:55:21,772 INFO L78 Accepts]: Start accepts. Automaton has 947 states and 3054 transitions. Word has length 25 [2021-06-05 04:55:21,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:21,772 INFO L482 AbstractCegarLoop]: Abstraction has 947 states and 3054 transitions. [2021-06-05 04:55:21,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:21,772 INFO L276 IsEmpty]: Start isEmpty. Operand 947 states and 3054 transitions. [2021-06-05 04:55:21,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:55:21,773 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:21,773 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:21,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8169 [2021-06-05 04:55:21,974 INFO L430 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:21,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:21,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1548063104, now seen corresponding path program 373 times [2021-06-05 04:55:21,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:21,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258136202] [2021-06-05 04:55:21,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:21,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:22,070 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:22,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:22,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258136202] [2021-06-05 04:55:22,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258136202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:22,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728328870] [2021-06-05 04:55:22,071 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:22,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:22,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:55:22,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:22,421 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:22,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728328870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:22,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:22,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 04:55:22,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112379772] [2021-06-05 04:55:22,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:55:22,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:22,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:55:22,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:55:22,422 INFO L87 Difference]: Start difference. First operand 947 states and 3054 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:24,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:24,438 INFO L93 Difference]: Finished difference Result 1637 states and 5024 transitions. [2021-06-05 04:55:24,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 04:55:24,438 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:55:24,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:24,440 INFO L225 Difference]: With dead ends: 1637 [2021-06-05 04:55:24,440 INFO L226 Difference]: Without dead ends: 1559 [2021-06-05 04:55:24,440 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2064 ImplicationChecksByTransitivity, 1564.7ms TimeCoverageRelationStatistics Valid=674, Invalid=5488, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 04:55:24,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1559 states. [2021-06-05 04:55:24,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1559 to 991. [2021-06-05 04:55:24,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 991 states, 990 states have (on average 3.2444444444444445) internal successors, (3212), 990 states have internal predecessors, (3212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:24,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 991 states to 991 states and 3212 transitions. [2021-06-05 04:55:24,453 INFO L78 Accepts]: Start accepts. Automaton has 991 states and 3212 transitions. Word has length 25 [2021-06-05 04:55:24,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:24,453 INFO L482 AbstractCegarLoop]: Abstraction has 991 states and 3212 transitions. [2021-06-05 04:55:24,453 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:24,453 INFO L276 IsEmpty]: Start isEmpty. Operand 991 states and 3212 transitions. [2021-06-05 04:55:24,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:55:24,454 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:24,454 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:24,655 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8186,375 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:24,655 INFO L430 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:24,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:24,655 INFO L82 PathProgramCache]: Analyzing trace with hash -1561822212, now seen corresponding path program 374 times [2021-06-05 04:55:24,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:24,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628801342] [2021-06-05 04:55:24,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:24,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:24,747 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:24,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:24,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628801342] [2021-06-05 04:55:24,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628801342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:24,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833174337] [2021-06-05 04:55:24,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:24,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:55:24,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:24,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:55:24,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:25,118 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:25,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833174337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:25,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:25,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 04:55:25,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463655281] [2021-06-05 04:55:25,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:55:25,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:25,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:55:25,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:55:25,119 INFO L87 Difference]: Start difference. First operand 991 states and 3212 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:26,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:26,479 INFO L93 Difference]: Finished difference Result 1495 states and 4649 transitions. [2021-06-05 04:55:26,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 04:55:26,479 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:55:26,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:26,481 INFO L225 Difference]: With dead ends: 1495 [2021-06-05 04:55:26,481 INFO L226 Difference]: Without dead ends: 1443 [2021-06-05 04:55:26,482 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 1018.9ms TimeCoverageRelationStatistics Valid=565, Invalid=4127, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 04:55:26,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1443 states. [2021-06-05 04:55:26,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1443 to 935. [2021-06-05 04:55:26,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 935 states, 934 states have (on average 3.226980728051392) internal successors, (3014), 934 states have internal predecessors, (3014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:26,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 935 states to 935 states and 3014 transitions. [2021-06-05 04:55:26,493 INFO L78 Accepts]: Start accepts. Automaton has 935 states and 3014 transitions. Word has length 25 [2021-06-05 04:55:26,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:26,493 INFO L482 AbstractCegarLoop]: Abstraction has 935 states and 3014 transitions. [2021-06-05 04:55:26,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:26,493 INFO L276 IsEmpty]: Start isEmpty. Operand 935 states and 3014 transitions. [2021-06-05 04:55:26,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:55:26,494 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:26,494 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:26,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8195 [2021-06-05 04:55:26,695 INFO L430 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:26,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:26,695 INFO L82 PathProgramCache]: Analyzing trace with hash 275129396, now seen corresponding path program 375 times [2021-06-05 04:55:26,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:26,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286904127] [2021-06-05 04:55:26,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:26,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:26,803 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:26,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:26,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286904127] [2021-06-05 04:55:26,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286904127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:26,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509486356] [2021-06-05 04:55:26,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:26,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:55:26,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:26,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:55:26,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:27,227 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:27,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509486356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:27,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:27,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 04:55:27,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525655801] [2021-06-05 04:55:27,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:55:27,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:27,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:55:27,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:55:27,228 INFO L87 Difference]: Start difference. First operand 935 states and 3014 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:28,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:28,746 INFO L93 Difference]: Finished difference Result 1836 states and 5621 transitions. [2021-06-05 04:55:28,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 04:55:28,746 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:55:28,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:28,749 INFO L225 Difference]: With dead ends: 1836 [2021-06-05 04:55:28,749 INFO L226 Difference]: Without dead ends: 1758 [2021-06-05 04:55:28,749 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1388 ImplicationChecksByTransitivity, 1017.4ms TimeCoverageRelationStatistics Valid=441, Invalid=3849, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 04:55:28,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1758 states. [2021-06-05 04:55:28,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1758 to 1005. [2021-06-05 04:55:28,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1005 states, 1004 states have (on average 3.25796812749004) internal successors, (3271), 1004 states have internal predecessors, (3271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:28,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1005 states to 1005 states and 3271 transitions. [2021-06-05 04:55:28,762 INFO L78 Accepts]: Start accepts. Automaton has 1005 states and 3271 transitions. Word has length 25 [2021-06-05 04:55:28,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:28,762 INFO L482 AbstractCegarLoop]: Abstraction has 1005 states and 3271 transitions. [2021-06-05 04:55:28,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:28,762 INFO L276 IsEmpty]: Start isEmpty. Operand 1005 states and 3271 transitions. [2021-06-05 04:55:28,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:55:28,763 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:28,763 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:28,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 377 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8214 [2021-06-05 04:55:28,963 INFO L430 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:28,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:28,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1460211376, now seen corresponding path program 376 times [2021-06-05 04:55:28,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:28,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532365048] [2021-06-05 04:55:28,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:28,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:29,053 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:29,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:29,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532365048] [2021-06-05 04:55:29,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532365048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:29,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445060867] [2021-06-05 04:55:29,054 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:29,180 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:55:29,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:29,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:55:29,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:29,534 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:29,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445060867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:29,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:29,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 04:55:29,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967583207] [2021-06-05 04:55:29,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:55:29,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:29,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:55:29,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:55:29,535 INFO L87 Difference]: Start difference. First operand 1005 states and 3271 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:30,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:30,843 INFO L93 Difference]: Finished difference Result 1911 states and 5874 transitions. [2021-06-05 04:55:30,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 04:55:30,843 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:55:30,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:30,846 INFO L225 Difference]: With dead ends: 1911 [2021-06-05 04:55:30,846 INFO L226 Difference]: Without dead ends: 1859 [2021-06-05 04:55:30,846 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1578 ImplicationChecksByTransitivity, 898.6ms TimeCoverageRelationStatistics Valid=534, Invalid=4296, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 04:55:30,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1859 states. [2021-06-05 04:55:30,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1859 to 992. [2021-06-05 04:55:30,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 992 states, 991 states have (on average 3.256306760847629) internal successors, (3227), 991 states have internal predecessors, (3227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:30,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 3227 transitions. [2021-06-05 04:55:30,859 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 3227 transitions. Word has length 25 [2021-06-05 04:55:30,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:30,860 INFO L482 AbstractCegarLoop]: Abstraction has 992 states and 3227 transitions. [2021-06-05 04:55:30,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:30,860 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 3227 transitions. [2021-06-05 04:55:30,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:55:30,861 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:30,861 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:31,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 378 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8242 [2021-06-05 04:55:31,061 INFO L430 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:31,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:31,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1074702980, now seen corresponding path program 377 times [2021-06-05 04:55:31,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:31,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794492765] [2021-06-05 04:55:31,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:31,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:31,153 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:31,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:31,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794492765] [2021-06-05 04:55:31,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794492765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:31,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241018779] [2021-06-05 04:55:31,153 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:31,280 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:55:31,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:31,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:55:31,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:31,514 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:31,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241018779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:31,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:31,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 04:55:31,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037853871] [2021-06-05 04:55:31,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:55:31,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:31,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:55:31,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:55:31,514 INFO L87 Difference]: Start difference. First operand 992 states and 3227 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:33,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:33,261 INFO L93 Difference]: Finished difference Result 1655 states and 5144 transitions. [2021-06-05 04:55:33,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 04:55:33,261 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:55:33,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:33,263 INFO L225 Difference]: With dead ends: 1655 [2021-06-05 04:55:33,263 INFO L226 Difference]: Without dead ends: 1603 [2021-06-05 04:55:33,264 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1781 ImplicationChecksByTransitivity, 936.8ms TimeCoverageRelationStatistics Valid=518, Invalid=4738, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 04:55:33,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1603 states. [2021-06-05 04:55:33,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1603 to 906. [2021-06-05 04:55:33,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 906 states, 905 states have (on average 3.2220994475138123) internal successors, (2916), 905 states have internal predecessors, (2916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:33,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 906 states to 906 states and 2916 transitions. [2021-06-05 04:55:33,275 INFO L78 Accepts]: Start accepts. Automaton has 906 states and 2916 transitions. Word has length 25 [2021-06-05 04:55:33,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:33,275 INFO L482 AbstractCegarLoop]: Abstraction has 906 states and 2916 transitions. [2021-06-05 04:55:33,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:33,275 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states and 2916 transitions. [2021-06-05 04:55:33,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:55:33,276 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:33,276 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:33,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8287,379 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:33,477 INFO L430 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:33,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:33,477 INFO L82 PathProgramCache]: Analyzing trace with hash -53353936, now seen corresponding path program 378 times [2021-06-05 04:55:33,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:33,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950253165] [2021-06-05 04:55:33,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:33,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:33,559 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:33,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:33,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950253165] [2021-06-05 04:55:33,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950253165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:33,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719677935] [2021-06-05 04:55:33,559 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:33,687 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:55:33,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:33,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:55:33,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:33,927 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:33,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719677935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:33,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:33,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 04:55:33,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999660738] [2021-06-05 04:55:33,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:55:33,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:33,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:55:33,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:55:33,928 INFO L87 Difference]: Start difference. First operand 906 states and 2916 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:35,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:35,283 INFO L93 Difference]: Finished difference Result 1471 states and 4521 transitions. [2021-06-05 04:55:35,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 04:55:35,283 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:55:35,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:35,285 INFO L225 Difference]: With dead ends: 1471 [2021-06-05 04:55:35,285 INFO L226 Difference]: Without dead ends: 1350 [2021-06-05 04:55:35,285 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1202 ImplicationChecksByTransitivity, 845.5ms TimeCoverageRelationStatistics Valid=370, Invalid=3536, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 04:55:35,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1350 states. [2021-06-05 04:55:35,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1350 to 948. [2021-06-05 04:55:35,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 948 states, 947 states have (on average 3.2270327349524814) internal successors, (3056), 947 states have internal predecessors, (3056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:35,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 948 states to 948 states and 3056 transitions. [2021-06-05 04:55:35,296 INFO L78 Accepts]: Start accepts. Automaton has 948 states and 3056 transitions. Word has length 25 [2021-06-05 04:55:35,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:35,296 INFO L482 AbstractCegarLoop]: Abstraction has 948 states and 3056 transitions. [2021-06-05 04:55:35,296 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:35,296 INFO L276 IsEmpty]: Start isEmpty. Operand 948 states and 3056 transitions. [2021-06-05 04:55:35,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:55:35,297 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:35,297 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:35,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8293,380 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:35,498 INFO L430 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:35,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:35,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1970518220, now seen corresponding path program 379 times [2021-06-05 04:55:35,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:35,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510739923] [2021-06-05 04:55:35,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:35,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:35,588 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:35,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:35,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510739923] [2021-06-05 04:55:35,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510739923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:35,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487341126] [2021-06-05 04:55:35,588 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:35,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:35,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:55:35,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:35,959 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:35,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487341126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:35,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:35,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 04:55:35,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176753443] [2021-06-05 04:55:35,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:55:35,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:35,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:55:35,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:55:35,960 INFO L87 Difference]: Start difference. First operand 948 states and 3056 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:38,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:38,081 INFO L93 Difference]: Finished difference Result 1694 states and 5196 transitions. [2021-06-05 04:55:38,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 04:55:38,081 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:55:38,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:38,084 INFO L225 Difference]: With dead ends: 1694 [2021-06-05 04:55:38,084 INFO L226 Difference]: Without dead ends: 1616 [2021-06-05 04:55:38,084 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2281 ImplicationChecksByTransitivity, 1622.5ms TimeCoverageRelationStatistics Valid=741, Invalid=6065, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 04:55:38,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1616 states. [2021-06-05 04:55:38,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1616 to 992. [2021-06-05 04:55:38,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 992 states, 991 states have (on average 3.2431886982845612) internal successors, (3214), 991 states have internal predecessors, (3214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:38,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 3214 transitions. [2021-06-05 04:55:38,096 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 3214 transitions. Word has length 25 [2021-06-05 04:55:38,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:38,096 INFO L482 AbstractCegarLoop]: Abstraction has 992 states and 3214 transitions. [2021-06-05 04:55:38,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:38,096 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 3214 transitions. [2021-06-05 04:55:38,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:55:38,097 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:38,097 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:38,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 381 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8310 [2021-06-05 04:55:38,298 INFO L430 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:38,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:38,298 INFO L82 PathProgramCache]: Analyzing trace with hash -785436240, now seen corresponding path program 380 times [2021-06-05 04:55:38,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:38,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283525309] [2021-06-05 04:55:38,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:38,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:38,394 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:38,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:38,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283525309] [2021-06-05 04:55:38,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283525309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:38,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266847746] [2021-06-05 04:55:38,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:38,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:55:38,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:38,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:55:38,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:38,770 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:38,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266847746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:38,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:38,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 04:55:38,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937692657] [2021-06-05 04:55:38,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:55:38,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:38,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:55:38,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:55:38,771 INFO L87 Difference]: Start difference. First operand 992 states and 3214 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:40,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:40,108 INFO L93 Difference]: Finished difference Result 1552 states and 4821 transitions. [2021-06-05 04:55:40,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 04:55:40,109 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:55:40,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:40,111 INFO L225 Difference]: With dead ends: 1552 [2021-06-05 04:55:40,111 INFO L226 Difference]: Without dead ends: 1500 [2021-06-05 04:55:40,111 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1703 ImplicationChecksByTransitivity, 981.4ms TimeCoverageRelationStatistics Valid=640, Invalid=4616, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 04:55:40,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1500 states. [2021-06-05 04:55:40,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1500 to 936. [2021-06-05 04:55:40,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 936 states, 935 states have (on average 3.225668449197861) internal successors, (3016), 935 states have internal predecessors, (3016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:40,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 936 states to 936 states and 3016 transitions. [2021-06-05 04:55:40,125 INFO L78 Accepts]: Start accepts. Automaton has 936 states and 3016 transitions. Word has length 25 [2021-06-05 04:55:40,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:40,125 INFO L482 AbstractCegarLoop]: Abstraction has 936 states and 3016 transitions. [2021-06-05 04:55:40,125 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:40,125 INFO L276 IsEmpty]: Start isEmpty. Operand 936 states and 3016 transitions. [2021-06-05 04:55:40,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:55:40,126 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:40,126 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:40,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8328,382 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:40,327 INFO L430 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:40,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:40,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1051515368, now seen corresponding path program 381 times [2021-06-05 04:55:40,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:40,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404148768] [2021-06-05 04:55:40,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:40,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:40,410 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:40,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:40,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404148768] [2021-06-05 04:55:40,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404148768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:40,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991152546] [2021-06-05 04:55:40,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:40,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:55:40,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:40,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:55:40,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:41,027 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:41,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991152546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:41,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:41,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 04:55:41,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990370926] [2021-06-05 04:55:41,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:55:41,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:41,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:55:41,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:55:41,028 INFO L87 Difference]: Start difference. First operand 936 states and 3016 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:42,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:42,931 INFO L93 Difference]: Finished difference Result 1792 states and 5483 transitions. [2021-06-05 04:55:42,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 04:55:42,931 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:55:42,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:42,933 INFO L225 Difference]: With dead ends: 1792 [2021-06-05 04:55:42,934 INFO L226 Difference]: Without dead ends: 1714 [2021-06-05 04:55:42,934 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 46 SyntacticMatches, 5 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1902 ImplicationChecksByTransitivity, 1454.6ms TimeCoverageRelationStatistics Valid=560, Invalid=4696, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 04:55:42,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1714 states. [2021-06-05 04:55:42,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1714 to 1006. [2021-06-05 04:55:42,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1006 states, 1005 states have (on average 3.256716417910448) internal successors, (3273), 1005 states have internal predecessors, (3273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:42,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1006 states to 1006 states and 3273 transitions. [2021-06-05 04:55:42,946 INFO L78 Accepts]: Start accepts. Automaton has 1006 states and 3273 transitions. Word has length 25 [2021-06-05 04:55:42,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:42,946 INFO L482 AbstractCegarLoop]: Abstraction has 1006 states and 3273 transitions. [2021-06-05 04:55:42,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:42,947 INFO L276 IsEmpty]: Start isEmpty. Operand 1006 states and 3273 transitions. [2021-06-05 04:55:42,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:55:42,948 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:42,948 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:43,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 383 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8342 [2021-06-05 04:55:43,148 INFO L430 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:43,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:43,148 INFO L82 PathProgramCache]: Analyzing trace with hash -2058369948, now seen corresponding path program 382 times [2021-06-05 04:55:43,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:43,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805208739] [2021-06-05 04:55:43,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:43,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:43,236 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:43,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:43,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805208739] [2021-06-05 04:55:43,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805208739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:43,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983549020] [2021-06-05 04:55:43,236 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:43,370 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:55:43,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:43,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:55:43,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:43,689 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:43,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983549020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:43,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:43,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 04:55:43,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139552658] [2021-06-05 04:55:43,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:55:43,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:43,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:55:43,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:55:43,690 INFO L87 Difference]: Start difference. First operand 1006 states and 3273 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:45,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:45,341 INFO L93 Difference]: Finished difference Result 1838 states and 5649 transitions. [2021-06-05 04:55:45,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 04:55:45,342 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:55:45,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:45,344 INFO L225 Difference]: With dead ends: 1838 [2021-06-05 04:55:45,344 INFO L226 Difference]: Without dead ends: 1786 [2021-06-05 04:55:45,345 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1870 ImplicationChecksByTransitivity, 1260.2ms TimeCoverageRelationStatistics Valid=686, Invalid=5014, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 04:55:45,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2021-06-05 04:55:45,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 993. [2021-06-05 04:55:45,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 993 states, 992 states have (on average 3.255040322580645) internal successors, (3229), 992 states have internal predecessors, (3229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:45,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 993 states to 993 states and 3229 transitions. [2021-06-05 04:55:45,358 INFO L78 Accepts]: Start accepts. Automaton has 993 states and 3229 transitions. Word has length 25 [2021-06-05 04:55:45,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:45,358 INFO L482 AbstractCegarLoop]: Abstraction has 993 states and 3229 transitions. [2021-06-05 04:55:45,358 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:45,359 INFO L276 IsEmpty]: Start isEmpty. Operand 993 states and 3229 transitions. [2021-06-05 04:55:45,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:55:45,359 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:45,360 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:45,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 384 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8455 [2021-06-05 04:55:45,560 INFO L430 AbstractCegarLoop]: === Iteration 400 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:45,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:45,560 INFO L82 PathProgramCache]: Analyzing trace with hash -298317008, now seen corresponding path program 383 times [2021-06-05 04:55:45,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:45,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741268410] [2021-06-05 04:55:45,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:45,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:45,641 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:45,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:45,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741268410] [2021-06-05 04:55:45,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741268410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:45,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568900118] [2021-06-05 04:55:45,642 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:45,781 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:55:45,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:45,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:55:45,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:46,017 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:46,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568900118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:46,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:46,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 04:55:46,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414953078] [2021-06-05 04:55:46,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:55:46,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:46,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:55:46,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:55:46,018 INFO L87 Difference]: Start difference. First operand 993 states and 3229 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:47,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:47,413 INFO L93 Difference]: Finished difference Result 1639 states and 5093 transitions. [2021-06-05 04:55:47,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 04:55:47,414 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:55:47,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:47,416 INFO L225 Difference]: With dead ends: 1639 [2021-06-05 04:55:47,416 INFO L226 Difference]: Without dead ends: 1587 [2021-06-05 04:55:47,416 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1622 ImplicationChecksByTransitivity, 938.9ms TimeCoverageRelationStatistics Valid=507, Invalid=4463, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 04:55:47,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1587 states. [2021-06-05 04:55:47,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1587 to 921. [2021-06-05 04:55:47,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 921 states, 920 states have (on average 3.222826086956522) internal successors, (2965), 920 states have internal predecessors, (2965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:47,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 921 states to 921 states and 2965 transitions. [2021-06-05 04:55:47,428 INFO L78 Accepts]: Start accepts. Automaton has 921 states and 2965 transitions. Word has length 25 [2021-06-05 04:55:47,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:47,428 INFO L482 AbstractCegarLoop]: Abstraction has 921 states and 2965 transitions. [2021-06-05 04:55:47,428 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:47,428 INFO L276 IsEmpty]: Start isEmpty. Operand 921 states and 2965 transitions. [2021-06-05 04:55:47,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:55:47,429 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:47,429 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:47,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8485,385 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:47,631 INFO L430 AbstractCegarLoop]: === Iteration 401 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:47,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:47,632 INFO L82 PathProgramCache]: Analyzing trace with hash 245276084, now seen corresponding path program 384 times [2021-06-05 04:55:47,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:47,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139405362] [2021-06-05 04:55:47,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:47,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:47,729 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:47,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:47,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139405362] [2021-06-05 04:55:47,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139405362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:47,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441695893] [2021-06-05 04:55:47,729 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:47,859 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:55:47,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:47,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:55:47,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:48,215 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:48,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441695893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:48,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:48,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 04:55:48,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494080823] [2021-06-05 04:55:48,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:55:48,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:48,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:55:48,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:55:48,216 INFO L87 Difference]: Start difference. First operand 921 states and 2965 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:50,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:50,126 INFO L93 Difference]: Finished difference Result 1809 states and 5531 transitions. [2021-06-05 04:55:50,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 04:55:50,126 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:55:50,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:50,129 INFO L225 Difference]: With dead ends: 1809 [2021-06-05 04:55:50,129 INFO L226 Difference]: Without dead ends: 1731 [2021-06-05 04:55:50,129 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1399 ImplicationChecksByTransitivity, 1401.3ms TimeCoverageRelationStatistics Valid=524, Invalid=4032, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 04:55:50,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1731 states. [2021-06-05 04:55:50,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1731 to 1020. [2021-06-05 04:55:50,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1020 states, 1019 states have (on average 3.2688910696761533) internal successors, (3331), 1019 states have internal predecessors, (3331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:50,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1020 states to 1020 states and 3331 transitions. [2021-06-05 04:55:50,141 INFO L78 Accepts]: Start accepts. Automaton has 1020 states and 3331 transitions. Word has length 25 [2021-06-05 04:55:50,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:50,141 INFO L482 AbstractCegarLoop]: Abstraction has 1020 states and 3331 transitions. [2021-06-05 04:55:50,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:50,141 INFO L276 IsEmpty]: Start isEmpty. Operand 1020 states and 3331 transitions. [2021-06-05 04:55:50,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:55:50,142 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:50,142 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:50,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8491,386 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:50,343 INFO L430 AbstractCegarLoop]: === Iteration 402 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:50,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:50,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1430358064, now seen corresponding path program 385 times [2021-06-05 04:55:50,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:50,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973502856] [2021-06-05 04:55:50,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:50,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:50,433 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:50,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:50,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973502856] [2021-06-05 04:55:50,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973502856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:50,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254925109] [2021-06-05 04:55:50,434 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:50,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:50,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:55:50,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:51,111 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:51,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254925109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:51,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:51,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 04:55:51,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246750609] [2021-06-05 04:55:51,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:55:51,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:51,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:55:51,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:55:51,111 INFO L87 Difference]: Start difference. First operand 1020 states and 3331 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:52,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:52,990 INFO L93 Difference]: Finished difference Result 1883 states and 5773 transitions. [2021-06-05 04:55:52,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 04:55:52,990 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:55:52,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:52,992 INFO L225 Difference]: With dead ends: 1883 [2021-06-05 04:55:52,992 INFO L226 Difference]: Without dead ends: 1831 [2021-06-05 04:55:52,993 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1875 ImplicationChecksByTransitivity, 1389.6ms TimeCoverageRelationStatistics Valid=725, Invalid=5127, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 04:55:52,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1831 states. [2021-06-05 04:55:53,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1831 to 1007. [2021-06-05 04:55:53,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1007 states, 1006 states have (on average 3.2673956262425445) internal successors, (3287), 1006 states have internal predecessors, (3287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:53,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1007 states to 1007 states and 3287 transitions. [2021-06-05 04:55:53,006 INFO L78 Accepts]: Start accepts. Automaton has 1007 states and 3287 transitions. Word has length 25 [2021-06-05 04:55:53,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:53,006 INFO L482 AbstractCegarLoop]: Abstraction has 1007 states and 3287 transitions. [2021-06-05 04:55:53,006 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:53,006 INFO L276 IsEmpty]: Start isEmpty. Operand 1007 states and 3287 transitions. [2021-06-05 04:55:53,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:55:53,007 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:53,007 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:53,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 387 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8531 [2021-06-05 04:55:53,207 INFO L430 AbstractCegarLoop]: === Iteration 403 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:53,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:53,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1104556292, now seen corresponding path program 386 times [2021-06-05 04:55:53,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:53,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77920731] [2021-06-05 04:55:53,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:53,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:53,293 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:53,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:53,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77920731] [2021-06-05 04:55:53,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77920731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:53,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083746115] [2021-06-05 04:55:53,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:53,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:55:53,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:53,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:55:53,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:53,673 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:53,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083746115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:53,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:53,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 04:55:53,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601582904] [2021-06-05 04:55:53,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:55:53,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:53,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:55:53,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:55:53,674 INFO L87 Difference]: Start difference. First operand 1007 states and 3287 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:55,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:55,490 INFO L93 Difference]: Finished difference Result 1638 states and 5108 transitions. [2021-06-05 04:55:55,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 04:55:55,490 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:55:55,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:55,492 INFO L225 Difference]: With dead ends: 1638 [2021-06-05 04:55:55,492 INFO L226 Difference]: Without dead ends: 1586 [2021-06-05 04:55:55,492 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1669 ImplicationChecksByTransitivity, 1229.0ms TimeCoverageRelationStatistics Valid=580, Invalid=4532, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 04:55:55,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1586 states. [2021-06-05 04:55:55,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1586 to 992. [2021-06-05 04:55:55,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 992 states, 991 states have (on average 3.265388496468214) internal successors, (3236), 991 states have internal predecessors, (3236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:55,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 3236 transitions. [2021-06-05 04:55:55,504 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 3236 transitions. Word has length 25 [2021-06-05 04:55:55,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:55,504 INFO L482 AbstractCegarLoop]: Abstraction has 992 states and 3236 transitions. [2021-06-05 04:55:55,504 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:55,505 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 3236 transitions. [2021-06-05 04:55:55,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:55:55,506 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:55,506 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:55,706 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 388 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8663 [2021-06-05 04:55:55,706 INFO L430 AbstractCegarLoop]: === Iteration 404 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:55,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:55,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1917477296, now seen corresponding path program 387 times [2021-06-05 04:55:55,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:55,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976423799] [2021-06-05 04:55:55,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:55,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:55,790 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:55,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:55,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976423799] [2021-06-05 04:55:55,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976423799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:55,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838326491] [2021-06-05 04:55:55,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:55,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:55:55,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:55,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:55:55,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:56,160 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:56,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838326491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:56,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:56,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 04:55:56,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116783706] [2021-06-05 04:55:56,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:55:56,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:56,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:55:56,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:55:56,161 INFO L87 Difference]: Start difference. First operand 992 states and 3236 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:57,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:57,866 INFO L93 Difference]: Finished difference Result 1573 states and 4896 transitions. [2021-06-05 04:55:57,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 04:55:57,867 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:55:57,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:57,868 INFO L225 Difference]: With dead ends: 1573 [2021-06-05 04:55:57,868 INFO L226 Difference]: Without dead ends: 1521 [2021-06-05 04:55:57,869 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1528 ImplicationChecksByTransitivity, 986.3ms TimeCoverageRelationStatistics Valid=509, Invalid=4321, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 04:55:57,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1521 states. [2021-06-05 04:55:57,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1521 to 893. [2021-06-05 04:55:57,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 3.2208520179372195) internal successors, (2873), 892 states have internal predecessors, (2873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:57,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 2873 transitions. [2021-06-05 04:55:57,880 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 2873 transitions. Word has length 25 [2021-06-05 04:55:57,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:57,880 INFO L482 AbstractCegarLoop]: Abstraction has 893 states and 2873 transitions. [2021-06-05 04:55:57,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:57,880 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 2873 transitions. [2021-06-05 04:55:57,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:55:57,881 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:57,881 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:58,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8669,389 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:58,082 INFO L430 AbstractCegarLoop]: === Iteration 405 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:58,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:58,082 INFO L82 PathProgramCache]: Analyzing trace with hash -458628254, now seen corresponding path program 388 times [2021-06-05 04:55:58,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:58,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681117015] [2021-06-05 04:55:58,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:58,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:58,165 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:58,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:58,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681117015] [2021-06-05 04:55:58,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681117015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:58,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821848219] [2021-06-05 04:55:58,165 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:58,293 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:55:58,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:58,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:55:58,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:58,551 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:58,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821848219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:58,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:58,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 04:55:58,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942247509] [2021-06-05 04:55:58,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:55:58,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:58,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:55:58,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:55:58,552 INFO L87 Difference]: Start difference. First operand 893 states and 2873 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:00,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:00,512 INFO L93 Difference]: Finished difference Result 1474 states and 4523 transitions. [2021-06-05 04:56:00,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 04:56:00,513 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:56:00,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:00,514 INFO L225 Difference]: With dead ends: 1474 [2021-06-05 04:56:00,515 INFO L226 Difference]: Without dead ends: 1353 [2021-06-05 04:56:00,515 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1817 ImplicationChecksByTransitivity, 1162.1ms TimeCoverageRelationStatistics Valid=525, Invalid=5175, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 04:56:00,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1353 states. [2021-06-05 04:56:00,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1353 to 897. [2021-06-05 04:56:00,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 896 states have (on average 3.2154017857142856) internal successors, (2881), 896 states have internal predecessors, (2881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:00,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 2881 transitions. [2021-06-05 04:56:00,525 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 2881 transitions. Word has length 25 [2021-06-05 04:56:00,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:00,525 INFO L482 AbstractCegarLoop]: Abstraction has 897 states and 2881 transitions. [2021-06-05 04:56:00,525 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:00,525 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 2881 transitions. [2021-06-05 04:56:00,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:56:00,526 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:00,526 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:00,726 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 390 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8675 [2021-06-05 04:56:00,726 INFO L430 AbstractCegarLoop]: === Iteration 406 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:00,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:00,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1919174758, now seen corresponding path program 389 times [2021-06-05 04:56:00,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:00,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536257884] [2021-06-05 04:56:00,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:00,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:00,816 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:00,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:00,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536257884] [2021-06-05 04:56:00,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536257884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:00,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187679968] [2021-06-05 04:56:00,816 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:00,946 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:56:00,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:00,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:56:00,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:01,179 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:01,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187679968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:01,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:01,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 04:56:01,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474203841] [2021-06-05 04:56:01,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:56:01,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:01,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:56:01,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:56:01,180 INFO L87 Difference]: Start difference. First operand 897 states and 2881 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:03,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:03,657 INFO L93 Difference]: Finished difference Result 1790 states and 5503 transitions. [2021-06-05 04:56:03,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-06-05 04:56:03,657 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:56:03,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:03,660 INFO L225 Difference]: With dead ends: 1790 [2021-06-05 04:56:03,660 INFO L226 Difference]: Without dead ends: 1712 [2021-06-05 04:56:03,660 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2808 ImplicationChecksByTransitivity, 1754.1ms TimeCoverageRelationStatistics Valid=782, Invalid=7408, Unknown=0, NotChecked=0, Total=8190 [2021-06-05 04:56:03,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1712 states. [2021-06-05 04:56:03,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1712 to 938. [2021-06-05 04:56:03,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 938 states, 937 states have (on average 3.2283884738527213) internal successors, (3025), 937 states have internal predecessors, (3025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:03,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 3025 transitions. [2021-06-05 04:56:03,672 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 3025 transitions. Word has length 25 [2021-06-05 04:56:03,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:03,672 INFO L482 AbstractCegarLoop]: Abstraction has 938 states and 3025 transitions. [2021-06-05 04:56:03,672 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:03,672 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 3025 transitions. [2021-06-05 04:56:03,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:56:03,673 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:03,673 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:03,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 391 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8688 [2021-06-05 04:56:03,873 INFO L430 AbstractCegarLoop]: === Iteration 407 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:03,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:03,874 INFO L82 PathProgramCache]: Analyzing trace with hash -1190710558, now seen corresponding path program 390 times [2021-06-05 04:56:03,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:03,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910168185] [2021-06-05 04:56:03,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:03,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:03,966 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:03,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:03,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910168185] [2021-06-05 04:56:03,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910168185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:03,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314977399] [2021-06-05 04:56:03,967 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:04,096 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:56:04,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:04,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:56:04,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:04,358 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:04,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314977399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:04,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:04,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 04:56:04,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170793329] [2021-06-05 04:56:04,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:56:04,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:04,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:56:04,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:56:04,359 INFO L87 Difference]: Start difference. First operand 938 states and 3025 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:06,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:06,268 INFO L93 Difference]: Finished difference Result 1596 states and 4957 transitions. [2021-06-05 04:56:06,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-06-05 04:56:06,268 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:56:06,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:06,270 INFO L225 Difference]: With dead ends: 1596 [2021-06-05 04:56:06,270 INFO L226 Difference]: Without dead ends: 1544 [2021-06-05 04:56:06,271 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2483 ImplicationChecksByTransitivity, 1182.2ms TimeCoverageRelationStatistics Valid=787, Invalid=6523, Unknown=0, NotChecked=0, Total=7310 [2021-06-05 04:56:06,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2021-06-05 04:56:06,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 878. [2021-06-05 04:56:06,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 878 states, 877 states have (on average 3.2052451539338653) internal successors, (2811), 877 states have internal predecessors, (2811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:06,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 2811 transitions. [2021-06-05 04:56:06,282 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 2811 transitions. Word has length 25 [2021-06-05 04:56:06,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:06,282 INFO L482 AbstractCegarLoop]: Abstraction has 878 states and 2811 transitions. [2021-06-05 04:56:06,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:06,282 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 2811 transitions. [2021-06-05 04:56:06,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:56:06,283 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:06,283 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:06,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 392 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8697 [2021-06-05 04:56:06,483 INFO L430 AbstractCegarLoop]: === Iteration 408 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:06,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:06,484 INFO L82 PathProgramCache]: Analyzing trace with hash 646241050, now seen corresponding path program 391 times [2021-06-05 04:56:06,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:06,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130258816] [2021-06-05 04:56:06,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:06,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:06,569 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:06,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:06,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130258816] [2021-06-05 04:56:06,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130258816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:06,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795530265] [2021-06-05 04:56:06,570 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:06,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:06,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:56:06,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:07,061 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:07,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795530265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:07,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:07,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 04:56:07,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288896913] [2021-06-05 04:56:07,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:56:07,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:07,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:56:07,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:56:07,062 INFO L87 Difference]: Start difference. First operand 878 states and 2811 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:09,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:09,624 INFO L93 Difference]: Finished difference Result 1955 states and 5962 transitions. [2021-06-05 04:56:09,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-05 04:56:09,624 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:56:09,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:09,626 INFO L225 Difference]: With dead ends: 1955 [2021-06-05 04:56:09,626 INFO L226 Difference]: Without dead ends: 1877 [2021-06-05 04:56:09,626 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2555 ImplicationChecksByTransitivity, 1680.6ms TimeCoverageRelationStatistics Valid=707, Invalid=6775, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 04:56:09,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1877 states. [2021-06-05 04:56:09,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1877 to 947. [2021-06-05 04:56:09,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 947 states, 946 states have (on average 3.2389006342494713) internal successors, (3064), 946 states have internal predecessors, (3064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:09,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 947 states to 947 states and 3064 transitions. [2021-06-05 04:56:09,638 INFO L78 Accepts]: Start accepts. Automaton has 947 states and 3064 transitions. Word has length 25 [2021-06-05 04:56:09,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:09,638 INFO L482 AbstractCegarLoop]: Abstraction has 947 states and 3064 transitions. [2021-06-05 04:56:09,638 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:09,639 INFO L276 IsEmpty]: Start isEmpty. Operand 947 states and 3064 transitions. [2021-06-05 04:56:09,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:56:09,639 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:09,640 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:09,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8714,393 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:09,840 INFO L430 AbstractCegarLoop]: === Iteration 409 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:09,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:09,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1831323030, now seen corresponding path program 392 times [2021-06-05 04:56:09,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:09,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412846171] [2021-06-05 04:56:09,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:09,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:09,928 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:09,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:09,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412846171] [2021-06-05 04:56:09,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412846171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:09,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505345025] [2021-06-05 04:56:09,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:10,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:56:10,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:10,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:56:10,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:10,401 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:10,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505345025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:10,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:10,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 04:56:10,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669443037] [2021-06-05 04:56:10,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:56:10,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:10,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:56:10,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:56:10,402 INFO L87 Difference]: Start difference. First operand 947 states and 3064 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:12,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:12,629 INFO L93 Difference]: Finished difference Result 2050 states and 6284 transitions. [2021-06-05 04:56:12,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-06-05 04:56:12,629 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:56:12,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:12,632 INFO L225 Difference]: With dead ends: 2050 [2021-06-05 04:56:12,632 INFO L226 Difference]: Without dead ends: 1998 [2021-06-05 04:56:12,633 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3104 ImplicationChecksByTransitivity, 1531.5ms TimeCoverageRelationStatistics Valid=912, Invalid=8018, Unknown=0, NotChecked=0, Total=8930 [2021-06-05 04:56:12,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1998 states. [2021-06-05 04:56:12,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1998 to 934. [2021-06-05 04:56:12,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 933 states have (on average 3.2368703108252945) internal successors, (3020), 933 states have internal predecessors, (3020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:12,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 3020 transitions. [2021-06-05 04:56:12,648 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 3020 transitions. Word has length 25 [2021-06-05 04:56:12,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:12,648 INFO L482 AbstractCegarLoop]: Abstraction has 934 states and 3020 transitions. [2021-06-05 04:56:12,648 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:12,648 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 3020 transitions. [2021-06-05 04:56:12,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:56:12,649 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:12,649 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:12,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8767,394 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:12,849 INFO L430 AbstractCegarLoop]: === Iteration 410 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:12,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:12,850 INFO L82 PathProgramCache]: Analyzing trace with hash -703591326, now seen corresponding path program 393 times [2021-06-05 04:56:12,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:12,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411965135] [2021-06-05 04:56:12,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:12,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:12,932 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:12,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:12,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411965135] [2021-06-05 04:56:12,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411965135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:12,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218789092] [2021-06-05 04:56:12,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:13,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:56:13,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:13,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:56:13,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:13,315 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:13,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218789092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:13,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:13,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 04:56:13,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546931999] [2021-06-05 04:56:13,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:56:13,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:13,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:56:13,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:56:13,316 INFO L87 Difference]: Start difference. First operand 934 states and 3020 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:15,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:15,431 INFO L93 Difference]: Finished difference Result 1714 states and 5308 transitions. [2021-06-05 04:56:15,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-06-05 04:56:15,431 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:56:15,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:15,433 INFO L225 Difference]: With dead ends: 1714 [2021-06-05 04:56:15,433 INFO L226 Difference]: Without dead ends: 1662 [2021-06-05 04:56:15,433 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2270 ImplicationChecksByTransitivity, 1173.1ms TimeCoverageRelationStatistics Valid=646, Invalid=6160, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 04:56:15,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1662 states. [2021-06-05 04:56:15,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1662 to 862. [2021-06-05 04:56:15,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 861 states have (on average 3.2009291521486642) internal successors, (2756), 861 states have internal predecessors, (2756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:15,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 2756 transitions. [2021-06-05 04:56:15,444 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 2756 transitions. Word has length 25 [2021-06-05 04:56:15,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:15,444 INFO L482 AbstractCegarLoop]: Abstraction has 862 states and 2756 transitions. [2021-06-05 04:56:15,444 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:15,445 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 2756 transitions. [2021-06-05 04:56:15,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:56:15,445 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:15,445 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:15,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8809,395 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:15,646 INFO L430 AbstractCegarLoop]: === Iteration 411 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:15,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:15,646 INFO L82 PathProgramCache]: Analyzing trace with hash -159998234, now seen corresponding path program 394 times [2021-06-05 04:56:15,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:15,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373750665] [2021-06-05 04:56:15,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:15,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:15,733 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:15,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:15,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373750665] [2021-06-05 04:56:15,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373750665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:15,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568406758] [2021-06-05 04:56:15,733 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:15,862 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:56:15,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:15,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:56:15,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:16,331 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:16,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568406758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:16,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:16,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 04:56:16,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089735332] [2021-06-05 04:56:16,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:56:16,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:16,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:56:16,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:56:16,332 INFO L87 Difference]: Start difference. First operand 862 states and 2756 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:18,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:18,224 INFO L93 Difference]: Finished difference Result 1736 states and 5285 transitions. [2021-06-05 04:56:18,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 04:56:18,224 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:56:18,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:18,226 INFO L225 Difference]: With dead ends: 1736 [2021-06-05 04:56:18,226 INFO L226 Difference]: Without dead ends: 1658 [2021-06-05 04:56:18,227 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1635 ImplicationChecksByTransitivity, 1172.8ms TimeCoverageRelationStatistics Valid=505, Invalid=4751, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 04:56:18,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1658 states. [2021-06-05 04:56:18,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1658 to 959. [2021-06-05 04:56:18,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 959 states, 958 states have (on average 3.2526096033402925) internal successors, (3116), 958 states have internal predecessors, (3116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:18,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 959 states to 959 states and 3116 transitions. [2021-06-05 04:56:18,239 INFO L78 Accepts]: Start accepts. Automaton has 959 states and 3116 transitions. Word has length 25 [2021-06-05 04:56:18,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:18,239 INFO L482 AbstractCegarLoop]: Abstraction has 959 states and 3116 transitions. [2021-06-05 04:56:18,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:18,239 INFO L276 IsEmpty]: Start isEmpty. Operand 959 states and 3116 transitions. [2021-06-05 04:56:18,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:56:18,240 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:18,240 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:18,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8815,396 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:18,440 INFO L430 AbstractCegarLoop]: === Iteration 412 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:18,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:18,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1025083746, now seen corresponding path program 395 times [2021-06-05 04:56:18,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:18,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326988235] [2021-06-05 04:56:18,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:18,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:18,560 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:18,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:18,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326988235] [2021-06-05 04:56:18,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326988235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:18,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585074104] [2021-06-05 04:56:18,560 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:18,700 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:56:18,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:18,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:56:18,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:19,156 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:19,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585074104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:19,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:19,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 04:56:19,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790276496] [2021-06-05 04:56:19,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:56:19,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:19,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:56:19,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:56:19,157 INFO L87 Difference]: Start difference. First operand 959 states and 3116 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:20,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:20,950 INFO L93 Difference]: Finished difference Result 1641 states and 5003 transitions. [2021-06-05 04:56:20,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 04:56:20,951 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:56:20,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:20,953 INFO L225 Difference]: With dead ends: 1641 [2021-06-05 04:56:20,953 INFO L226 Difference]: Without dead ends: 1589 [2021-06-05 04:56:20,953 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1523 ImplicationChecksByTransitivity, 1039.4ms TimeCoverageRelationStatistics Valid=557, Invalid=4413, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 04:56:20,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1589 states. [2021-06-05 04:56:20,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1589 to 946. [2021-06-05 04:56:20,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 946 states, 945 states have (on average 3.250793650793651) internal successors, (3072), 945 states have internal predecessors, (3072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:20,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 946 states to 946 states and 3072 transitions. [2021-06-05 04:56:20,964 INFO L78 Accepts]: Start accepts. Automaton has 946 states and 3072 transitions. Word has length 25 [2021-06-05 04:56:20,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:20,965 INFO L482 AbstractCegarLoop]: Abstraction has 946 states and 3072 transitions. [2021-06-05 04:56:20,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:20,965 INFO L276 IsEmpty]: Start isEmpty. Operand 946 states and 3072 transitions. [2021-06-05 04:56:20,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:56:20,966 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:20,966 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:21,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8874 [2021-06-05 04:56:21,166 INFO L430 AbstractCegarLoop]: === Iteration 413 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:21,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:21,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1509830610, now seen corresponding path program 396 times [2021-06-05 04:56:21,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:21,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341846622] [2021-06-05 04:56:21,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:21,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:21,253 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:21,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:21,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341846622] [2021-06-05 04:56:21,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341846622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:21,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822038701] [2021-06-05 04:56:21,253 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:21,383 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:56:21,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:21,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:56:21,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:21,652 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:21,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822038701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:21,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:21,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 04:56:21,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945547196] [2021-06-05 04:56:21,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:56:21,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:21,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:56:21,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:56:21,653 INFO L87 Difference]: Start difference. First operand 946 states and 3072 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:23,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:23,465 INFO L93 Difference]: Finished difference Result 1571 states and 4874 transitions. [2021-06-05 04:56:23,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 04:56:23,465 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:56:23,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:23,467 INFO L225 Difference]: With dead ends: 1571 [2021-06-05 04:56:23,467 INFO L226 Difference]: Without dead ends: 1519 [2021-06-05 04:56:23,468 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1506 ImplicationChecksByTransitivity, 971.6ms TimeCoverageRelationStatistics Valid=462, Invalid=4368, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 04:56:23,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1519 states. [2021-06-05 04:56:23,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1519 to 931. [2021-06-05 04:56:23,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 3.2483870967741937) internal successors, (3021), 930 states have internal predecessors, (3021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:23,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 3021 transitions. [2021-06-05 04:56:23,479 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 3021 transitions. Word has length 25 [2021-06-05 04:56:23,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:23,479 INFO L482 AbstractCegarLoop]: Abstraction has 931 states and 3021 transitions. [2021-06-05 04:56:23,479 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:23,479 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 3021 transitions. [2021-06-05 04:56:23,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:56:23,480 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:23,480 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:23,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8933,398 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:23,680 INFO L430 AbstractCegarLoop]: === Iteration 414 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:23,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:23,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1512202978, now seen corresponding path program 397 times [2021-06-05 04:56:23,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:23,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432951725] [2021-06-05 04:56:23,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:23,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:23,764 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:23,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:23,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432951725] [2021-06-05 04:56:23,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432951725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:23,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387365032] [2021-06-05 04:56:23,764 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:23,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:23,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:56:23,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:24,150 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:24,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387365032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:24,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:24,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 04:56:24,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036657815] [2021-06-05 04:56:24,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:56:24,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:24,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:56:24,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:56:24,151 INFO L87 Difference]: Start difference. First operand 931 states and 3021 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:25,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:25,761 INFO L93 Difference]: Finished difference Result 1506 states and 4662 transitions. [2021-06-05 04:56:25,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 04:56:25,761 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:56:25,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:25,763 INFO L225 Difference]: With dead ends: 1506 [2021-06-05 04:56:25,763 INFO L226 Difference]: Without dead ends: 1454 [2021-06-05 04:56:25,764 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1595 ImplicationChecksByTransitivity, 992.2ms TimeCoverageRelationStatistics Valid=512, Invalid=4600, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 04:56:25,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1454 states. [2021-06-05 04:56:25,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1454 to 845. [2021-06-05 04:56:25,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2002369668246446) internal successors, (2701), 844 states have internal predecessors, (2701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:25,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2701 transitions. [2021-06-05 04:56:25,777 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2701 transitions. Word has length 25 [2021-06-05 04:56:25,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:25,777 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2701 transitions. [2021-06-05 04:56:25,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:25,777 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2701 transitions. [2021-06-05 04:56:25,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:56:25,778 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:25,778 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:25,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 399 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8939 [2021-06-05 04:56:25,979 INFO L430 AbstractCegarLoop]: === Iteration 415 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:25,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:25,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1142902924, now seen corresponding path program 398 times [2021-06-05 04:56:25,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:25,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848880789] [2021-06-05 04:56:25,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:25,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:26,065 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:26,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:26,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848880789] [2021-06-05 04:56:26,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848880789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:26,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625036746] [2021-06-05 04:56:26,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:26,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:56:26,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:26,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:56:26,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:26,699 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:26,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625036746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:26,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:26,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 04:56:26,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218513430] [2021-06-05 04:56:26,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:56:26,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:26,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:56:26,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:56:26,700 INFO L87 Difference]: Start difference. First operand 845 states and 2701 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:29,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:29,096 INFO L93 Difference]: Finished difference Result 1597 states and 4791 transitions. [2021-06-05 04:56:29,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-05 04:56:29,097 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:56:29,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:29,099 INFO L225 Difference]: With dead ends: 1597 [2021-06-05 04:56:29,099 INFO L226 Difference]: Without dead ends: 1519 [2021-06-05 04:56:29,099 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1882 ImplicationChecksByTransitivity, 1464.3ms TimeCoverageRelationStatistics Valid=605, Invalid=5401, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 04:56:29,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1519 states. [2021-06-05 04:56:29,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1519 to 878. [2021-06-05 04:56:29,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 878 states, 877 states have (on average 3.1904218928164196) internal successors, (2798), 877 states have internal predecessors, (2798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:29,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 2798 transitions. [2021-06-05 04:56:29,112 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 2798 transitions. Word has length 25 [2021-06-05 04:56:29,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:29,112 INFO L482 AbstractCegarLoop]: Abstraction has 878 states and 2798 transitions. [2021-06-05 04:56:29,112 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:29,112 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 2798 transitions. [2021-06-05 04:56:29,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:56:29,113 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:29,113 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:29,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8945,400 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:29,314 INFO L430 AbstractCegarLoop]: === Iteration 416 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:29,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:29,314 INFO L82 PathProgramCache]: Analyzing trace with hash 42179056, now seen corresponding path program 399 times [2021-06-05 04:56:29,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:29,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125273377] [2021-06-05 04:56:29,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:29,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:29,422 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:29,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:29,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125273377] [2021-06-05 04:56:29,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125273377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:29,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182675154] [2021-06-05 04:56:29,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:29,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:56:29,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:29,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:56:29,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:29,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:56:29,722 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:29,791 INFO L628 ElimStorePlain]: treesize reduction 52, result has 56.3 percent of original size [2021-06-05 04:56:29,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:56:29,795 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:29,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:56:29,798 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:29,852 INFO L628 ElimStorePlain]: treesize reduction 4, result has 93.3 percent of original size [2021-06-05 04:56:29,854 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 04:56:29,854 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:122, output treesize:48 [2021-06-05 04:56:30,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:30,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:30,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:56:30,455 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:30,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:30,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:30,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:56:30,460 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:30,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:30,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:30,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:56:30,465 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:30,468 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:56:30,469 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:30,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:30,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:56:30,473 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:30,602 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2021-06-05 04:56:30,603 INFO L628 ElimStorePlain]: treesize reduction 140, result has 46.6 percent of original size [2021-06-05 04:56:30,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:56:30,607 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:30,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:56:30,610 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:30,664 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:56:30,665 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 04:56:30,665 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 4 variables, input treesize:368, output treesize:78 [2021-06-05 04:56:30,829 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:56:30,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182675154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:30,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:30,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 04:56:30,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362779879] [2021-06-05 04:56:30,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:56:30,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:30,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:56:30,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=374, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:56:30,830 INFO L87 Difference]: Start difference. First operand 878 states and 2798 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:33,663 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2021-06-05 04:56:34,336 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2021-06-05 04:56:34,648 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2021-06-05 04:56:34,882 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 41 [2021-06-05 04:56:35,065 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2021-06-05 04:56:35,603 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 51 [2021-06-05 04:56:35,808 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 58 [2021-06-05 04:56:36,051 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2021-06-05 04:56:36,292 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 57 [2021-06-05 04:56:36,507 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 61 [2021-06-05 04:56:36,685 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 54 [2021-06-05 04:56:36,929 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 45 [2021-06-05 04:56:37,499 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 55 [2021-06-05 04:56:37,752 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2021-06-05 04:56:37,916 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 53 [2021-06-05 04:56:38,114 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 53 [2021-06-05 04:56:38,321 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 61 [2021-06-05 04:56:38,532 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 61 [2021-06-05 04:56:38,680 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 46 [2021-06-05 04:56:39,004 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2021-06-05 04:56:39,314 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2021-06-05 04:56:39,468 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 51 [2021-06-05 04:56:39,662 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 58 [2021-06-05 04:56:40,022 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 57 [2021-06-05 04:56:40,323 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 50 [2021-06-05 04:56:40,561 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 49 [2021-06-05 04:56:40,757 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 56 [2021-06-05 04:56:41,073 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 55 [2021-06-05 04:56:41,462 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 53 [2021-06-05 04:56:41,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:41,491 INFO L93 Difference]: Finished difference Result 2145 states and 6267 transitions. [2021-06-05 04:56:41,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2021-06-05 04:56:41,491 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:56:41,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:41,494 INFO L225 Difference]: With dead ends: 2145 [2021-06-05 04:56:41,494 INFO L226 Difference]: Without dead ends: 1823 [2021-06-05 04:56:41,494 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7443 ImplicationChecksByTransitivity, 9136.9ms TimeCoverageRelationStatistics Valid=1818, Invalid=19062, Unknown=0, NotChecked=0, Total=20880 [2021-06-05 04:56:41,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1823 states. [2021-06-05 04:56:41,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1823 to 1016. [2021-06-05 04:56:41,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1016 states, 1015 states have (on average 3.2) internal successors, (3248), 1015 states have internal predecessors, (3248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:41,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1016 states to 1016 states and 3248 transitions. [2021-06-05 04:56:41,507 INFO L78 Accepts]: Start accepts. Automaton has 1016 states and 3248 transitions. Word has length 25 [2021-06-05 04:56:41,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:41,507 INFO L482 AbstractCegarLoop]: Abstraction has 1016 states and 3248 transitions. [2021-06-05 04:56:41,507 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:41,507 INFO L276 IsEmpty]: Start isEmpty. Operand 1016 states and 3248 transitions. [2021-06-05 04:56:41,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:56:41,508 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:41,508 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:41,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9050,401 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:41,709 INFO L430 AbstractCegarLoop]: === Iteration 417 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:41,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:41,709 INFO L82 PathProgramCache]: Analyzing trace with hash 853194326, now seen corresponding path program 400 times [2021-06-05 04:56:41,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:41,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611568276] [2021-06-05 04:56:41,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:41,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:41,800 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 04:56:41,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:41,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611568276] [2021-06-05 04:56:41,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611568276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:41,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513745627] [2021-06-05 04:56:41,801 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:41,982 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:56:41,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:41,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:56:41,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:42,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:42,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:42,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:56:42,276 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:42,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:56:42,280 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:42,413 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-06-05 04:56:42,413 INFO L628 ElimStorePlain]: treesize reduction 35, result has 79.2 percent of original size [2021-06-05 04:56:42,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:56:42,418 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:42,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:56:42,422 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:42,480 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:56:42,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:56:42,484 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:42,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:56:42,488 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:42,543 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:56:42,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:56:42,547 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:42,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:56:42,605 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: 6 dim-0 vars, and 6 xjuncts. [2021-06-05 04:56:42,605 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 8 variables, input treesize:199, output treesize:114 [2021-06-05 04:56:42,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:56:42,875 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:42,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:42,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:56:42,879 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:42,914 INFO L628 ElimStorePlain]: treesize reduction 35, result has 47.8 percent of original size [2021-06-05 04:56:42,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:56:42,917 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:42,928 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:56:42,929 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:56:42,929 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:79, output treesize:13 [2021-06-05 04:56:42,983 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:42,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513745627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:42,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:42,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-06-05 04:56:42,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772982873] [2021-06-05 04:56:42,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:56:42,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:42,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:56:42,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:56:42,984 INFO L87 Difference]: Start difference. First operand 1016 states and 3248 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:43,792 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 65 [2021-06-05 04:56:43,927 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 66 [2021-06-05 04:56:44,197 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 69 [2021-06-05 04:56:45,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:45,658 INFO L93 Difference]: Finished difference Result 1770 states and 5324 transitions. [2021-06-05 04:56:45,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 04:56:45,658 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:56:45,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:45,660 INFO L225 Difference]: With dead ends: 1770 [2021-06-05 04:56:45,660 INFO L226 Difference]: Without dead ends: 1632 [2021-06-05 04:56:45,661 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 2511.2ms TimeCoverageRelationStatistics Valid=423, Invalid=1833, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 04:56:45,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1632 states. [2021-06-05 04:56:45,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1632 to 1027. [2021-06-05 04:56:45,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1027 states, 1026 states have (on average 3.211500974658869) internal successors, (3295), 1026 states have internal predecessors, (3295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:45,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1027 states to 1027 states and 3295 transitions. [2021-06-05 04:56:45,672 INFO L78 Accepts]: Start accepts. Automaton has 1027 states and 3295 transitions. Word has length 25 [2021-06-05 04:56:45,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:45,672 INFO L482 AbstractCegarLoop]: Abstraction has 1027 states and 3295 transitions. [2021-06-05 04:56:45,672 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:45,672 INFO L276 IsEmpty]: Start isEmpty. Operand 1027 states and 3295 transitions. [2021-06-05 04:56:45,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:56:45,673 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:45,673 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:45,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 402 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9150 [2021-06-05 04:56:45,874 INFO L430 AbstractCegarLoop]: === Iteration 418 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:45,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:45,874 INFO L82 PathProgramCache]: Analyzing trace with hash 561294408, now seen corresponding path program 401 times [2021-06-05 04:56:45,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:45,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526112796] [2021-06-05 04:56:45,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:45,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:45,960 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 04:56:45,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:45,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526112796] [2021-06-05 04:56:45,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526112796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:45,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140533287] [2021-06-05 04:56:45,961 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:46,092 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:56:46,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:46,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:56:46,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:46,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:46,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:46,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:56:46,398 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:46,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:56:46,402 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:46,546 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-06-05 04:56:46,547 INFO L628 ElimStorePlain]: treesize reduction 35, result has 79.2 percent of original size [2021-06-05 04:56:46,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:56:46,551 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:46,612 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:56:46,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:56:46,616 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:46,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:56:46,619 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:46,678 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:56:46,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:56:46,682 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:46,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:56:46,685 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:46,740 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:56:46,744 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: 6 dim-0 vars, and 6 xjuncts. [2021-06-05 04:56:46,744 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 8 variables, input treesize:199, output treesize:114 [2021-06-05 04:56:47,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:56:47,022 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:47,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:47,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:56:47,026 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:47,109 INFO L628 ElimStorePlain]: treesize reduction 78, result has 46.2 percent of original size [2021-06-05 04:56:47,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:56:47,113 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:47,142 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:56:47,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:56:47,145 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:47,173 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:56:47,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:56:47,176 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:47,202 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:56:47,203 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:56:47,203 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:157, output treesize:25 [2021-06-05 04:56:47,289 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:47,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140533287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:47,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:47,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-06-05 04:56:47,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538687413] [2021-06-05 04:56:47,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:56:47,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:47,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:56:47,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:56:47,290 INFO L87 Difference]: Start difference. First operand 1027 states and 3295 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:47,926 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2021-06-05 04:56:48,275 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 65 [2021-06-05 04:56:48,411 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 66 [2021-06-05 04:56:48,623 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 68 [2021-06-05 04:56:48,770 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 69 [2021-06-05 04:56:48,914 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 69 [2021-06-05 04:56:49,063 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 54 [2021-06-05 04:56:49,239 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 65 [2021-06-05 04:56:49,391 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 72 [2021-06-05 04:56:49,541 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 57 [2021-06-05 04:56:49,694 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 54 [2021-06-05 04:56:49,899 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 54 [2021-06-05 04:56:50,055 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 58 [2021-06-05 04:56:50,248 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 57 [2021-06-05 04:56:50,410 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 67 [2021-06-05 04:56:50,622 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 54 [2021-06-05 04:56:50,764 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 50 [2021-06-05 04:56:50,940 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 61 [2021-06-05 04:56:51,090 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 58 [2021-06-05 04:56:51,271 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 70 [2021-06-05 04:56:51,570 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 71 [2021-06-05 04:56:51,713 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 50 [2021-06-05 04:56:51,912 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 61 [2021-06-05 04:56:52,071 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 71 [2021-06-05 04:56:52,536 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 67 [2021-06-05 04:56:52,683 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 66 [2021-06-05 04:56:52,885 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 74 [2021-06-05 04:56:53,531 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 68 [2021-06-05 04:56:53,682 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 66 [2021-06-05 04:56:53,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:53,772 INFO L93 Difference]: Finished difference Result 1975 states and 5843 transitions. [2021-06-05 04:56:53,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 04:56:53,772 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:56:53,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:53,775 INFO L225 Difference]: With dead ends: 1975 [2021-06-05 04:56:53,775 INFO L226 Difference]: Without dead ends: 1756 [2021-06-05 04:56:53,775 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 5948.5ms TimeCoverageRelationStatistics Valid=692, Invalid=3730, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 04:56:53,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1756 states. [2021-06-05 04:56:53,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1756 to 1017. [2021-06-05 04:56:53,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1017 states, 1016 states have (on average 3.2096456692913384) internal successors, (3261), 1016 states have internal predecessors, (3261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:53,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1017 states to 1017 states and 3261 transitions. [2021-06-05 04:56:53,787 INFO L78 Accepts]: Start accepts. Automaton has 1017 states and 3261 transitions. Word has length 25 [2021-06-05 04:56:53,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:53,788 INFO L482 AbstractCegarLoop]: Abstraction has 1017 states and 3261 transitions. [2021-06-05 04:56:53,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:53,788 INFO L276 IsEmpty]: Start isEmpty. Operand 1017 states and 3261 transitions. [2021-06-05 04:56:53,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:56:53,789 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:53,789 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:53,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9178,403 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:53,989 INFO L430 AbstractCegarLoop]: === Iteration 419 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:53,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:53,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1910473976, now seen corresponding path program 402 times [2021-06-05 04:56:53,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:53,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096465108] [2021-06-05 04:56:53,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:53,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:54,069 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:56:54,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:54,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096465108] [2021-06-05 04:56:54,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096465108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:54,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059884687] [2021-06-05 04:56:54,069 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:54,199 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:56:54,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:54,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:56:54,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:54,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:56:54,553 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:54,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:54,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:56:54,557 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:54,682 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-06-05 04:56:54,682 INFO L628 ElimStorePlain]: treesize reduction 29, result has 79.3 percent of original size [2021-06-05 04:56:54,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:56:54,686 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:54,738 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:56:54,741 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 5 xjuncts. [2021-06-05 04:56:54,741 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:152, output treesize:100 [2021-06-05 04:56:54,926 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:54,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059884687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:54,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:54,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-06-05 04:56:54,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975023258] [2021-06-05 04:56:54,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:56:54,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:54,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:56:54,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:56:54,927 INFO L87 Difference]: Start difference. First operand 1017 states and 3261 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:55,942 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 74 [2021-06-05 04:56:56,273 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 74 [2021-06-05 04:56:56,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:56,560 INFO L93 Difference]: Finished difference Result 1594 states and 4846 transitions. [2021-06-05 04:56:56,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:56:56,560 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:56:56,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:56,562 INFO L225 Difference]: With dead ends: 1594 [2021-06-05 04:56:56,562 INFO L226 Difference]: Without dead ends: 1465 [2021-06-05 04:56:56,562 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 1629.0ms TimeCoverageRelationStatistics Valid=227, Invalid=1255, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 04:56:56,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1465 states. [2021-06-05 04:56:56,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1465 to 1015. [2021-06-05 04:56:56,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1015 states, 1014 states have (on average 3.201183431952663) internal successors, (3246), 1014 states have internal predecessors, (3246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:56,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1015 states to 1015 states and 3246 transitions. [2021-06-05 04:56:56,573 INFO L78 Accepts]: Start accepts. Automaton has 1015 states and 3246 transitions. Word has length 25 [2021-06-05 04:56:56,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:56,573 INFO L482 AbstractCegarLoop]: Abstraction has 1015 states and 3246 transitions. [2021-06-05 04:56:56,573 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:56,573 INFO L276 IsEmpty]: Start isEmpty. Operand 1015 states and 3246 transitions. [2021-06-05 04:56:56,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:56:56,574 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:56,574 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:56,774 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 404 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9216 [2021-06-05 04:56:56,775 INFO L430 AbstractCegarLoop]: === Iteration 420 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:56,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:56,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1516618744, now seen corresponding path program 403 times [2021-06-05 04:56:56,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:56,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741520575] [2021-06-05 04:56:56,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:56,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:56,861 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:56:56,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:56,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741520575] [2021-06-05 04:56:56,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741520575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:56,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409806267] [2021-06-05 04:56:56,861 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:56,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:56,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:56:56,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:57,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:57,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:57,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:56:57,319 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:57,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:56:57,323 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:57,434 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-06-05 04:56:57,435 INFO L628 ElimStorePlain]: treesize reduction 6, result has 95.1 percent of original size [2021-06-05 04:56:57,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:56:57,439 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:57,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:56:57,442 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:57,494 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:56:57,496 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 5 xjuncts. [2021-06-05 04:56:57,496 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:152, output treesize:100 [2021-06-05 04:56:57,705 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:57,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409806267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:57,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:57,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-06-05 04:56:57,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33683538] [2021-06-05 04:56:57,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:56:57,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:57,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:56:57,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:56:57,706 INFO L87 Difference]: Start difference. First operand 1015 states and 3246 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:58,914 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 75 [2021-06-05 04:56:59,402 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 78 [2021-06-05 04:56:59,560 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 79 [2021-06-05 04:57:00,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:00,005 INFO L93 Difference]: Finished difference Result 1442 states and 4403 transitions. [2021-06-05 04:57:00,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 04:57:00,005 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:57:00,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:00,007 INFO L225 Difference]: With dead ends: 1442 [2021-06-05 04:57:00,007 INFO L226 Difference]: Without dead ends: 1293 [2021-06-05 04:57:00,007 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 2210.7ms TimeCoverageRelationStatistics Valid=335, Invalid=1645, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 04:57:00,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1293 states. [2021-06-05 04:57:00,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1293 to 1015. [2021-06-05 04:57:00,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1015 states, 1014 states have (on average 3.193293885601578) internal successors, (3238), 1014 states have internal predecessors, (3238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:00,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1015 states to 1015 states and 3238 transitions. [2021-06-05 04:57:00,018 INFO L78 Accepts]: Start accepts. Automaton has 1015 states and 3238 transitions. Word has length 25 [2021-06-05 04:57:00,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:00,018 INFO L482 AbstractCegarLoop]: Abstraction has 1015 states and 3238 transitions. [2021-06-05 04:57:00,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:00,018 INFO L276 IsEmpty]: Start isEmpty. Operand 1015 states and 3238 transitions. [2021-06-05 04:57:00,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:57:00,019 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:00,019 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:00,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 405 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9236 [2021-06-05 04:57:00,219 INFO L430 AbstractCegarLoop]: === Iteration 421 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:00,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:00,220 INFO L82 PathProgramCache]: Analyzing trace with hash 772965990, now seen corresponding path program 404 times [2021-06-05 04:57:00,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:00,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312687783] [2021-06-05 04:57:00,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:00,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:00,303 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:00,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:00,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312687783] [2021-06-05 04:57:00,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312687783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:00,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755368871] [2021-06-05 04:57:00,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:00,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:57:00,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:57:00,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:57:00,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:00,765 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:00,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755368871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:00,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:00,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 04:57:00,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860659615] [2021-06-05 04:57:00,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:57:00,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:00,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:57:00,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:57:00,766 INFO L87 Difference]: Start difference. First operand 1015 states and 3238 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:02,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:02,889 INFO L93 Difference]: Finished difference Result 1664 states and 5107 transitions. [2021-06-05 04:57:02,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 04:57:02,889 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:57:02,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:02,891 INFO L225 Difference]: With dead ends: 1664 [2021-06-05 04:57:02,891 INFO L226 Difference]: Without dead ends: 1584 [2021-06-05 04:57:02,892 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1477 ImplicationChecksByTransitivity, 1233.0ms TimeCoverageRelationStatistics Valid=501, Invalid=4329, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 04:57:02,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1584 states. [2021-06-05 04:57:02,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1584 to 996. [2021-06-05 04:57:02,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 996 states, 995 states have (on average 3.191959798994975) internal successors, (3176), 995 states have internal predecessors, (3176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:02,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 996 states to 996 states and 3176 transitions. [2021-06-05 04:57:02,903 INFO L78 Accepts]: Start accepts. Automaton has 996 states and 3176 transitions. Word has length 25 [2021-06-05 04:57:02,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:02,903 INFO L482 AbstractCegarLoop]: Abstraction has 996 states and 3176 transitions. [2021-06-05 04:57:02,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:02,904 INFO L276 IsEmpty]: Start isEmpty. Operand 996 states and 3176 transitions. [2021-06-05 04:57:02,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:57:02,905 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:02,905 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:03,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 406 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9259 [2021-06-05 04:57:03,105 INFO L430 AbstractCegarLoop]: === Iteration 422 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:03,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:03,105 INFO L82 PathProgramCache]: Analyzing trace with hash -499967718, now seen corresponding path program 405 times [2021-06-05 04:57:03,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:03,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90059361] [2021-06-05 04:57:03,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:03,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:03,197 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:03,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:03,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90059361] [2021-06-05 04:57:03,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90059361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:03,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23782249] [2021-06-05 04:57:03,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:03,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:57:03,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:57:03,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:57:03,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:03,646 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:03,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23782249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:03,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:03,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 04:57:03,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127288300] [2021-06-05 04:57:03,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:57:03,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:03,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:57:03,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:57:03,647 INFO L87 Difference]: Start difference. First operand 996 states and 3176 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:05,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:05,689 INFO L93 Difference]: Finished difference Result 1708 states and 5268 transitions. [2021-06-05 04:57:05,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 04:57:05,689 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:57:05,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:05,691 INFO L225 Difference]: With dead ends: 1708 [2021-06-05 04:57:05,691 INFO L226 Difference]: Without dead ends: 1628 [2021-06-05 04:57:05,692 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1508 ImplicationChecksByTransitivity, 1311.1ms TimeCoverageRelationStatistics Valid=555, Invalid=4415, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 04:57:05,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1628 states. [2021-06-05 04:57:05,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1628 to 972. [2021-06-05 04:57:05,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 972 states, 971 states have (on average 3.194644696189495) internal successors, (3102), 971 states have internal predecessors, (3102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:05,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 972 states to 972 states and 3102 transitions. [2021-06-05 04:57:05,704 INFO L78 Accepts]: Start accepts. Automaton has 972 states and 3102 transitions. Word has length 25 [2021-06-05 04:57:05,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:05,704 INFO L482 AbstractCegarLoop]: Abstraction has 972 states and 3102 transitions. [2021-06-05 04:57:05,704 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:05,704 INFO L276 IsEmpty]: Start isEmpty. Operand 972 states and 3102 transitions. [2021-06-05 04:57:05,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:57:05,705 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:05,705 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:05,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 407 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9266 [2021-06-05 04:57:05,905 INFO L430 AbstractCegarLoop]: === Iteration 423 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:05,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:05,905 INFO L82 PathProgramCache]: Analyzing trace with hash 438157004, now seen corresponding path program 406 times [2021-06-05 04:57:05,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:05,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221349842] [2021-06-05 04:57:05,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:05,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:05,986 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:05,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:05,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221349842] [2021-06-05 04:57:05,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221349842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:05,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991953967] [2021-06-05 04:57:05,987 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:06,117 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:57:06,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:57:06,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:57:06,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:06,424 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:06,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991953967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:06,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:06,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 04:57:06,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285597640] [2021-06-05 04:57:06,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:57:06,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:06,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:57:06,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:57:06,425 INFO L87 Difference]: Start difference. First operand 972 states and 3102 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:08,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:08,318 INFO L93 Difference]: Finished difference Result 1607 states and 4889 transitions. [2021-06-05 04:57:08,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 04:57:08,319 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:57:08,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:08,321 INFO L225 Difference]: With dead ends: 1607 [2021-06-05 04:57:08,321 INFO L226 Difference]: Without dead ends: 1527 [2021-06-05 04:57:08,321 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1570 ImplicationChecksByTransitivity, 1107.3ms TimeCoverageRelationStatistics Valid=589, Invalid=4667, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 04:57:08,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1527 states. [2021-06-05 04:57:08,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1527 to 850. [2021-06-05 04:57:08,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 850 states, 849 states have (on average 3.1590106007067136) internal successors, (2682), 849 states have internal predecessors, (2682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:08,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 2682 transitions. [2021-06-05 04:57:08,339 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 2682 transitions. Word has length 25 [2021-06-05 04:57:08,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:08,339 INFO L482 AbstractCegarLoop]: Abstraction has 850 states and 2682 transitions. [2021-06-05 04:57:08,340 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:08,340 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 2682 transitions. [2021-06-05 04:57:08,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:57:08,340 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:08,340 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:08,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9273,408 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:08,541 INFO L430 AbstractCegarLoop]: === Iteration 424 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:08,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:08,541 INFO L82 PathProgramCache]: Analyzing trace with hash -291107904, now seen corresponding path program 407 times [2021-06-05 04:57:08,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:08,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004505867] [2021-06-05 04:57:08,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:08,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:08,625 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:57:08,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:08,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004505867] [2021-06-05 04:57:08,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004505867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:08,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333139272] [2021-06-05 04:57:08,625 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:08,759 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:57:08,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:57:08,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:57:08,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:09,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:09,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:09,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:57:09,065 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:09,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:57:09,069 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:09,203 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2021-06-05 04:57:09,203 INFO L628 ElimStorePlain]: treesize reduction 36, result has 78.7 percent of original size [2021-06-05 04:57:09,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:57:09,207 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:09,269 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:09,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:57:09,273 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:09,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:57:09,277 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:09,334 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:09,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:57:09,338 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:09,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:57:09,342 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:09,395 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:09,399 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: 6 dim-0 vars, and 6 xjuncts. [2021-06-05 04:57:09,399 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 8 variables, input treesize:199, output treesize:114 [2021-06-05 04:57:09,636 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:09,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333139272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:09,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:09,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 21 [2021-06-05 04:57:09,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088976313] [2021-06-05 04:57:09,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:57:09,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:09,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:57:09,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:57:09,637 INFO L87 Difference]: Start difference. First operand 850 states and 2682 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:11,059 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 58 [2021-06-05 04:57:11,625 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 62 [2021-06-05 04:57:12,195 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 61 [2021-06-05 04:57:12,759 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 60 [2021-06-05 04:57:13,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:13,470 INFO L93 Difference]: Finished difference Result 1778 states and 5323 transitions. [2021-06-05 04:57:13,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 04:57:13,471 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:57:13,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:13,473 INFO L225 Difference]: With dead ends: 1778 [2021-06-05 04:57:13,473 INFO L226 Difference]: Without dead ends: 1438 [2021-06-05 04:57:13,473 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 3620.4ms TimeCoverageRelationStatistics Valid=539, Invalid=2653, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 04:57:13,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1438 states. [2021-06-05 04:57:13,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1438 to 848. [2021-06-05 04:57:13,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 848 states, 847 states have (on average 3.1499409681227863) internal successors, (2668), 847 states have internal predecessors, (2668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:13,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 848 states to 848 states and 2668 transitions. [2021-06-05 04:57:13,483 INFO L78 Accepts]: Start accepts. Automaton has 848 states and 2668 transitions. Word has length 25 [2021-06-05 04:57:13,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:13,483 INFO L482 AbstractCegarLoop]: Abstraction has 848 states and 2668 transitions. [2021-06-05 04:57:13,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:13,483 INFO L276 IsEmpty]: Start isEmpty. Operand 848 states and 2668 transitions. [2021-06-05 04:57:13,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:57:13,484 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:13,484 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:13,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9280,409 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:13,684 INFO L430 AbstractCegarLoop]: === Iteration 425 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:13,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:13,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1194779832, now seen corresponding path program 408 times [2021-06-05 04:57:13,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:13,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155203101] [2021-06-05 04:57:13,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:13,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:13,769 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 04:57:13,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:13,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155203101] [2021-06-05 04:57:13,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155203101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:13,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551217021] [2021-06-05 04:57:13,769 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:13,900 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:57:13,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:57:13,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:57:13,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:14,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:14,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:14,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:57:14,098 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:14,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:57:14,102 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:14,246 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-06-05 04:57:14,246 INFO L628 ElimStorePlain]: treesize reduction 36, result has 78.7 percent of original size [2021-06-05 04:57:14,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:57:14,251 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:14,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:57:14,254 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:14,313 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:14,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:57:14,318 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:14,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:57:14,321 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:14,377 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:14,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:57:14,381 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:14,435 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:14,438 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: 6 dim-0 vars, and 6 xjuncts. [2021-06-05 04:57:14,438 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 8 variables, input treesize:199, output treesize:114 [2021-06-05 04:57:14,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:57:14,699 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:14,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:14,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:57:14,702 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:14,735 INFO L628 ElimStorePlain]: treesize reduction 23, result has 58.9 percent of original size [2021-06-05 04:57:14,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:57:14,738 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:14,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:14,751 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:57:14,751 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:79, output treesize:13 [2021-06-05 04:57:14,804 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:14,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551217021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:14,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:14,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-06-05 04:57:14,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479886442] [2021-06-05 04:57:14,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:57:14,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:14,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:57:14,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:57:14,805 INFO L87 Difference]: Start difference. First operand 848 states and 2668 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:16,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:16,000 INFO L93 Difference]: Finished difference Result 1451 states and 4422 transitions. [2021-06-05 04:57:16,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:57:16,000 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:57:16,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:16,002 INFO L225 Difference]: With dead ends: 1451 [2021-06-05 04:57:16,002 INFO L226 Difference]: Without dead ends: 1313 [2021-06-05 04:57:16,003 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 1104.5ms TimeCoverageRelationStatistics Valid=218, Invalid=1188, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 04:57:16,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1313 states. [2021-06-05 04:57:16,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1313 to 828. [2021-06-05 04:57:16,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 828 states, 827 states have (on average 3.1499395405078596) internal successors, (2605), 827 states have internal predecessors, (2605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:16,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 2605 transitions. [2021-06-05 04:57:16,013 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 2605 transitions. Word has length 25 [2021-06-05 04:57:16,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:16,013 INFO L482 AbstractCegarLoop]: Abstraction has 828 states and 2605 transitions. [2021-06-05 04:57:16,013 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:16,013 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 2605 transitions. [2021-06-05 04:57:16,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:57:16,014 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:16,014 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:16,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 410 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9304 [2021-06-05 04:57:16,215 INFO L430 AbstractCegarLoop]: === Iteration 426 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:16,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:16,215 INFO L82 PathProgramCache]: Analyzing trace with hash 902879914, now seen corresponding path program 409 times [2021-06-05 04:57:16,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:16,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132638760] [2021-06-05 04:57:16,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:16,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:16,295 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 04:57:16,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:16,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132638760] [2021-06-05 04:57:16,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132638760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:16,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625958804] [2021-06-05 04:57:16,295 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:16,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:16,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:57:16,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:16,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:16,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:16,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:57:16,623 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:16,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:57:16,627 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:16,765 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2021-06-05 04:57:16,765 INFO L628 ElimStorePlain]: treesize reduction 59, result has 68.4 percent of original size [2021-06-05 04:57:16,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:57:16,769 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:16,828 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:16,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:57:16,832 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:16,889 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:16,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:57:16,893 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:16,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:57:16,896 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:16,950 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:16,953 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: 6 dim-0 vars, and 6 xjuncts. [2021-06-05 04:57:16,953 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:199, output treesize:114 [2021-06-05 04:57:17,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:57:17,236 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:17,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:17,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:57:17,240 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:17,318 INFO L628 ElimStorePlain]: treesize reduction 65, result has 51.1 percent of original size [2021-06-05 04:57:17,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:57:17,322 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:17,350 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:17,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:57:17,354 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:17,381 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:17,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:57:17,384 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:17,410 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:17,411 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:57:17,411 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:157, output treesize:25 [2021-06-05 04:57:17,495 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:17,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625958804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:17,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:17,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-06-05 04:57:17,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755928592] [2021-06-05 04:57:17,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:57:17,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:17,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:57:17,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:57:17,496 INFO L87 Difference]: Start difference. First operand 828 states and 2605 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:19,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:19,962 INFO L93 Difference]: Finished difference Result 1421 states and 4208 transitions. [2021-06-05 04:57:19,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 04:57:19,962 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:57:19,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:19,964 INFO L225 Difference]: With dead ends: 1421 [2021-06-05 04:57:19,964 INFO L226 Difference]: Without dead ends: 1233 [2021-06-05 04:57:19,964 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 2176.5ms TimeCoverageRelationStatistics Valid=272, Invalid=1620, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 04:57:19,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1233 states. [2021-06-05 04:57:19,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1233 to 836. [2021-06-05 04:57:19,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 836 states, 835 states have (on average 3.1580838323353295) internal successors, (2637), 835 states have internal predecessors, (2637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:19,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 836 states to 836 states and 2637 transitions. [2021-06-05 04:57:19,973 INFO L78 Accepts]: Start accepts. Automaton has 836 states and 2637 transitions. Word has length 25 [2021-06-05 04:57:19,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:19,973 INFO L482 AbstractCegarLoop]: Abstraction has 836 states and 2637 transitions. [2021-06-05 04:57:19,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:19,973 INFO L276 IsEmpty]: Start isEmpty. Operand 836 states and 2637 transitions. [2021-06-05 04:57:19,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:57:19,974 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:19,974 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:20,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 411 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9337 [2021-06-05 04:57:20,175 INFO L430 AbstractCegarLoop]: === Iteration 427 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:20,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:20,175 INFO L82 PathProgramCache]: Analyzing trace with hash 1605652284, now seen corresponding path program 410 times [2021-06-05 04:57:20,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:20,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885199354] [2021-06-05 04:57:20,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:20,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:20,252 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 04:57:20,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:20,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885199354] [2021-06-05 04:57:20,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885199354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:20,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821710754] [2021-06-05 04:57:20,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:20,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:57:20,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:57:20,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:57:20,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:20,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:20,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:20,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:57:20,667 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:20,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:57:20,670 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:20,785 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-06-05 04:57:20,786 INFO L628 ElimStorePlain]: treesize reduction 29, result has 79.3 percent of original size [2021-06-05 04:57:20,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:57:20,789 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:20,843 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:20,845 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 5 xjuncts. [2021-06-05 04:57:20,845 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:152, output treesize:100 [2021-06-05 04:57:21,047 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:21,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821710754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:21,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:21,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-06-05 04:57:21,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517736224] [2021-06-05 04:57:21,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:57:21,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:21,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:57:21,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:57:21,048 INFO L87 Difference]: Start difference. First operand 836 states and 2637 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:22,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:22,783 INFO L93 Difference]: Finished difference Result 1196 states and 3596 transitions. [2021-06-05 04:57:22,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 04:57:22,784 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:57:22,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:22,785 INFO L225 Difference]: With dead ends: 1196 [2021-06-05 04:57:22,785 INFO L226 Difference]: Without dead ends: 1046 [2021-06-05 04:57:22,785 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 1659.1ms TimeCoverageRelationStatistics Valid=226, Invalid=1414, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 04:57:22,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1046 states. [2021-06-05 04:57:22,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1046 to 826. [2021-06-05 04:57:22,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 825 states have (on average 3.1515151515151514) internal successors, (2600), 825 states have internal predecessors, (2600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:22,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 2600 transitions. [2021-06-05 04:57:22,794 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 2600 transitions. Word has length 25 [2021-06-05 04:57:22,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:22,794 INFO L482 AbstractCegarLoop]: Abstraction has 826 states and 2600 transitions. [2021-06-05 04:57:22,794 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:22,794 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 2600 transitions. [2021-06-05 04:57:22,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:57:22,795 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:22,795 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:22,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 412 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9374 [2021-06-05 04:57:22,995 INFO L430 AbstractCegarLoop]: === Iteration 428 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:22,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:22,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1175033238, now seen corresponding path program 411 times [2021-06-05 04:57:22,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:22,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141381703] [2021-06-05 04:57:22,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:23,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:23,068 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:57:23,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:23,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141381703] [2021-06-05 04:57:23,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141381703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:23,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201237652] [2021-06-05 04:57:23,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:23,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:57:23,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:57:23,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:57:23,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:23,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:57:23,450 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:23,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:23,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:57:23,454 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:23,566 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-06-05 04:57:23,566 INFO L628 ElimStorePlain]: treesize reduction 6, result has 95.1 percent of original size [2021-06-05 04:57:23,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:57:23,570 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:23,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:57:23,574 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:23,632 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:23,635 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 5 xjuncts. [2021-06-05 04:57:23,635 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:152, output treesize:100 [2021-06-05 04:57:23,838 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:23,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201237652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:23,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:23,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-06-05 04:57:23,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766437067] [2021-06-05 04:57:23,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:57:23,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:23,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:57:23,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:57:23,839 INFO L87 Difference]: Start difference. First operand 826 states and 2600 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:25,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:25,005 INFO L93 Difference]: Finished difference Result 1043 states and 3193 transitions. [2021-06-05 04:57:25,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:57:25,005 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:57:25,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:25,006 INFO L225 Difference]: With dead ends: 1043 [2021-06-05 04:57:25,006 INFO L226 Difference]: Without dead ends: 894 [2021-06-05 04:57:25,006 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1140.0ms TimeCoverageRelationStatistics Valid=144, Invalid=848, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:57:25,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 894 states. [2021-06-05 04:57:25,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 894 to 803. [2021-06-05 04:57:25,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 802 states have (on average 3.1546134663341645) internal successors, (2530), 802 states have internal predecessors, (2530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:25,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 2530 transitions. [2021-06-05 04:57:25,014 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 2530 transitions. Word has length 25 [2021-06-05 04:57:25,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:25,014 INFO L482 AbstractCegarLoop]: Abstraction has 803 states and 2530 transitions. [2021-06-05 04:57:25,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:25,014 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 2530 transitions. [2021-06-05 04:57:25,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:57:25,015 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:25,015 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:25,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9395,413 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:25,216 INFO L430 AbstractCegarLoop]: === Iteration 429 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:25,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:25,216 INFO L82 PathProgramCache]: Analyzing trace with hash -171956220, now seen corresponding path program 412 times [2021-06-05 04:57:25,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:25,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720949426] [2021-06-05 04:57:25,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:25,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:25,314 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:57:25,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:25,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720949426] [2021-06-05 04:57:25,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720949426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:25,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437470630] [2021-06-05 04:57:25,314 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:25,448 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:57:25,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:57:25,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:57:25,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:25,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:25,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:25,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:57:25,583 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:25,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:57:25,586 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:25,687 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2021-06-05 04:57:25,687 INFO L628 ElimStorePlain]: treesize reduction 26, result has 78.7 percent of original size [2021-06-05 04:57:25,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:57:25,691 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:25,736 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:25,739 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 5 xjuncts. [2021-06-05 04:57:25,739 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:134, output treesize:85 [2021-06-05 04:57:25,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:25,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:25,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 04:57:25,972 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:25,974 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:25,975 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:26,005 INFO L628 ElimStorePlain]: treesize reduction 20, result has 61.5 percent of original size [2021-06-05 04:57:26,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:57:26,008 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:26,019 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:26,020 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:57:26,020 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:79, output treesize:13 [2021-06-05 04:57:26,071 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:26,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437470630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:26,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:26,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-06-05 04:57:26,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001103341] [2021-06-05 04:57:26,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:57:26,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:26,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:57:26,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:57:26,071 INFO L87 Difference]: Start difference. First operand 803 states and 2530 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:27,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:27,089 INFO L93 Difference]: Finished difference Result 1281 states and 3847 transitions. [2021-06-05 04:57:27,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:57:27,090 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:57:27,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:27,091 INFO L225 Difference]: With dead ends: 1281 [2021-06-05 04:57:27,091 INFO L226 Difference]: Without dead ends: 1143 [2021-06-05 04:57:27,091 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 951.7ms TimeCoverageRelationStatistics Valid=223, Invalid=1037, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 04:57:27,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1143 states. [2021-06-05 04:57:27,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1143 to 787. [2021-06-05 04:57:27,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 787 states, 786 states have (on average 3.127226463104326) internal successors, (2458), 786 states have internal predecessors, (2458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:27,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 2458 transitions. [2021-06-05 04:57:27,100 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 2458 transitions. Word has length 25 [2021-06-05 04:57:27,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:27,100 INFO L482 AbstractCegarLoop]: Abstraction has 787 states and 2458 transitions. [2021-06-05 04:57:27,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:27,100 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 2458 transitions. [2021-06-05 04:57:27,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:57:27,101 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:27,101 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:27,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 414 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9419 [2021-06-05 04:57:27,301 INFO L430 AbstractCegarLoop]: === Iteration 430 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:27,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:27,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1513281842, now seen corresponding path program 413 times [2021-06-05 04:57:27,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:27,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911623302] [2021-06-05 04:57:27,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:27,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:27,402 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:57:27,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:27,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911623302] [2021-06-05 04:57:27,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911623302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:27,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852517743] [2021-06-05 04:57:27,403 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:27,538 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:57:27,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:57:27,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:57:27,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:27,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:27,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:27,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:57:27,671 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:27,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:57:27,675 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:27,813 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2021-06-05 04:57:27,813 INFO L628 ElimStorePlain]: treesize reduction 36, result has 78.7 percent of original size [2021-06-05 04:57:27,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:57:27,818 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:27,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:57:27,822 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:27,882 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:27,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:57:27,886 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:27,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:57:27,890 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:27,947 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:27,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:57:27,951 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:28,005 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:28,008 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: 6 dim-0 vars, and 6 xjuncts. [2021-06-05 04:57:28,009 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 8 variables, input treesize:199, output treesize:114 [2021-06-05 04:57:28,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:57:28,275 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:28,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:28,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:57:28,280 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:28,357 INFO L628 ElimStorePlain]: treesize reduction 65, result has 51.1 percent of original size [2021-06-05 04:57:28,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:57:28,361 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:28,390 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:28,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:57:28,393 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:28,421 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:28,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:57:28,425 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:28,451 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:28,452 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:57:28,452 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:157, output treesize:25 [2021-06-05 04:57:28,532 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:28,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852517743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:28,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:28,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-06-05 04:57:28,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446914322] [2021-06-05 04:57:28,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:57:28,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:28,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:57:28,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:57:28,533 INFO L87 Difference]: Start difference. First operand 787 states and 2458 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:30,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:30,934 INFO L93 Difference]: Finished difference Result 1327 states and 3926 transitions. [2021-06-05 04:57:30,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 04:57:30,934 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:57:30,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:30,936 INFO L225 Difference]: With dead ends: 1327 [2021-06-05 04:57:30,936 INFO L226 Difference]: Without dead ends: 1139 [2021-06-05 04:57:30,936 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 2108.6ms TimeCoverageRelationStatistics Valid=311, Invalid=1759, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 04:57:30,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2021-06-05 04:57:30,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 785. [2021-06-05 04:57:30,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 784 states have (on average 3.128826530612245) internal successors, (2453), 784 states have internal predecessors, (2453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:30,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 2453 transitions. [2021-06-05 04:57:30,945 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 2453 transitions. Word has length 25 [2021-06-05 04:57:30,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:30,945 INFO L482 AbstractCegarLoop]: Abstraction has 785 states and 2453 transitions. [2021-06-05 04:57:30,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:30,945 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 2453 transitions. [2021-06-05 04:57:30,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:57:30,946 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:30,946 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:31,146 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 415 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9451 [2021-06-05 04:57:31,146 INFO L430 AbstractCegarLoop]: === Iteration 431 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:31,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:31,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1432505886, now seen corresponding path program 414 times [2021-06-05 04:57:31,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:31,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92975637] [2021-06-05 04:57:31,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:31,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:31,234 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:57:31,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:31,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92975637] [2021-06-05 04:57:31,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92975637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:31,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793415553] [2021-06-05 04:57:31,235 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:31,370 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:57:31,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:57:31,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:57:31,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:31,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:57:31,631 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:31,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:31,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 04:57:31,636 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:31,786 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2021-06-05 04:57:31,787 INFO L628 ElimStorePlain]: treesize reduction 38, result has 79.9 percent of original size [2021-06-05 04:57:31,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:57:31,791 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:31,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:57:31,795 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:31,862 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:31,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 04:57:31,866 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:31,932 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:31,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:57:31,936 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:31,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 04:57:31,940 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:32,003 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:32,007 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: 6 dim-0 vars, and 6 xjuncts. [2021-06-05 04:57:32,008 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 8 variables, input treesize:223, output treesize:132 [2021-06-05 04:57:32,199 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:32,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793415553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:32,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:32,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-06-05 04:57:32,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671658700] [2021-06-05 04:57:32,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:57:32,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:32,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:57:32,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:57:32,200 INFO L87 Difference]: Start difference. First operand 785 states and 2453 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:32,995 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 65 [2021-06-05 04:57:33,325 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 64 [2021-06-05 04:57:33,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:33,540 INFO L93 Difference]: Finished difference Result 969 states and 2958 transitions. [2021-06-05 04:57:33,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:57:33,541 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:57:33,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:33,542 INFO L225 Difference]: With dead ends: 969 [2021-06-05 04:57:33,542 INFO L226 Difference]: Without dead ends: 828 [2021-06-05 04:57:33,542 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 1376.1ms TimeCoverageRelationStatistics Valid=166, Invalid=890, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:57:33,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2021-06-05 04:57:33,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 723. [2021-06-05 04:57:33,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 723 states, 722 states have (on average 3.149584487534626) internal successors, (2274), 722 states have internal predecessors, (2274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:33,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 2274 transitions. [2021-06-05 04:57:33,549 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 2274 transitions. Word has length 25 [2021-06-05 04:57:33,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:33,549 INFO L482 AbstractCegarLoop]: Abstraction has 723 states and 2274 transitions. [2021-06-05 04:57:33,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:33,549 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 2274 transitions. [2021-06-05 04:57:33,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:57:33,550 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:33,550 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:33,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9487,416 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:33,750 INFO L430 AbstractCegarLoop]: === Iteration 432 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:33,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:33,750 INFO L82 PathProgramCache]: Analyzing trace with hash 993588152, now seen corresponding path program 415 times [2021-06-05 04:57:33,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:33,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198454732] [2021-06-05 04:57:33,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:33,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:33,843 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:57:33,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:33,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198454732] [2021-06-05 04:57:33,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198454732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:33,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949577957] [2021-06-05 04:57:33,844 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true Received shutdown request... [2021-06-05 04:57:33,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:33,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:57:33,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:34,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 417 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9510 [2021-06-05 04:57:34,185 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 04:57:34,186 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 04:57:34,187 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 04:57:34,188 INFO L202 PluginConnector]: Adding new model nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 04:57:34 BasicIcfg [2021-06-05 04:57:34,188 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 04:57:34,188 INFO L168 Benchmark]: Toolchain (without parser) took 769528.70 ms. Allocated memory was 343.9 MB in the beginning and 717.2 MB in the end (delta: 373.3 MB). Free memory was 322.9 MB in the beginning and 423.1 MB in the end (delta: -100.2 MB). Peak memory consumption was 274.5 MB. Max. memory is 16.0 GB. [2021-06-05 04:57:34,188 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.15 ms. Allocated memory is still 343.9 MB. Free memory is still 324.3 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 04:57:34,188 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.77 ms. Allocated memory is still 343.9 MB. Free memory was 322.9 MB in the beginning and 321.3 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 04:57:34,188 INFO L168 Benchmark]: Boogie Preprocessor took 21.06 ms. Allocated memory is still 343.9 MB. Free memory was 321.3 MB in the beginning and 320.2 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 04:57:34,188 INFO L168 Benchmark]: RCFGBuilder took 620.33 ms. Allocated memory is still 343.9 MB. Free memory was 320.2 MB in the beginning and 310.2 MB in the end (delta: 9.9 MB). Peak memory consumption was 21.4 MB. Max. memory is 16.0 GB. [2021-06-05 04:57:34,188 INFO L168 Benchmark]: TraceAbstraction took 768856.46 ms. Allocated memory was 343.9 MB in the beginning and 717.2 MB in the end (delta: 373.3 MB). Free memory was 310.2 MB in the beginning and 423.1 MB in the end (delta: -112.9 MB). Peak memory consumption was 261.4 MB. Max. memory is 16.0 GB. [2021-06-05 04:57:34,189 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.15 ms. Allocated memory is still 343.9 MB. Free memory is still 324.3 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 26.77 ms. Allocated memory is still 343.9 MB. Free memory was 322.9 MB in the beginning and 321.3 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 21.06 ms. Allocated memory is still 343.9 MB. Free memory was 321.3 MB in the beginning and 320.2 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 620.33 ms. Allocated memory is still 343.9 MB. Free memory was 320.2 MB in the beginning and 310.2 MB in the end (delta: 9.9 MB). Peak memory consumption was 21.4 MB. Max. memory is 16.0 GB. * TraceAbstraction took 768856.46 ms. Allocated memory was 343.9 MB in the beginning and 717.2 MB in the end (delta: 373.3 MB). Free memory was 310.2 MB in the beginning and 423.1 MB in the end (delta: -112.9 MB). Peak memory consumption was 261.4 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 137]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 26 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 11 known predicates. - TimeoutResultAtElement [Line: 136]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 26 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 11 known predicates. - TimeoutResultAtElement [Line: 133]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 26 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 11 known predicates. - TimeoutResultAtElement [Line: 143]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 26 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 11 known predicates. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 38 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 768777.9ms, OverallIterations: 432, TraceHistogramMax: 3, EmptinessCheckTime: 414.8ms, AutomataDifference: 461152.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 20.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 39803 SDtfs, 60611 SDslu, 295591 SDs, 0 SdLazy, 293578 SolverSat, 15037 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 123299.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 25846 GetRequests, 10684 SyntacticMatches, 355 SemanticMatches, 14807 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198902 ImplicationChecksByTransitivity, 388024.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1764occurred in iteration=303, InterpolantAutomatonStates: 11960, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 4207.4ms AutomataMinimizationTime, 431 MinimizatonAttempts, 154429 StatesRemovedByMinimization, 427 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 2804.3ms SsaConstructionTime, 6855.3ms SatisfiabilityAnalysisTime, 176425.5ms InterpolantComputationTime, 19205 NumberOfCodeBlocks, 19190 NumberOfCodeBlocksAsserted, 1378 NumberOfCheckSat, 18359 ConstructedInterpolants, 746 QuantifiedInterpolants, 159091 SizeOfPredicates, 2431 NumberOfNonLiveVariables, 45371 ConjunctsInSsa, 8343 ConjunctsInUnsatCore, 846 InterpolantComputations, 16 PerfectInterpolantSequences, 1856/7647 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown