/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-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-5.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 14:59:40,337 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 14:59:40,339 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 14:59:40,367 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 14:59:40,380 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-05 14:59:40,381 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-05 14:59:40,382 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-05 14:59:40,382 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-05 14:59:40,383 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-05 14:59:40,383 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-05 14:59:40,384 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-05 14:59:40,385 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-05 14:59:40,386 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-05 14:59:40,387 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-05 14:59:40,388 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-05 14:59:40,389 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-05 14:59:40,394 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-05 14:59:40,401 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 14:59:40,402 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 14:59:40,402 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 14:59:40,403 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-Separate.epf [2021-06-05 14:59:40,435 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 14:59:40,435 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 14:59:40,435 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 14:59:40,435 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 14:59:40,437 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 14:59:40,437 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 14:59:40,438 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 14:59:40,438 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 14:59:40,438 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 14:59:40,438 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 14:59:40,439 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 14:59:40,439 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 14:59:40,439 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 14:59:40,439 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 14:59:40,439 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 14:59:40,439 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 14:59:40,439 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 14:59:40,439 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 14:59:40,439 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 14:59:40,440 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 14:59:40,440 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 14:59:40,440 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 14:59:40,440 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 14:59:40,440 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 14:59:40,440 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 14:59:40,440 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 14:59:40,440 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 14:59:40,441 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 14:59:40,441 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 14:59:40,441 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 14:59:40,441 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 14:59:40,441 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 14:59:40,441 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 14:59:40,690 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 14:59:40,708 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 14:59:40,709 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 14:59:40,710 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 14:59:40,711 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 14:59:40,711 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-5.wvr.bpl [2021-06-05 14:59:40,711 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-5.wvr.bpl' [2021-06-05 14:59:40,738 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 14:59:40,739 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 14:59:40,741 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 14:59:40,741 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 14:59:40,741 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 14:59:40,749 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:59:40" (1/1) ... [2021-06-05 14:59:40,754 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:59:40" (1/1) ... [2021-06-05 14:59:40,763 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 14:59:40,764 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 14:59:40,765 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 14:59:40,765 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 14:59:40,770 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:59:40" (1/1) ... [2021-06-05 14:59:40,770 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:59:40" (1/1) ... [2021-06-05 14:59:40,771 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:59:40" (1/1) ... [2021-06-05 14:59:40,771 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:59:40" (1/1) ... [2021-06-05 14:59:40,773 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:59:40" (1/1) ... [2021-06-05 14:59:40,776 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:59:40" (1/1) ... [2021-06-05 14:59:40,776 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:59:40" (1/1) ... [2021-06-05 14:59:40,777 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 14:59:40,778 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 14:59:40,778 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 14:59:40,779 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 14:59:40,780 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:59:40" (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 14:59:40,848 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 14:59:40,848 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 14:59:40,848 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 14:59:40,848 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 14:59:40,848 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 14:59:40,848 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 14:59:40,849 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 14:59:40,849 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 14:59:40,849 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 14:59:40,849 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 14:59:40,850 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 14:59:40,850 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 14:59:40,850 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 14:59:41,033 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 14:59:41,033 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 14:59:41,035 INFO L202 PluginConnector]: Adding new model misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 02:59:41 BoogieIcfgContainer [2021-06-05 14:59:41,035 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 14:59:41,036 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 14:59:41,036 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 14:59:41,038 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 14:59:41,038 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:59:40" (1/2) ... [2021-06-05 14:59:41,038 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2556b68b and model type misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 02:59:41, skipping insertion in model container [2021-06-05 14:59:41,039 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 02:59:41" (2/2) ... [2021-06-05 14:59:41,040 INFO L111 eAbstractionObserver]: Analyzing ICFG misc-5.wvr.bpl [2021-06-05 14:59:41,043 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 14:59:41,043 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 14:59:41,043 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 14:59:41,044 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 14:59:41,077 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-05 14:59:41,120 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-05 14:59:41,140 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 14:59:41,140 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 14:59:41,140 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 14:59:41,140 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 14:59:41,140 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 14:59:41,140 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 14:59:41,140 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 14:59:41,141 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 14:59:41,146 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 31 places, 23 transitions, 70 flow [2021-06-05 14:59:41,161 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 89 states, 87 states have (on average 2.6091954022988504) internal successors, (227), 88 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:41,163 INFO L276 IsEmpty]: Start isEmpty. Operand has 89 states, 87 states have (on average 2.6091954022988504) internal successors, (227), 88 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:41,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 14:59:41,170 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:41,170 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:41,171 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:41,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:41,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1648741274, now seen corresponding path program 1 times [2021-06-05 14:59:41,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:41,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368863903] [2021-06-05 14:59:41,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:41,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:41,273 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 14:59:41,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:41,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368863903] [2021-06-05 14:59:41,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368863903] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:59:41,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:59:41,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 14:59:41,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73900925] [2021-06-05 14:59:41,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 14:59:41,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:41,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 14:59:41,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 14:59:41,286 INFO L87 Difference]: Start difference. First operand has 89 states, 87 states have (on average 2.6091954022988504) internal successors, (227), 88 states have internal predecessors, (227), 0 states have call successors, (0), 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 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 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 14:59:41,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:41,314 INFO L93 Difference]: Finished difference Result 84 states and 197 transitions. [2021-06-05 14:59:41,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 14:59:41,316 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 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 14:59:41,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:41,321 INFO L225 Difference]: With dead ends: 84 [2021-06-05 14:59:41,321 INFO L226 Difference]: Without dead ends: 56 [2021-06-05 14:59:41,323 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 14:59:41,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-06-05 14:59:41,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-06-05 14:59:41,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.1272727272727274) internal successors, (117), 55 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:41,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 117 transitions. [2021-06-05 14:59:41,345 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 117 transitions. Word has length 14 [2021-06-05 14:59:41,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:41,345 INFO L482 AbstractCegarLoop]: Abstraction has 56 states and 117 transitions. [2021-06-05 14:59:41,345 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 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 14:59:41,345 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 117 transitions. [2021-06-05 14:59:41,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 14:59:41,346 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:41,346 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:41,346 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 14:59:41,347 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:41,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:41,347 INFO L82 PathProgramCache]: Analyzing trace with hash -482229000, now seen corresponding path program 2 times [2021-06-05 14:59:41,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:41,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834146643] [2021-06-05 14:59:41,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:41,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:41,368 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 14:59:41,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:41,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834146643] [2021-06-05 14:59:41,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834146643] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:59:41,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:59:41,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 14:59:41,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162787694] [2021-06-05 14:59:41,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 14:59:41,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:41,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 14:59:41,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 14:59:41,370 INFO L87 Difference]: Start difference. First operand 56 states and 117 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 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 14:59:41,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:41,406 INFO L93 Difference]: Finished difference Result 80 states and 164 transitions. [2021-06-05 14:59:41,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 14:59:41,408 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 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 14:59:41,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:41,409 INFO L225 Difference]: With dead ends: 80 [2021-06-05 14:59:41,409 INFO L226 Difference]: Without dead ends: 66 [2021-06-05 14:59:41,410 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:59:41,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-06-05 14:59:41,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-06-05 14:59:41,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.169230769230769) internal successors, (141), 65 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:41,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 141 transitions. [2021-06-05 14:59:41,416 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 141 transitions. Word has length 14 [2021-06-05 14:59:41,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:41,417 INFO L482 AbstractCegarLoop]: Abstraction has 66 states and 141 transitions. [2021-06-05 14:59:41,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 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 14:59:41,417 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 141 transitions. [2021-06-05 14:59:41,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:59:41,417 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:41,418 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:41,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 14:59:41,418 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:41,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:41,418 INFO L82 PathProgramCache]: Analyzing trace with hash 2120747962, now seen corresponding path program 1 times [2021-06-05 14:59:41,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:41,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593175899] [2021-06-05 14:59:41,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:41,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:41,476 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 14:59:41,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:41,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593175899] [2021-06-05 14:59:41,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593175899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:41,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221321953] [2021-06-05 14:59:41,477 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 14:59:41,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:41,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 14:59:41,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:41,585 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 14:59:41,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221321953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:41,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:41,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-06-05 14:59:41,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106274057] [2021-06-05 14:59:41,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:59:41,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:41,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:59:41,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:59:41,587 INFO L87 Difference]: Start difference. First operand 66 states and 141 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:41,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:41,624 INFO L93 Difference]: Finished difference Result 90 states and 188 transitions. [2021-06-05 14:59:41,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:59:41,624 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have 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 14:59:41,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:41,625 INFO L225 Difference]: With dead ends: 90 [2021-06-05 14:59:41,625 INFO L226 Difference]: Without dead ends: 76 [2021-06-05 14:59:41,625 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 33.0ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:59:41,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-06-05 14:59:41,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2021-06-05 14:59:41,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.2) internal successors, (165), 75 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:41,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 165 transitions. [2021-06-05 14:59:41,631 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 165 transitions. Word has length 16 [2021-06-05 14:59:41,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:41,631 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 165 transitions. [2021-06-05 14:59:41,632 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:41,632 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 165 transitions. [2021-06-05 14:59:41,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:59:41,632 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:41,632 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:41,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-06-05 14:59:41,849 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:41,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:41,850 INFO L82 PathProgramCache]: Analyzing trace with hash -255759302, now seen corresponding path program 1 times [2021-06-05 14:59:41,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:41,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284209975] [2021-06-05 14:59:41,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:41,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:41,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:41,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:41,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284209975] [2021-06-05 14:59:41,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284209975] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:59:41,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:59:41,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 14:59:41,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194240024] [2021-06-05 14:59:41,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 14:59:41,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:41,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 14:59:41,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:59:41,897 INFO L87 Difference]: Start difference. First operand 76 states and 165 transitions. Second operand has 5 states, 5 states have (on average 3.2) 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 14:59:41,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:41,932 INFO L93 Difference]: Finished difference Result 98 states and 208 transitions. [2021-06-05 14:59:41,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:59:41,933 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) 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 14:59:41,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:41,933 INFO L225 Difference]: With dead ends: 98 [2021-06-05 14:59:41,933 INFO L226 Difference]: Without dead ends: 84 [2021-06-05 14:59:41,934 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 22.3ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:59:41,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-06-05 14:59:41,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 76. [2021-06-05 14:59:41,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.2) internal successors, (165), 75 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:41,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 165 transitions. [2021-06-05 14:59:41,938 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 165 transitions. Word has length 16 [2021-06-05 14:59:41,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:41,938 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 165 transitions. [2021-06-05 14:59:41,939 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) 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 14:59:41,939 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 165 transitions. [2021-06-05 14:59:41,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:59:41,939 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:41,939 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:41,939 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 14:59:41,940 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:41,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:41,940 INFO L82 PathProgramCache]: Analyzing trace with hash -384325124, now seen corresponding path program 2 times [2021-06-05 14:59:41,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:41,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511401596] [2021-06-05 14:59:41,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:41,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:42,002 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:42,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:42,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511401596] [2021-06-05 14:59:42,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511401596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:42,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918093887] [2021-06-05 14:59:42,003 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 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 14:59:42,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:59:42,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:42,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:59:42,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:42,192 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:42,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918093887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:42,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:42,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-06-05 14:59:42,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990247720] [2021-06-05 14:59:42,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:59:42,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:42,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:59:42,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:59:42,193 INFO L87 Difference]: Start difference. First operand 76 states and 165 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 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 14:59:42,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:42,247 INFO L93 Difference]: Finished difference Result 108 states and 232 transitions. [2021-06-05 14:59:42,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 14:59:42,247 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 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 18 [2021-06-05 14:59:42,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:42,248 INFO L225 Difference]: With dead ends: 108 [2021-06-05 14:59:42,249 INFO L226 Difference]: Without dead ends: 94 [2021-06-05 14:59:42,249 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 53.7ms TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:59:42,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-06-05 14:59:42,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 86. [2021-06-05 14:59:42,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.223529411764706) internal successors, (189), 85 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:42,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 189 transitions. [2021-06-05 14:59:42,261 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 189 transitions. Word has length 18 [2021-06-05 14:59:42,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:42,262 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 189 transitions. [2021-06-05 14:59:42,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 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 14:59:42,262 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 189 transitions. [2021-06-05 14:59:42,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:59:42,265 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:42,265 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:42,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:42,481 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:42,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:42,481 INFO L82 PathProgramCache]: Analyzing trace with hash -196634824, now seen corresponding path program 1 times [2021-06-05 14:59:42,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:42,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373978405] [2021-06-05 14:59:42,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:42,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:42,518 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:42,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:42,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373978405] [2021-06-05 14:59:42,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373978405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:42,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212262343] [2021-06-05 14:59:42,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 14:59:42,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:42,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 14:59:42,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:42,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:42,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212262343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:42,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:42,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-06-05 14:59:42,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659511551] [2021-06-05 14:59:42,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:59:42,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:42,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:59:42,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:59:42,639 INFO L87 Difference]: Start difference. First operand 86 states and 189 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 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 14:59:42,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:42,756 INFO L93 Difference]: Finished difference Result 156 states and 344 transitions. [2021-06-05 14:59:42,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:59:42,757 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 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 18 [2021-06-05 14:59:42,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:42,758 INFO L225 Difference]: With dead ends: 156 [2021-06-05 14:59:42,758 INFO L226 Difference]: Without dead ends: 126 [2021-06-05 14:59:42,758 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 74.4ms TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:59:42,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-06-05 14:59:42,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 118. [2021-06-05 14:59:42,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.299145299145299) internal successors, (269), 117 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:42,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 269 transitions. [2021-06-05 14:59:42,770 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 269 transitions. Word has length 18 [2021-06-05 14:59:42,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:42,770 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 269 transitions. [2021-06-05 14:59:42,770 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 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 14:59:42,770 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 269 transitions. [2021-06-05 14:59:42,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:59:42,770 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:42,771 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:42,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:42,971 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:42,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:42,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1717092286, now seen corresponding path program 3 times [2021-06-05 14:59:42,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:42,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774136453] [2021-06-05 14:59:42,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:42,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:43,014 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 14:59:43,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:43,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774136453] [2021-06-05 14:59:43,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774136453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:43,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24406722] [2021-06-05 14:59:43,015 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 14:59:43,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:59:43,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:43,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 14:59:43,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:43,195 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 14:59:43,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24406722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:43,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:43,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-06-05 14:59:43,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374866370] [2021-06-05 14:59:43,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:59:43,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:43,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:59:43,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:59:43,196 INFO L87 Difference]: Start difference. First operand 118 states and 269 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:43,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:43,283 INFO L93 Difference]: Finished difference Result 142 states and 316 transitions. [2021-06-05 14:59:43,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:59:43,283 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have 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 14:59:43,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:43,284 INFO L225 Difference]: With dead ends: 142 [2021-06-05 14:59:43,284 INFO L226 Difference]: Without dead ends: 128 [2021-06-05 14:59:43,284 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 103.5ms TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:59:43,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-06-05 14:59:43,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 120. [2021-06-05 14:59:43,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.2941176470588234) internal successors, (273), 119 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:43,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 273 transitions. [2021-06-05 14:59:43,287 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 273 transitions. Word has length 20 [2021-06-05 14:59:43,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:43,288 INFO L482 AbstractCegarLoop]: Abstraction has 120 states and 273 transitions. [2021-06-05 14:59:43,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:43,288 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 273 transitions. [2021-06-05 14:59:43,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:59:43,288 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:43,288 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:43,503 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:43,504 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:43,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:43,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1886534454, now seen corresponding path program 2 times [2021-06-05 14:59:43,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:43,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822788686] [2021-06-05 14:59:43,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:43,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:43,574 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 14:59:43,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:43,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822788686] [2021-06-05 14:59:43,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822788686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:43,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130289862] [2021-06-05 14:59:43,577 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 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 14:59:43,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:59:43,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:43,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:59:43,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:43,696 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 14:59:43,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130289862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:43,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:43,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-06-05 14:59:43,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947476914] [2021-06-05 14:59:43,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:59:43,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:43,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:59:43,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:59:43,698 INFO L87 Difference]: Start difference. First operand 120 states and 273 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:43,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:43,781 INFO L93 Difference]: Finished difference Result 150 states and 336 transitions. [2021-06-05 14:59:43,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:59:43,782 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have 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 14:59:43,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:43,782 INFO L225 Difference]: With dead ends: 150 [2021-06-05 14:59:43,782 INFO L226 Difference]: Without dead ends: 136 [2021-06-05 14:59:43,783 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 86.9ms TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:59:43,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-06-05 14:59:43,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 128. [2021-06-05 14:59:43,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.3070866141732282) internal successors, (293), 127 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:43,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 293 transitions. [2021-06-05 14:59:43,786 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 293 transitions. Word has length 20 [2021-06-05 14:59:43,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:43,786 INFO L482 AbstractCegarLoop]: Abstraction has 128 states and 293 transitions. [2021-06-05 14:59:43,786 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:43,786 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 293 transitions. [2021-06-05 14:59:43,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:59:43,787 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:43,787 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:44,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-05 14:59:44,002 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:44,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:44,003 INFO L82 PathProgramCache]: Analyzing trace with hash 132809022, now seen corresponding path program 2 times [2021-06-05 14:59:44,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:44,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124110104] [2021-06-05 14:59:44,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:44,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:44,041 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:44,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:44,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124110104] [2021-06-05 14:59:44,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124110104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:44,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427450640] [2021-06-05 14:59:44,042 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 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 14:59:44,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:59:44,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:44,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 14:59:44,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:44,183 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 14:59:44,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427450640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:44,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:44,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-06-05 14:59:44,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50092559] [2021-06-05 14:59:44,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:59:44,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:44,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:59:44,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:59:44,187 INFO L87 Difference]: Start difference. First operand 128 states and 293 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 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 14:59:44,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:44,259 INFO L93 Difference]: Finished difference Result 150 states and 336 transitions. [2021-06-05 14:59:44,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:59:44,260 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 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 14:59:44,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:44,261 INFO L225 Difference]: With dead ends: 150 [2021-06-05 14:59:44,261 INFO L226 Difference]: Without dead ends: 136 [2021-06-05 14:59:44,261 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 94.4ms TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:59:44,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-06-05 14:59:44,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 120. [2021-06-05 14:59:44,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.2941176470588234) internal successors, (273), 119 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:44,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 273 transitions. [2021-06-05 14:59:44,264 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 273 transitions. Word has length 20 [2021-06-05 14:59:44,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:44,264 INFO L482 AbstractCegarLoop]: Abstraction has 120 states and 273 transitions. [2021-06-05 14:59:44,264 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 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 14:59:44,264 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 273 transitions. [2021-06-05 14:59:44,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:59:44,264 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:44,264 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:44,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 14:59:44,469 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:44,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:44,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1750373120, now seen corresponding path program 4 times [2021-06-05 14:59:44,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:44,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536618391] [2021-06-05 14:59:44,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:44,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:44,523 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:44,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:44,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536618391] [2021-06-05 14:59:44,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536618391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:44,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888508793] [2021-06-05 14:59:44,523 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 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 14:59:44,562 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:59:44,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:44,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:59:44,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:44,678 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:44,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888508793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:44,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:44,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 14:59:44,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205718053] [2021-06-05 14:59:44,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:59:44,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:44,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:59:44,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:59:44,681 INFO L87 Difference]: Start difference. First operand 120 states and 273 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 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 14:59:44,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:44,823 INFO L93 Difference]: Finished difference Result 212 states and 476 transitions. [2021-06-05 14:59:44,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:59:44,823 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 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 22 [2021-06-05 14:59:44,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:44,824 INFO L225 Difference]: With dead ends: 212 [2021-06-05 14:59:44,824 INFO L226 Difference]: Without dead ends: 174 [2021-06-05 14:59:44,825 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 158.6ms TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:59:44,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-06-05 14:59:44,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 142. [2021-06-05 14:59:44,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.3049645390070923) internal successors, (325), 141 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:44,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 325 transitions. [2021-06-05 14:59:44,828 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 325 transitions. Word has length 22 [2021-06-05 14:59:44,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:44,829 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 325 transitions. [2021-06-05 14:59:44,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 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 14:59:44,829 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 325 transitions. [2021-06-05 14:59:44,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:59:44,830 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:44,830 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:45,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:45,041 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:45,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:45,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1768621252, now seen corresponding path program 3 times [2021-06-05 14:59:45,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:45,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218671230] [2021-06-05 14:59:45,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:45,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:45,084 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:45,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:45,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218671230] [2021-06-05 14:59:45,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218671230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:45,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432601207] [2021-06-05 14:59:45,084 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 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 14:59:45,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:59:45,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:45,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:59:45,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:45,225 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:45,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432601207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:45,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:45,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 14:59:45,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148804794] [2021-06-05 14:59:45,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:59:45,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:45,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:59:45,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:59:45,226 INFO L87 Difference]: Start difference. First operand 142 states and 325 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 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 14:59:45,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:45,472 INFO L93 Difference]: Finished difference Result 368 states and 820 transitions. [2021-06-05 14:59:45,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:59:45,472 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 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 22 [2021-06-05 14:59:45,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:45,473 INFO L225 Difference]: With dead ends: 368 [2021-06-05 14:59:45,474 INFO L226 Difference]: Without dead ends: 326 [2021-06-05 14:59:45,474 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 182.0ms TimeCoverageRelationStatistics Valid=163, Invalid=437, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:59:45,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-06-05 14:59:45,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 214. [2021-06-05 14:59:45,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.3896713615023475) internal successors, (509), 213 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:45,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 509 transitions. [2021-06-05 14:59:45,479 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 509 transitions. Word has length 22 [2021-06-05 14:59:45,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:45,479 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 509 transitions. [2021-06-05 14:59:45,479 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 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 14:59:45,479 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 509 transitions. [2021-06-05 14:59:45,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:59:45,480 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:45,480 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:45,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-05 14:59:45,693 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:45,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:45,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1909707008, now seen corresponding path program 3 times [2021-06-05 14:59:45,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:45,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437562259] [2021-06-05 14:59:45,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:45,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:45,749 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:45,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:45,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437562259] [2021-06-05 14:59:45,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437562259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:45,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185762488] [2021-06-05 14:59:45,749 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 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 14:59:45,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:59:45,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:45,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:59:45,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:45,916 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:45,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185762488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:45,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:45,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 14:59:45,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647912529] [2021-06-05 14:59:45,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:59:45,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:45,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:59:45,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:59:45,918 INFO L87 Difference]: Start difference. First operand 214 states and 509 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 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 14:59:46,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:46,063 INFO L93 Difference]: Finished difference Result 284 states and 664 transitions. [2021-06-05 14:59:46,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:59:46,064 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 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 14:59:46,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:46,065 INFO L225 Difference]: With dead ends: 284 [2021-06-05 14:59:46,065 INFO L226 Difference]: Without dead ends: 254 [2021-06-05 14:59:46,065 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 170.2ms TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:59:46,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-06-05 14:59:46,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 230. [2021-06-05 14:59:46,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.3973799126637556) internal successors, (549), 229 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 14:59:46,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 549 transitions. [2021-06-05 14:59:46,069 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 549 transitions. Word has length 22 [2021-06-05 14:59:46,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:46,069 INFO L482 AbstractCegarLoop]: Abstraction has 230 states and 549 transitions. [2021-06-05 14:59:46,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 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 14:59:46,070 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 549 transitions. [2021-06-05 14:59:46,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:59:46,070 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:46,070 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:46,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:46,287 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:46,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:46,287 INFO L82 PathProgramCache]: Analyzing trace with hash 828453442, now seen corresponding path program 4 times [2021-06-05 14:59:46,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:46,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009951434] [2021-06-05 14:59:46,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:46,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:46,352 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:46,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:46,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009951434] [2021-06-05 14:59:46,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009951434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:46,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190209215] [2021-06-05 14:59:46,353 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 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 14:59:46,376 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:59:46,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:46,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:59:46,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:46,512 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:46,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190209215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:46,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:46,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 14:59:46,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801841228] [2021-06-05 14:59:46,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:59:46,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:46,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:59:46,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:59:46,513 INFO L87 Difference]: Start difference. First operand 230 states and 549 transitions. Second operand has 15 states, 15 states have (on average 2.6) 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 14:59:46,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:46,717 INFO L93 Difference]: Finished difference Result 300 states and 708 transitions. [2021-06-05 14:59:46,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:59:46,717 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) 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 24 [2021-06-05 14:59:46,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:46,718 INFO L225 Difference]: With dead ends: 300 [2021-06-05 14:59:46,718 INFO L226 Difference]: Without dead ends: 278 [2021-06-05 14:59:46,719 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 239.9ms TimeCoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:59:46,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-06-05 14:59:46,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 246. [2021-06-05 14:59:46,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.404081632653061) internal successors, (589), 245 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:46,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 589 transitions. [2021-06-05 14:59:46,723 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 589 transitions. Word has length 24 [2021-06-05 14:59:46,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:46,723 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 589 transitions. [2021-06-05 14:59:46,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) 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 14:59:46,723 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 589 transitions. [2021-06-05 14:59:46,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:59:46,724 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:46,724 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:46,939 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 14:59:46,939 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:46,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:46,939 INFO L82 PathProgramCache]: Analyzing trace with hash -902316290, now seen corresponding path program 5 times [2021-06-05 14:59:46,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:46,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295894553] [2021-06-05 14:59:46,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:46,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:46,995 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:46,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:46,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295894553] [2021-06-05 14:59:46,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295894553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:46,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539838470] [2021-06-05 14:59:46,995 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 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 14:59:47,038 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:59:47,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:47,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:59:47,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:47,182 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:47,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539838470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:47,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:47,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 14:59:47,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889968345] [2021-06-05 14:59:47,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:59:47,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:47,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:59:47,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:59:47,184 INFO L87 Difference]: Start difference. First operand 246 states and 589 transitions. Second operand has 15 states, 15 states have (on average 2.6) 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 14:59:47,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:47,395 INFO L93 Difference]: Finished difference Result 324 states and 768 transitions. [2021-06-05 14:59:47,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:59:47,395 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) 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 24 [2021-06-05 14:59:47,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:47,397 INFO L225 Difference]: With dead ends: 324 [2021-06-05 14:59:47,398 INFO L226 Difference]: Without dead ends: 302 [2021-06-05 14:59:47,398 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 243.3ms TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:59:47,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-06-05 14:59:47,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 246. [2021-06-05 14:59:47,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.404081632653061) internal successors, (589), 245 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:47,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 589 transitions. [2021-06-05 14:59:47,402 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 589 transitions. Word has length 24 [2021-06-05 14:59:47,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:47,402 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 589 transitions. [2021-06-05 14:59:47,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) 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 14:59:47,402 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 589 transitions. [2021-06-05 14:59:47,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:59:47,403 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:47,403 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:47,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-06-05 14:59:47,618 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:47,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:47,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1108254722, now seen corresponding path program 6 times [2021-06-05 14:59:47,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:47,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538217930] [2021-06-05 14:59:47,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:47,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:47,678 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:47,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:47,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538217930] [2021-06-05 14:59:47,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538217930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:47,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816714365] [2021-06-05 14:59:47,678 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 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 14:59:47,699 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:59:47,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:47,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:59:47,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:47,833 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:47,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816714365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:47,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:47,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 14:59:47,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665029434] [2021-06-05 14:59:47,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:59:47,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:47,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:59:47,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:59:47,835 INFO L87 Difference]: Start difference. First operand 246 states and 589 transitions. Second operand has 15 states, 15 states have (on average 2.6) 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 14:59:48,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:48,070 INFO L93 Difference]: Finished difference Result 356 states and 840 transitions. [2021-06-05 14:59:48,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:59:48,070 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) 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 24 [2021-06-05 14:59:48,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:48,073 INFO L225 Difference]: With dead ends: 356 [2021-06-05 14:59:48,073 INFO L226 Difference]: Without dead ends: 318 [2021-06-05 14:59:48,074 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 212.5ms TimeCoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:59:48,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-06-05 14:59:48,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 278. [2021-06-05 14:59:48,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 2.4151624548736463) internal successors, (669), 277 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:48,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 669 transitions. [2021-06-05 14:59:48,079 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 669 transitions. Word has length 24 [2021-06-05 14:59:48,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:48,079 INFO L482 AbstractCegarLoop]: Abstraction has 278 states and 669 transitions. [2021-06-05 14:59:48,079 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) 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 14:59:48,079 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 669 transitions. [2021-06-05 14:59:48,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:59:48,080 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:48,080 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:48,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:48,289 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:48,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:48,289 INFO L82 PathProgramCache]: Analyzing trace with hash -920564422, now seen corresponding path program 7 times [2021-06-05 14:59:48,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:48,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985677510] [2021-06-05 14:59:48,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:48,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:48,353 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:48,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:48,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985677510] [2021-06-05 14:59:48,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985677510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:48,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127955898] [2021-06-05 14:59:48,354 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 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 14:59:48,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:48,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:59:48,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:48,542 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:48,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127955898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:48,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:48,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 14:59:48,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306995541] [2021-06-05 14:59:48,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:59:48,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:48,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:59:48,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:59:48,544 INFO L87 Difference]: Start difference. First operand 278 states and 669 transitions. Second operand has 15 states, 15 states have (on average 2.6) 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 14:59:48,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:48,760 INFO L93 Difference]: Finished difference Result 308 states and 732 transitions. [2021-06-05 14:59:48,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:59:48,760 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) 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 24 [2021-06-05 14:59:48,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:48,761 INFO L225 Difference]: With dead ends: 308 [2021-06-05 14:59:48,761 INFO L226 Difference]: Without dead ends: 294 [2021-06-05 14:59:48,761 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 258.6ms TimeCoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:59:48,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-06-05 14:59:48,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 278. [2021-06-05 14:59:48,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 2.4151624548736463) internal successors, (669), 277 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:48,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 669 transitions. [2021-06-05 14:59:48,766 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 669 transitions. Word has length 24 [2021-06-05 14:59:48,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:48,766 INFO L482 AbstractCegarLoop]: Abstraction has 278 states and 669 transitions. [2021-06-05 14:59:48,766 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) 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 14:59:48,766 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 669 transitions. [2021-06-05 14:59:48,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:59:48,767 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:48,767 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:48,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-05 14:59:48,976 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:48,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:48,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1620677442, now seen corresponding path program 8 times [2021-06-05 14:59:48,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:48,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472709422] [2021-06-05 14:59:48,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:48,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:49,030 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:49,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:49,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472709422] [2021-06-05 14:59:49,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472709422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:49,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224454736] [2021-06-05 14:59:49,031 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 14:59:49,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:59:49,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:49,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:59:49,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:49,190 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:49,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224454736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:49,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:49,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 14:59:49,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795808284] [2021-06-05 14:59:49,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:59:49,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:49,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:59:49,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:59:49,191 INFO L87 Difference]: Start difference. First operand 278 states and 669 transitions. Second operand has 15 states, 15 states have (on average 2.6) 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 14:59:49,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:49,416 INFO L93 Difference]: Finished difference Result 348 states and 828 transitions. [2021-06-05 14:59:49,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:59:49,416 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) 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 24 [2021-06-05 14:59:49,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:49,417 INFO L225 Difference]: With dead ends: 348 [2021-06-05 14:59:49,417 INFO L226 Difference]: Without dead ends: 326 [2021-06-05 14:59:49,418 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 237.3ms TimeCoverageRelationStatistics Valid=156, Invalid=546, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:59:49,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-06-05 14:59:49,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 294. [2021-06-05 14:59:49,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.419795221843003) internal successors, (709), 293 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:49,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 709 transitions. [2021-06-05 14:59:49,422 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 709 transitions. Word has length 24 [2021-06-05 14:59:49,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:49,422 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 709 transitions. [2021-06-05 14:59:49,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) 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 14:59:49,422 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 709 transitions. [2021-06-05 14:59:49,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:59:49,423 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:49,423 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:49,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:49,637 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:49,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:49,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1277150090, now seen corresponding path program 9 times [2021-06-05 14:59:49,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:49,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298953420] [2021-06-05 14:59:49,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:49,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:49,702 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:49,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:49,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298953420] [2021-06-05 14:59:49,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298953420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:49,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848836622] [2021-06-05 14:59:49,702 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 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 14:59:49,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:59:49,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:49,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:59:49,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:49,874 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:49,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848836622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:49,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:49,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 14:59:49,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581813081] [2021-06-05 14:59:49,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:59:49,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:49,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:59:49,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:59:49,875 INFO L87 Difference]: Start difference. First operand 294 states and 709 transitions. Second operand has 15 states, 15 states have (on average 2.6) 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 14:59:49,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:49,987 INFO L93 Difference]: Finished difference Result 324 states and 772 transitions. [2021-06-05 14:59:49,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:59:49,988 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) 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 24 [2021-06-05 14:59:49,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:49,989 INFO L225 Difference]: With dead ends: 324 [2021-06-05 14:59:49,989 INFO L226 Difference]: Without dead ends: 310 [2021-06-05 14:59:49,989 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 137.6ms TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:59:49,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-06-05 14:59:50,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 286. [2021-06-05 14:59:50,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.4175438596491228) internal successors, (689), 285 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:50,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 689 transitions. [2021-06-05 14:59:50,007 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 689 transitions. Word has length 24 [2021-06-05 14:59:50,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:50,007 INFO L482 AbstractCegarLoop]: Abstraction has 286 states and 689 transitions. [2021-06-05 14:59:50,007 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) 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 14:59:50,007 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 689 transitions. [2021-06-05 14:59:50,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:59:50,008 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:50,008 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:50,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:50,213 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:50,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:50,213 INFO L82 PathProgramCache]: Analyzing trace with hash 16240442, now seen corresponding path program 10 times [2021-06-05 14:59:50,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:50,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162952345] [2021-06-05 14:59:50,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:50,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:50,268 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:50,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:50,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162952345] [2021-06-05 14:59:50,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162952345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:50,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907224457] [2021-06-05 14:59:50,269 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 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 14:59:50,289 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:59:50,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:50,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:59:50,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:50,506 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:50,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907224457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:50,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:50,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 14:59:50,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756713979] [2021-06-05 14:59:50,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:59:50,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:50,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:59:50,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:59:50,508 INFO L87 Difference]: Start difference. First operand 286 states and 689 transitions. Second operand has 15 states, 15 states have (on average 2.6) 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 14:59:50,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:50,693 INFO L93 Difference]: Finished difference Result 340 states and 812 transitions. [2021-06-05 14:59:50,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:59:50,694 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) 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 24 [2021-06-05 14:59:50,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:50,695 INFO L225 Difference]: With dead ends: 340 [2021-06-05 14:59:50,695 INFO L226 Difference]: Without dead ends: 326 [2021-06-05 14:59:50,695 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 274.2ms TimeCoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:59:50,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-06-05 14:59:50,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 286. [2021-06-05 14:59:50,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.4175438596491228) internal successors, (689), 285 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:50,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 689 transitions. [2021-06-05 14:59:50,700 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 689 transitions. Word has length 24 [2021-06-05 14:59:50,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:50,700 INFO L482 AbstractCegarLoop]: Abstraction has 286 states and 689 transitions. [2021-06-05 14:59:50,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) 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 14:59:50,700 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 689 transitions. [2021-06-05 14:59:50,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:59:50,701 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:50,701 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:50,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:50,917 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:50,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:50,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1448836354, now seen corresponding path program 11 times [2021-06-05 14:59:50,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:50,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361335234] [2021-06-05 14:59:50,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:50,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:50,969 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:50,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:50,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361335234] [2021-06-05 14:59:50,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361335234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:50,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609804506] [2021-06-05 14:59:50,970 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 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 14:59:50,991 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:59:50,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:50,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:59:50,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:51,120 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:51,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609804506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:51,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:51,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 14:59:51,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932206047] [2021-06-05 14:59:51,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:59:51,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:51,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:59:51,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:59:51,121 INFO L87 Difference]: Start difference. First operand 286 states and 689 transitions. Second operand has 15 states, 15 states have (on average 2.6) 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 14:59:51,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:51,401 INFO L93 Difference]: Finished difference Result 356 states and 848 transitions. [2021-06-05 14:59:51,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:59:51,401 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) 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 24 [2021-06-05 14:59:51,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:51,402 INFO L225 Difference]: With dead ends: 356 [2021-06-05 14:59:51,402 INFO L226 Difference]: Without dead ends: 334 [2021-06-05 14:59:51,402 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 264.5ms TimeCoverageRelationStatistics Valid=156, Invalid=546, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:59:51,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-06-05 14:59:51,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 294. [2021-06-05 14:59:51,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.419795221843003) internal successors, (709), 293 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:51,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 709 transitions. [2021-06-05 14:59:51,407 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 709 transitions. Word has length 24 [2021-06-05 14:59:51,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:51,407 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 709 transitions. [2021-06-05 14:59:51,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) 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 14:59:51,407 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 709 transitions. [2021-06-05 14:59:51,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:59:51,407 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:51,407 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:51,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-06-05 14:59:51,608 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:51,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:51,608 INFO L82 PathProgramCache]: Analyzing trace with hash -2007690, now seen corresponding path program 12 times [2021-06-05 14:59:51,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:51,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740498982] [2021-06-05 14:59:51,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:51,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:51,664 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:51,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:51,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740498982] [2021-06-05 14:59:51,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740498982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:51,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531972297] [2021-06-05 14:59:51,664 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 14:59:51,697 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:59:51,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:51,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:59:51,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:51,816 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:51,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531972297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:51,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:51,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 14:59:51,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945857045] [2021-06-05 14:59:51,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:59:51,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:51,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:59:51,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:59:51,818 INFO L87 Difference]: Start difference. First operand 294 states and 709 transitions. Second operand has 15 states, 15 states have (on average 2.6) 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 14:59:52,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:52,017 INFO L93 Difference]: Finished difference Result 332 states and 792 transitions. [2021-06-05 14:59:52,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:59:52,017 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) 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 24 [2021-06-05 14:59:52,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:52,018 INFO L225 Difference]: With dead ends: 332 [2021-06-05 14:59:52,018 INFO L226 Difference]: Without dead ends: 318 [2021-06-05 14:59:52,018 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 185.2ms TimeCoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:59:52,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-06-05 14:59:52,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 286. [2021-06-05 14:59:52,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.4175438596491228) internal successors, (689), 285 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:52,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 689 transitions. [2021-06-05 14:59:52,023 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 689 transitions. Word has length 24 [2021-06-05 14:59:52,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:52,023 INFO L482 AbstractCegarLoop]: Abstraction has 286 states and 689 transitions. [2021-06-05 14:59:52,023 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) 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 14:59:52,023 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 689 transitions. [2021-06-05 14:59:52,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:59:52,023 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:52,023 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:52,239 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-06-05 14:59:52,239 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:52,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:52,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1390424506, now seen corresponding path program 13 times [2021-06-05 14:59:52,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:52,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496792352] [2021-06-05 14:59:52,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:52,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:52,297 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:52,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:52,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496792352] [2021-06-05 14:59:52,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496792352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:52,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303680777] [2021-06-05 14:59:52,298 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 14:59:52,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:52,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:59:52,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:52,473 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:52,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303680777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:52,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:52,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 14:59:52,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923626235] [2021-06-05 14:59:52,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:59:52,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:52,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:59:52,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:59:52,475 INFO L87 Difference]: Start difference. First operand 286 states and 689 transitions. Second operand has 15 states, 15 states have (on average 2.6) 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 14:59:52,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:52,680 INFO L93 Difference]: Finished difference Result 332 states and 788 transitions. [2021-06-05 14:59:52,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:59:52,680 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) 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 24 [2021-06-05 14:59:52,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:52,681 INFO L225 Difference]: With dead ends: 332 [2021-06-05 14:59:52,681 INFO L226 Difference]: Without dead ends: 310 [2021-06-05 14:59:52,681 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 231.2ms TimeCoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:59:52,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-06-05 14:59:52,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 286. [2021-06-05 14:59:52,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.4175438596491228) internal successors, (689), 285 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:52,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 689 transitions. [2021-06-05 14:59:52,686 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 689 transitions. Word has length 24 [2021-06-05 14:59:52,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:52,687 INFO L482 AbstractCegarLoop]: Abstraction has 286 states and 689 transitions. [2021-06-05 14:59:52,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) 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 14:59:52,687 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 689 transitions. [2021-06-05 14:59:52,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:59:52,687 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:52,687 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:52,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:52,906 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:52,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:52,907 INFO L82 PathProgramCache]: Analyzing trace with hash -340345226, now seen corresponding path program 14 times [2021-06-05 14:59:52,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:52,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899228813] [2021-06-05 14:59:52,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:52,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:52,976 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:52,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:52,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899228813] [2021-06-05 14:59:52,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899228813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:52,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974271809] [2021-06-05 14:59:52,976 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 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 14:59:53,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:59:53,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:53,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:59:53,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:53,120 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:53,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974271809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:53,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:53,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 14:59:53,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610598896] [2021-06-05 14:59:53,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:59:53,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:53,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:59:53,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:59:53,121 INFO L87 Difference]: Start difference. First operand 286 states and 689 transitions. Second operand has 15 states, 15 states have (on average 2.6) 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 14:59:53,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:53,252 INFO L93 Difference]: Finished difference Result 308 states and 728 transitions. [2021-06-05 14:59:53,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:59:53,253 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) 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 24 [2021-06-05 14:59:53,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:53,253 INFO L225 Difference]: With dead ends: 308 [2021-06-05 14:59:53,253 INFO L226 Difference]: Without dead ends: 294 [2021-06-05 14:59:53,254 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 184.5ms TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:59:53,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-06-05 14:59:53,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 262. [2021-06-05 14:59:53,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 2.3946360153256707) internal successors, (625), 261 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:53,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 625 transitions. [2021-06-05 14:59:53,258 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 625 transitions. Word has length 24 [2021-06-05 14:59:53,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:53,258 INFO L482 AbstractCegarLoop]: Abstraction has 262 states and 625 transitions. [2021-06-05 14:59:53,258 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) 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 14:59:53,258 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 625 transitions. [2021-06-05 14:59:53,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:59:53,258 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:53,258 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:53,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-06-05 14:59:53,473 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:53,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:53,473 INFO L82 PathProgramCache]: Analyzing trace with hash -546283658, now seen corresponding path program 15 times [2021-06-05 14:59:53,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:53,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140052330] [2021-06-05 14:59:53,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:53,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:53,525 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:53,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:53,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140052330] [2021-06-05 14:59:53,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140052330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:53,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142345066] [2021-06-05 14:59:53,525 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 14:59:53,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:59:53,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:53,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:59:53,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:53,676 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:53,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142345066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:53,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:53,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 14:59:53,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672498323] [2021-06-05 14:59:53,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:59:53,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:53,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:59:53,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:59:53,677 INFO L87 Difference]: Start difference. First operand 262 states and 625 transitions. Second operand has 15 states, 15 states have (on average 2.6) 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 14:59:53,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:53,814 INFO L93 Difference]: Finished difference Result 300 states and 708 transitions. [2021-06-05 14:59:53,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:59:53,814 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) 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 24 [2021-06-05 14:59:53,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:53,815 INFO L225 Difference]: With dead ends: 300 [2021-06-05 14:59:53,815 INFO L226 Difference]: Without dead ends: 286 [2021-06-05 14:59:53,815 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 150.2ms TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:59:53,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-06-05 14:59:53,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 262. [2021-06-05 14:59:53,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 2.3946360153256707) internal successors, (625), 261 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:53,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 625 transitions. [2021-06-05 14:59:53,819 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 625 transitions. Word has length 24 [2021-06-05 14:59:53,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:53,820 INFO L482 AbstractCegarLoop]: Abstraction has 262 states and 625 transitions. [2021-06-05 14:59:53,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) 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 14:59:53,820 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 625 transitions. [2021-06-05 14:59:53,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:59:53,820 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:53,820 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:54,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-06-05 14:59:54,033 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:54,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:54,033 INFO L82 PathProgramCache]: Analyzing trace with hash -358593358, now seen corresponding path program 16 times [2021-06-05 14:59:54,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:54,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474415711] [2021-06-05 14:59:54,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:54,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:54,080 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:54,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:54,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474415711] [2021-06-05 14:59:54,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474415711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:54,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875233749] [2021-06-05 14:59:54,081 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 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 14:59:54,130 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:59:54,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:54,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:59:54,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:54,248 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:54,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875233749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:54,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:54,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 14:59:54,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261791769] [2021-06-05 14:59:54,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:59:54,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:54,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:59:54,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:59:54,249 INFO L87 Difference]: Start difference. First operand 262 states and 625 transitions. Second operand has 15 states, 15 states have (on average 2.6) 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 14:59:54,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:54,445 INFO L93 Difference]: Finished difference Result 340 states and 804 transitions. [2021-06-05 14:59:54,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:59:54,445 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) 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 24 [2021-06-05 14:59:54,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:54,446 INFO L225 Difference]: With dead ends: 340 [2021-06-05 14:59:54,446 INFO L226 Difference]: Without dead ends: 318 [2021-06-05 14:59:54,446 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 236.2ms TimeCoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:59:54,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-06-05 14:59:54,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 270. [2021-06-05 14:59:54,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.3977695167286246) internal successors, (645), 269 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:54,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 645 transitions. [2021-06-05 14:59:54,451 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 645 transitions. Word has length 24 [2021-06-05 14:59:54,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:54,451 INFO L482 AbstractCegarLoop]: Abstraction has 270 states and 645 transitions. [2021-06-05 14:59:54,452 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) 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 14:59:54,452 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 645 transitions. [2021-06-05 14:59:54,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 14:59:54,452 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:54,452 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:54,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:54,681 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:54,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:54,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1945240768, now seen corresponding path program 17 times [2021-06-05 14:59:54,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:54,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738168050] [2021-06-05 14:59:54,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:54,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:54,766 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:54,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:54,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738168050] [2021-06-05 14:59:54,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738168050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:54,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515792131] [2021-06-05 14:59:54,767 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 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 14:59:54,808 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 14:59:54,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:54,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:59:54,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:55,005 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:55,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515792131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:55,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:55,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 14:59:55,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265204552] [2021-06-05 14:59:55,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:59:55,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:55,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:59:55,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:59:55,007 INFO L87 Difference]: Start difference. First operand 270 states and 645 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 14:59:55,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:55,271 INFO L93 Difference]: Finished difference Result 388 states and 920 transitions. [2021-06-05 14:59:55,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:59:55,271 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 26 [2021-06-05 14:59:55,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:55,273 INFO L225 Difference]: With dead ends: 388 [2021-06-05 14:59:55,273 INFO L226 Difference]: Without dead ends: 358 [2021-06-05 14:59:55,273 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 331.8ms TimeCoverageRelationStatistics Valid=171, Invalid=585, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:59:55,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-06-05 14:59:55,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 278. [2021-06-05 14:59:55,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 2.4007220216606497) internal successors, (665), 277 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:55,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 665 transitions. [2021-06-05 14:59:55,277 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 665 transitions. Word has length 26 [2021-06-05 14:59:55,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:55,277 INFO L482 AbstractCegarLoop]: Abstraction has 278 states and 665 transitions. [2021-06-05 14:59:55,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 14:59:55,277 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 665 transitions. [2021-06-05 14:59:55,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 14:59:55,278 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:55,278 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:55,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-06-05 14:59:55,493 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:55,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:55,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1787202428, now seen corresponding path program 18 times [2021-06-05 14:59:55,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:55,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505566187] [2021-06-05 14:59:55,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:55,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:55,554 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:55,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:55,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505566187] [2021-06-05 14:59:55,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505566187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:55,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938533031] [2021-06-05 14:59:55,554 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 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 14:59:55,576 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 14:59:55,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:55,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:59:55,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:55,734 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:55,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938533031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:55,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:55,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 14:59:55,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706622108] [2021-06-05 14:59:55,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:59:55,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:55,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:59:55,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:59:55,741 INFO L87 Difference]: Start difference. First operand 278 states and 665 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 14:59:56,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:56,003 INFO L93 Difference]: Finished difference Result 452 states and 1076 transitions. [2021-06-05 14:59:56,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:59:56,004 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 26 [2021-06-05 14:59:56,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:56,005 INFO L225 Difference]: With dead ends: 452 [2021-06-05 14:59:56,005 INFO L226 Difference]: Without dead ends: 414 [2021-06-05 14:59:56,006 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 309.3ms TimeCoverageRelationStatistics Valid=186, Invalid=626, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:59:56,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-06-05 14:59:56,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 310. [2021-06-05 14:59:56,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.411003236245955) internal successors, (745), 309 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:56,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 745 transitions. [2021-06-05 14:59:56,011 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 745 transitions. Word has length 26 [2021-06-05 14:59:56,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:56,011 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 745 transitions. [2021-06-05 14:59:56,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 14:59:56,011 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 745 transitions. [2021-06-05 14:59:56,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 14:59:56,011 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:56,011 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:56,226 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:56,227 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:56,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:56,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1974892728, now seen corresponding path program 19 times [2021-06-05 14:59:56,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:56,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389789782] [2021-06-05 14:59:56,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:56,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:56,301 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:56,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:56,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389789782] [2021-06-05 14:59:56,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389789782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:56,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535794030] [2021-06-05 14:59:56,302 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 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 14:59:56,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:56,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:59:56,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:56,528 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:56,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535794030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:56,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:56,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 14:59:56,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113811867] [2021-06-05 14:59:56,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:59:56,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:56,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:59:56,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:59:56,529 INFO L87 Difference]: Start difference. First operand 310 states and 745 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 14:59:56,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:56,798 INFO L93 Difference]: Finished difference Result 536 states and 1240 transitions. [2021-06-05 14:59:56,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:59:56,798 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 26 [2021-06-05 14:59:56,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:56,800 INFO L225 Difference]: With dead ends: 536 [2021-06-05 14:59:56,800 INFO L226 Difference]: Without dead ends: 494 [2021-06-05 14:59:56,800 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 334.1ms TimeCoverageRelationStatistics Valid=183, Invalid=573, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:59:56,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-06-05 14:59:56,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 342. [2021-06-05 14:59:56,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 2.43108504398827) internal successors, (829), 341 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:56,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 829 transitions. [2021-06-05 14:59:56,805 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 829 transitions. Word has length 26 [2021-06-05 14:59:56,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:56,806 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 829 transitions. [2021-06-05 14:59:56,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 14:59:56,806 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 829 transitions. [2021-06-05 14:59:56,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 14:59:56,806 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:56,806 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:57,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable160 [2021-06-05 14:59:57,021 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:57,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:57,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1803206464, now seen corresponding path program 20 times [2021-06-05 14:59:57,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:57,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193136040] [2021-06-05 14:59:57,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:57,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:57,077 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:57,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:57,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193136040] [2021-06-05 14:59:57,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193136040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:57,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88512761] [2021-06-05 14:59:57,078 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 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 14:59:57,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:59:57,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:57,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:59:57,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:57,265 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:57,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88512761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:57,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:57,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 14:59:57,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051244489] [2021-06-05 14:59:57,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:59:57,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:57,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:59:57,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:59:57,267 INFO L87 Difference]: Start difference. First operand 342 states and 829 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 14:59:57,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:57,477 INFO L93 Difference]: Finished difference Result 460 states and 1104 transitions. [2021-06-05 14:59:57,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:59:57,478 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 26 [2021-06-05 14:59:57,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:57,479 INFO L225 Difference]: With dead ends: 460 [2021-06-05 14:59:57,479 INFO L226 Difference]: Without dead ends: 430 [2021-06-05 14:59:57,480 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 227.6ms TimeCoverageRelationStatistics Valid=162, Invalid=594, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:59:57,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-06-05 14:59:57,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 350. [2021-06-05 14:59:57,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 2.432664756446991) internal successors, (849), 349 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:57,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 849 transitions. [2021-06-05 14:59:57,485 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 849 transitions. Word has length 26 [2021-06-05 14:59:57,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:57,486 INFO L482 AbstractCegarLoop]: Abstraction has 350 states and 849 transitions. [2021-06-05 14:59:57,486 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 14:59:57,486 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 849 transitions. [2021-06-05 14:59:57,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 14:59:57,486 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:57,486 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:57,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:57,693 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:57,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:57,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1232622468, now seen corresponding path program 21 times [2021-06-05 14:59:57,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:57,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475711979] [2021-06-05 14:59:57,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:57,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:57,752 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:57,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:57,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475711979] [2021-06-05 14:59:57,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475711979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:57,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118084119] [2021-06-05 14:59:57,753 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 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 14:59:57,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:59:57,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:57,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:59:57,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:57,945 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:57,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118084119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:57,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:57,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 14:59:57,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519999905] [2021-06-05 14:59:57,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:59:57,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:57,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:59:57,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:59:57,946 INFO L87 Difference]: Start difference. First operand 350 states and 849 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 14:59:58,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:58,199 INFO L93 Difference]: Finished difference Result 492 states and 1180 transitions. [2021-06-05 14:59:58,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:59:58,199 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 26 [2021-06-05 14:59:58,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:58,200 INFO L225 Difference]: With dead ends: 492 [2021-06-05 14:59:58,201 INFO L226 Difference]: Without dead ends: 454 [2021-06-05 14:59:58,201 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 301.4ms TimeCoverageRelationStatistics Valid=172, Invalid=584, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:59:58,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-06-05 14:59:58,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 358. [2021-06-05 14:59:58,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 2.434173669467787) internal successors, (869), 357 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:58,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 869 transitions. [2021-06-05 14:59:58,206 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 869 transitions. Word has length 26 [2021-06-05 14:59:58,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:58,206 INFO L482 AbstractCegarLoop]: Abstraction has 358 states and 869 transitions. [2021-06-05 14:59:58,206 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 14:59:58,206 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 869 transitions. [2021-06-05 14:59:58,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 14:59:58,206 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:58,206 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:58,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable181 [2021-06-05 14:59:58,421 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:58,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:58,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1044932168, now seen corresponding path program 22 times [2021-06-05 14:59:58,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:58,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617641370] [2021-06-05 14:59:58,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:58,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:58,480 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:58,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:58,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617641370] [2021-06-05 14:59:58,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617641370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:58,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890777809] [2021-06-05 14:59:58,480 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 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 14:59:58,522 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:59:58,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:58,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:59:58,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:58,712 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:58,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890777809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:58,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:58,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 14:59:58,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504535582] [2021-06-05 14:59:58,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:59:58,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:58,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:59:58,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:59:58,713 INFO L87 Difference]: Start difference. First operand 358 states and 869 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 14:59:58,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:58,986 INFO L93 Difference]: Finished difference Result 548 states and 1324 transitions. [2021-06-05 14:59:58,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:59:58,986 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 26 [2021-06-05 14:59:58,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:58,988 INFO L225 Difference]: With dead ends: 548 [2021-06-05 14:59:58,988 INFO L226 Difference]: Without dead ends: 518 [2021-06-05 14:59:58,988 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 338.6ms TimeCoverageRelationStatistics Valid=199, Invalid=671, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:59:58,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-06-05 14:59:58,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 390. [2021-06-05 14:59:58,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 2.4395886889460154) internal successors, (949), 389 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 14:59:58,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 949 transitions. [2021-06-05 14:59:58,993 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 949 transitions. Word has length 26 [2021-06-05 14:59:58,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:58,993 INFO L482 AbstractCegarLoop]: Abstraction has 390 states and 949 transitions. [2021-06-05 14:59:58,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 14:59:58,993 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 949 transitions. [2021-06-05 14:59:58,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 14:59:58,994 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:58,994 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:59,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:59,209 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:59,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:59,210 INFO L82 PathProgramCache]: Analyzing trace with hash -1570960004, now seen corresponding path program 23 times [2021-06-05 14:59:59,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:59,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385715074] [2021-06-05 14:59:59,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:59,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:59,268 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:59,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:59,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385715074] [2021-06-05 14:59:59,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385715074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:59,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600178265] [2021-06-05 14:59:59,268 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 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 14:59:59,289 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:59:59,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:59,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:59:59,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:59,482 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:59,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600178265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:59,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:59,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 14:59:59,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010867175] [2021-06-05 14:59:59,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:59:59,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:59,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:59:59,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:59:59,484 INFO L87 Difference]: Start difference. First operand 390 states and 949 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 14:59:59,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:59,852 INFO L93 Difference]: Finished difference Result 556 states and 1340 transitions. [2021-06-05 14:59:59,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:59:59,853 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 26 [2021-06-05 14:59:59,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:59,854 INFO L225 Difference]: With dead ends: 556 [2021-06-05 14:59:59,854 INFO L226 Difference]: Without dead ends: 518 [2021-06-05 14:59:59,855 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 420.2ms TimeCoverageRelationStatistics Valid=214, Invalid=716, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:59:59,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-06-05 14:59:59,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 398. [2021-06-05 14:59:59,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 2.44080604534005) internal successors, (969), 397 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 14:59:59,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 969 transitions. [2021-06-05 14:59:59,860 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 969 transitions. Word has length 26 [2021-06-05 14:59:59,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:59,860 INFO L482 AbstractCegarLoop]: Abstraction has 398 states and 969 transitions. [2021-06-05 14:59:59,861 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 14:59:59,861 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 969 transitions. [2021-06-05 14:59:59,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 14:59:59,861 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:59,861 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:00,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-06-05 15:00:00,077 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:00,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:00,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1383269704, now seen corresponding path program 24 times [2021-06-05 15:00:00,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:00,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398681477] [2021-06-05 15:00:00,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:00,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:00,150 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:00,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:00,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398681477] [2021-06-05 15:00:00,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398681477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:00,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482168760] [2021-06-05 15:00:00,151 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 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 15:00:00,176 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 15:00:00,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:00,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 15:00:00,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:00,347 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:00,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482168760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:00,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:00,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 15:00:00,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022298759] [2021-06-05 15:00:00,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:00:00,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:00,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:00:00,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:00:00,348 INFO L87 Difference]: Start difference. First operand 398 states and 969 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 15:00:00,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:00,578 INFO L93 Difference]: Finished difference Result 548 states and 1324 transitions. [2021-06-05 15:00:00,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 15:00:00,579 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 26 [2021-06-05 15:00:00,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:00,580 INFO L225 Difference]: With dead ends: 548 [2021-06-05 15:00:00,580 INFO L226 Difference]: Without dead ends: 518 [2021-06-05 15:00:00,580 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 288.2ms TimeCoverageRelationStatistics Valid=140, Invalid=510, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:00:00,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-06-05 15:00:00,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 398. [2021-06-05 15:00:00,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 2.44080604534005) internal successors, (969), 397 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 15:00:00,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 969 transitions. [2021-06-05 15:00:00,585 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 969 transitions. Word has length 26 [2021-06-05 15:00:00,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:00,585 INFO L482 AbstractCegarLoop]: Abstraction has 398 states and 969 transitions. [2021-06-05 15:00:00,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 15:00:00,586 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 969 transitions. [2021-06-05 15:00:00,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:00:00,586 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:00,586 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:00,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable212,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:00,801 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:00,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:00,801 INFO L82 PathProgramCache]: Analyzing trace with hash 319483004, now seen corresponding path program 25 times [2021-06-05 15:00:00,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:00,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396545207] [2021-06-05 15:00:00,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:00,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:00,849 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:00,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:00,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396545207] [2021-06-05 15:00:00,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396545207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:00,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133414881] [2021-06-05 15:00:00,850 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 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 15:00:00,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:00,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 15:00:00,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:01,032 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:01,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133414881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:01,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:01,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 15:00:01,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365670370] [2021-06-05 15:00:01,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:00:01,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:01,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:00:01,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:00:01,033 INFO L87 Difference]: Start difference. First operand 398 states and 969 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 15:00:01,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:01,278 INFO L93 Difference]: Finished difference Result 508 states and 1224 transitions. [2021-06-05 15:00:01,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 15:00:01,279 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 26 [2021-06-05 15:00:01,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:01,280 INFO L225 Difference]: With dead ends: 508 [2021-06-05 15:00:01,280 INFO L226 Difference]: Without dead ends: 478 [2021-06-05 15:00:01,280 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 248.0ms TimeCoverageRelationStatistics Valid=163, Invalid=593, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:00:01,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2021-06-05 15:00:01,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 406. [2021-06-05 15:00:01,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 2.4419753086419753) internal successors, (989), 405 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:01,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 989 transitions. [2021-06-05 15:00:01,287 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 989 transitions. Word has length 26 [2021-06-05 15:00:01,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:01,288 INFO L482 AbstractCegarLoop]: Abstraction has 406 states and 989 transitions. [2021-06-05 15:00:01,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 15:00:01,288 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 989 transitions. [2021-06-05 15:00:01,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:00:01,288 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:01,288 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:01,494 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-06-05 15:00:01,495 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:01,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:01,495 INFO L82 PathProgramCache]: Analyzing trace with hash 113544572, now seen corresponding path program 26 times [2021-06-05 15:00:01,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:01,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202991228] [2021-06-05 15:00:01,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:01,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:01,552 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:01,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:01,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202991228] [2021-06-05 15:00:01,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202991228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:01,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396504184] [2021-06-05 15:00:01,553 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 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 15:00:01,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:00:01,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:01,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 15:00:01,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:01,787 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:01,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396504184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:01,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:01,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 15:00:01,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312234237] [2021-06-05 15:00:01,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:00:01,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:01,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:00:01,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:00:01,788 INFO L87 Difference]: Start difference. First operand 406 states and 989 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 15:00:02,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:02,105 INFO L93 Difference]: Finished difference Result 548 states and 1320 transitions. [2021-06-05 15:00:02,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 15:00:02,105 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 26 [2021-06-05 15:00:02,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:02,106 INFO L225 Difference]: With dead ends: 548 [2021-06-05 15:00:02,106 INFO L226 Difference]: Without dead ends: 510 [2021-06-05 15:00:02,107 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 360.1ms TimeCoverageRelationStatistics Valid=189, Invalid=623, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:00:02,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-06-05 15:00:02,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 422. [2021-06-05 15:00:02,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 421 states have (on average 2.4441805225653206) internal successors, (1029), 421 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 15:00:02,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 1029 transitions. [2021-06-05 15:00:02,112 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 1029 transitions. Word has length 26 [2021-06-05 15:00:02,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:02,112 INFO L482 AbstractCegarLoop]: Abstraction has 422 states and 1029 transitions. [2021-06-05 15:00:02,112 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 15:00:02,112 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 1029 transitions. [2021-06-05 15:00:02,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:00:02,113 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:02,113 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:02,326 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable231 [2021-06-05 15:00:02,326 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:02,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:02,327 INFO L82 PathProgramCache]: Analyzing trace with hash -224792964, now seen corresponding path program 27 times [2021-06-05 15:00:02,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:02,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804762995] [2021-06-05 15:00:02,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:02,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:02,379 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:02,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:02,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804762995] [2021-06-05 15:00:02,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804762995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:02,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172638222] [2021-06-05 15:00:02,380 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 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 15:00:02,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:00:02,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:02,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 15:00:02,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:02,668 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:02,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172638222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:02,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:02,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 15:00:02,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616701629] [2021-06-05 15:00:02,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:00:02,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:02,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:00:02,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:00:02,670 INFO L87 Difference]: Start difference. First operand 422 states and 1029 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 15:00:03,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:03,075 INFO L93 Difference]: Finished difference Result 588 states and 1420 transitions. [2021-06-05 15:00:03,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 15:00:03,075 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 26 [2021-06-05 15:00:03,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:03,077 INFO L225 Difference]: With dead ends: 588 [2021-06-05 15:00:03,077 INFO L226 Difference]: Without dead ends: 550 [2021-06-05 15:00:03,077 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 440.9ms TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:00:03,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-06-05 15:00:03,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 438. [2021-06-05 15:00:03,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 2.446224256292906) internal successors, (1069), 437 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:03,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 1069 transitions. [2021-06-05 15:00:03,082 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 1069 transitions. Word has length 26 [2021-06-05 15:00:03,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:03,082 INFO L482 AbstractCegarLoop]: Abstraction has 438 states and 1069 transitions. [2021-06-05 15:00:03,082 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 15:00:03,082 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 1069 transitions. [2021-06-05 15:00:03,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:00:03,083 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:03,083 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:03,298 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2021-06-05 15:00:03,298 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:03,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:03,299 INFO L82 PathProgramCache]: Analyzing trace with hash -37102664, now seen corresponding path program 28 times [2021-06-05 15:00:03,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:03,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153295553] [2021-06-05 15:00:03,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:03,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:03,408 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:03,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:03,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153295553] [2021-06-05 15:00:03,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153295553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:03,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887349004] [2021-06-05 15:00:03,409 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 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 15:00:03,432 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:00:03,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:03,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 15:00:03,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:03,750 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:03,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887349004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:03,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:03,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 15:00:03,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435824897] [2021-06-05 15:00:03,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:00:03,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:03,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:00:03,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:00:03,752 INFO L87 Difference]: Start difference. First operand 438 states and 1069 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 15:00:04,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:04,107 INFO L93 Difference]: Finished difference Result 720 states and 1704 transitions. [2021-06-05 15:00:04,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:00:04,107 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 26 [2021-06-05 15:00:04,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:04,109 INFO L225 Difference]: With dead ends: 720 [2021-06-05 15:00:04,109 INFO L226 Difference]: Without dead ends: 678 [2021-06-05 15:00:04,110 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 443.3ms TimeCoverageRelationStatistics Valid=212, Invalid=658, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:00:04,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2021-06-05 15:00:04,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 446. [2021-06-05 15:00:04,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 445 states have (on average 2.447191011235955) internal successors, (1089), 445 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:04,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 1089 transitions. [2021-06-05 15:00:04,116 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 1089 transitions. Word has length 26 [2021-06-05 15:00:04,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:04,116 INFO L482 AbstractCegarLoop]: Abstraction has 446 states and 1089 transitions. [2021-06-05 15:00:04,116 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 15:00:04,116 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 1089 transitions. [2021-06-05 15:00:04,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:00:04,117 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:04,117 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:04,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:04,327 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:04,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:04,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1675418936, now seen corresponding path program 29 times [2021-06-05 15:00:04,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:04,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137019774] [2021-06-05 15:00:04,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:04,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:04,392 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:04,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:04,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137019774] [2021-06-05 15:00:04,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137019774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:04,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653421211] [2021-06-05 15:00:04,392 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 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 15:00:04,416 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 15:00:04,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:04,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 15:00:04,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:04,647 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:04,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653421211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:04,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:04,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 15:00:04,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924525166] [2021-06-05 15:00:04,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:00:04,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:04,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:00:04,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:00:04,648 INFO L87 Difference]: Start difference. First operand 446 states and 1089 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 15:00:05,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:05,043 INFO L93 Difference]: Finished difference Result 634 states and 1499 transitions. [2021-06-05 15:00:05,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:00:05,044 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 26 [2021-06-05 15:00:05,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:05,045 INFO L225 Difference]: With dead ends: 634 [2021-06-05 15:00:05,045 INFO L226 Difference]: Without dead ends: 604 [2021-06-05 15:00:05,046 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 396.2ms TimeCoverageRelationStatistics Valid=170, Invalid=642, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:00:05,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-06-05 15:00:05,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 470. [2021-06-05 15:00:05,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 2.458422174840085) internal successors, (1153), 469 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:05,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 1153 transitions. [2021-06-05 15:00:05,052 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 1153 transitions. Word has length 26 [2021-06-05 15:00:05,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:05,052 INFO L482 AbstractCegarLoop]: Abstraction has 470 states and 1153 transitions. [2021-06-05 15:00:05,052 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 15:00:05,052 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 1153 transitions. [2021-06-05 15:00:05,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:00:05,053 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:05,053 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:05,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:05,269 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:05,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:05,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1238039736, now seen corresponding path program 30 times [2021-06-05 15:00:05,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:05,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772688561] [2021-06-05 15:00:05,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:05,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:05,364 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:05,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:05,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772688561] [2021-06-05 15:00:05,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772688561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:05,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114053719] [2021-06-05 15:00:05,364 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 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 15:00:05,405 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:00:05,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:05,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 15:00:05,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:05,613 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:05,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114053719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:05,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:05,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 15:00:05,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823289337] [2021-06-05 15:00:05,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:00:05,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:05,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:00:05,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:00:05,615 INFO L87 Difference]: Start difference. First operand 470 states and 1153 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 15:00:06,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:06,073 INFO L93 Difference]: Finished difference Result 636 states and 1548 transitions. [2021-06-05 15:00:06,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 15:00:06,074 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 26 [2021-06-05 15:00:06,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:06,075 INFO L225 Difference]: With dead ends: 636 [2021-06-05 15:00:06,075 INFO L226 Difference]: Without dead ends: 606 [2021-06-05 15:00:06,075 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 517.9ms TimeCoverageRelationStatistics Valid=176, Invalid=636, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:00:06,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2021-06-05 15:00:06,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 486. [2021-06-05 15:00:06,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 485 states have (on average 2.45979381443299) internal successors, (1193), 485 states have internal predecessors, (1193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:06,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 1193 transitions. [2021-06-05 15:00:06,081 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 1193 transitions. Word has length 26 [2021-06-05 15:00:06,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:06,082 INFO L482 AbstractCegarLoop]: Abstraction has 486 states and 1193 transitions. [2021-06-05 15:00:06,082 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 15:00:06,082 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 1193 transitions. [2021-06-05 15:00:06,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:00:06,082 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:06,082 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:06,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable270 [2021-06-05 15:00:06,297 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:06,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:06,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1700991628, now seen corresponding path program 31 times [2021-06-05 15:00:06,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:06,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024190576] [2021-06-05 15:00:06,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:06,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:06,375 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:06,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:06,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024190576] [2021-06-05 15:00:06,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024190576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:06,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041546579] [2021-06-05 15:00:06,375 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 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 15:00:06,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:06,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 15:00:06,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:06,683 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:06,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041546579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:06,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:06,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 15:00:06,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56367005] [2021-06-05 15:00:06,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:00:06,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:06,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:00:06,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:00:06,685 INFO L87 Difference]: Start difference. First operand 486 states and 1193 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 15:00:06,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:06,976 INFO L93 Difference]: Finished difference Result 604 states and 1468 transitions. [2021-06-05 15:00:06,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 15:00:06,976 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 26 [2021-06-05 15:00:06,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:06,979 INFO L225 Difference]: With dead ends: 604 [2021-06-05 15:00:06,979 INFO L226 Difference]: Without dead ends: 574 [2021-06-05 15:00:06,979 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 407.4ms TimeCoverageRelationStatistics Valid=171, Invalid=585, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:00:06,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-06-05 15:00:06,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 486. [2021-06-05 15:00:06,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 485 states have (on average 2.45979381443299) internal successors, (1193), 485 states have internal predecessors, (1193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:06,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 1193 transitions. [2021-06-05 15:00:06,985 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 1193 transitions. Word has length 26 [2021-06-05 15:00:06,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:06,985 INFO L482 AbstractCegarLoop]: Abstraction has 486 states and 1193 transitions. [2021-06-05 15:00:06,985 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 15:00:06,985 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 1193 transitions. [2021-06-05 15:00:06,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 15:00:06,986 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:06,986 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:07,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:07,201 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:07,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:07,201 INFO L82 PathProgramCache]: Analyzing trace with hash 638992838, now seen corresponding path program 5 times [2021-06-05 15:00:07,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:07,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549677884] [2021-06-05 15:00:07,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:07,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:07,285 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:07,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:07,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549677884] [2021-06-05 15:00:07,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549677884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:07,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209286341] [2021-06-05 15:00:07,285 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 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 15:00:07,310 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 15:00:07,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:07,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 15:00:07,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:07,553 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:07,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209286341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:07,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:07,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:00:07,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330046681] [2021-06-05 15:00:07,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:00:07,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:07,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:00:07,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:00:07,554 INFO L87 Difference]: Start difference. First operand 486 states and 1193 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 15:00:07,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:07,907 INFO L93 Difference]: Finished difference Result 554 states and 1340 transitions. [2021-06-05 15:00:07,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 15:00:07,908 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-06-05 15:00:07,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:07,914 INFO L225 Difference]: With dead ends: 554 [2021-06-05 15:00:07,914 INFO L226 Difference]: Without dead ends: 524 [2021-06-05 15:00:07,914 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 473.6ms TimeCoverageRelationStatistics Valid=165, Invalid=647, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:00:07,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2021-06-05 15:00:07,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 500. [2021-06-05 15:00:07,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 499 states have (on average 2.4549098196392785) internal successors, (1225), 499 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:07,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 1225 transitions. [2021-06-05 15:00:07,919 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 1225 transitions. Word has length 28 [2021-06-05 15:00:07,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:07,919 INFO L482 AbstractCegarLoop]: Abstraction has 500 states and 1225 transitions. [2021-06-05 15:00:07,919 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 15:00:07,920 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 1225 transitions. [2021-06-05 15:00:07,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 15:00:07,920 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:07,920 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:08,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:08,137 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:08,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:08,138 INFO L82 PathProgramCache]: Analyzing trace with hash 808435006, now seen corresponding path program 32 times [2021-06-05 15:00:08,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:08,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564058068] [2021-06-05 15:00:08,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:08,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:08,279 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:08,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:08,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564058068] [2021-06-05 15:00:08,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564058068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:08,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332328688] [2021-06-05 15:00:08,280 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 15:00:08,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:00:08,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:08,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 15:00:08,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:08,585 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:08,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332328688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:08,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:08,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:00:08,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903162191] [2021-06-05 15:00:08,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:00:08,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:08,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:00:08,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:00:08,586 INFO L87 Difference]: Start difference. First operand 500 states and 1225 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 15:00:09,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:09,068 INFO L93 Difference]: Finished difference Result 650 states and 1584 transitions. [2021-06-05 15:00:09,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:00:09,069 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-06-05 15:00:09,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:09,071 INFO L225 Difference]: With dead ends: 650 [2021-06-05 15:00:09,071 INFO L226 Difference]: Without dead ends: 628 [2021-06-05 15:00:09,071 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 624.1ms TimeCoverageRelationStatistics Valid=204, Invalid=918, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:00:09,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2021-06-05 15:00:09,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 508. [2021-06-05 15:00:09,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 507 states have (on average 2.455621301775148) internal successors, (1245), 507 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:09,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 1245 transitions. [2021-06-05 15:00:09,078 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 1245 transitions. Word has length 28 [2021-06-05 15:00:09,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:09,078 INFO L482 AbstractCegarLoop]: Abstraction has 508 states and 1245 transitions. [2021-06-05 15:00:09,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 15:00:09,078 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 1245 transitions. [2021-06-05 15:00:09,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 15:00:09,079 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:09,079 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:09,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable303 [2021-06-05 15:00:09,295 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:09,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:09,295 INFO L82 PathProgramCache]: Analyzing trace with hash -945290426, now seen corresponding path program 33 times [2021-06-05 15:00:09,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:09,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59227547] [2021-06-05 15:00:09,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:09,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:09,395 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:09,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:09,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59227547] [2021-06-05 15:00:09,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59227547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:09,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582348736] [2021-06-05 15:00:09,395 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 15:00:09,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 15:00:09,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:09,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 15:00:09,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:09,737 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:09,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582348736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:09,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:09,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:00:09,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387959366] [2021-06-05 15:00:09,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:00:09,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:09,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:00:09,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:00:09,738 INFO L87 Difference]: Start difference. First operand 508 states and 1245 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 15:00:10,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:10,227 INFO L93 Difference]: Finished difference Result 706 states and 1716 transitions. [2021-06-05 15:00:10,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:00:10,228 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-06-05 15:00:10,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:10,230 INFO L225 Difference]: With dead ends: 706 [2021-06-05 15:00:10,230 INFO L226 Difference]: Without dead ends: 668 [2021-06-05 15:00:10,230 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 587.9ms TimeCoverageRelationStatistics Valid=263, Invalid=997, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:00:10,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2021-06-05 15:00:10,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 556. [2021-06-05 15:00:10,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 555 states have (on average 2.4594594594594597) internal successors, (1365), 555 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:10,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 1365 transitions. [2021-06-05 15:00:10,237 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 1365 transitions. Word has length 28 [2021-06-05 15:00:10,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:10,237 INFO L482 AbstractCegarLoop]: Abstraction has 556 states and 1365 transitions. [2021-06-05 15:00:10,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 15:00:10,237 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 1365 transitions. [2021-06-05 15:00:10,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 15:00:10,238 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:10,238 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:10,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable316,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:10,454 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:10,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:10,454 INFO L82 PathProgramCache]: Analyzing trace with hash 282407170, now seen corresponding path program 34 times [2021-06-05 15:00:10,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:10,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298587133] [2021-06-05 15:00:10,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:10,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:10,631 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:10,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:10,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298587133] [2021-06-05 15:00:10,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298587133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:10,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556907476] [2021-06-05 15:00:10,632 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 15:00:10,655 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:00:10,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:10,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 15:00:10,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:10,927 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:10,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556907476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:10,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:10,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:00:10,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865588294] [2021-06-05 15:00:10,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:00:10,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:10,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:00:10,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:00:10,928 INFO L87 Difference]: Start difference. First operand 556 states and 1365 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 15:00:11,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:11,344 INFO L93 Difference]: Finished difference Result 674 states and 1636 transitions. [2021-06-05 15:00:11,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 15:00:11,345 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-06-05 15:00:11,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:11,346 INFO L225 Difference]: With dead ends: 674 [2021-06-05 15:00:11,346 INFO L226 Difference]: Without dead ends: 636 [2021-06-05 15:00:11,347 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 573.0ms TimeCoverageRelationStatistics Valid=159, Invalid=771, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:00:11,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2021-06-05 15:00:11,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 556. [2021-06-05 15:00:11,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 555 states have (on average 2.4594594594594597) internal successors, (1365), 555 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:11,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 1365 transitions. [2021-06-05 15:00:11,353 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 1365 transitions. Word has length 28 [2021-06-05 15:00:11,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:11,354 INFO L482 AbstractCegarLoop]: Abstraction has 556 states and 1365 transitions. [2021-06-05 15:00:11,354 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 15:00:11,354 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 1365 transitions. [2021-06-05 15:00:11,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 15:00:11,354 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:11,354 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:11,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable326 [2021-06-05 15:00:11,568 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:11,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:11,568 INFO L82 PathProgramCache]: Analyzing trace with hash 470097470, now seen corresponding path program 35 times [2021-06-05 15:00:11,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:11,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805096610] [2021-06-05 15:00:11,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:11,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:11,660 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:11,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:11,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805096610] [2021-06-05 15:00:11,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805096610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:11,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649130054] [2021-06-05 15:00:11,660 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 15:00:11,683 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 15:00:11,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:11,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 15:00:11,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:11,950 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:11,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649130054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:11,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:11,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:00:11,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796255464] [2021-06-05 15:00:11,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:00:11,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:11,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:00:11,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:00:11,951 INFO L87 Difference]: Start difference. First operand 556 states and 1365 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 15:00:12,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:12,329 INFO L93 Difference]: Finished difference Result 714 states and 1740 transitions. [2021-06-05 15:00:12,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 15:00:12,329 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-06-05 15:00:12,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:12,331 INFO L225 Difference]: With dead ends: 714 [2021-06-05 15:00:12,331 INFO L226 Difference]: Without dead ends: 684 [2021-06-05 15:00:12,331 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 461.5ms TimeCoverageRelationStatistics Valid=178, Invalid=814, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:00:12,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2021-06-05 15:00:12,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 564. [2021-06-05 15:00:12,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 563 states have (on average 2.4600355239786857) internal successors, (1385), 563 states have internal predecessors, (1385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:12,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 1385 transitions. [2021-06-05 15:00:12,337 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 1385 transitions. Word has length 28 [2021-06-05 15:00:12,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:12,337 INFO L482 AbstractCegarLoop]: Abstraction has 564 states and 1385 transitions. [2021-06-05 15:00:12,337 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 15:00:12,337 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 1385 transitions. [2021-06-05 15:00:12,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 15:00:12,338 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:12,338 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:12,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable338,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:12,554 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:12,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:12,555 INFO L82 PathProgramCache]: Analyzing trace with hash 264159038, now seen corresponding path program 36 times [2021-06-05 15:00:12,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:12,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465235098] [2021-06-05 15:00:12,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:12,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:12,685 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:12,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:12,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465235098] [2021-06-05 15:00:12,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465235098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:12,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411983009] [2021-06-05 15:00:12,685 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 15:00:12,709 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 15:00:12,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:12,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 15:00:12,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:12,911 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:12,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411983009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:12,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:12,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:00:12,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548802334] [2021-06-05 15:00:12,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:00:12,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:12,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:00:12,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:00:12,912 INFO L87 Difference]: Start difference. First operand 564 states and 1385 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 15:00:13,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:13,359 INFO L93 Difference]: Finished difference Result 722 states and 1760 transitions. [2021-06-05 15:00:13,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:00:13,360 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-06-05 15:00:13,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:13,361 INFO L225 Difference]: With dead ends: 722 [2021-06-05 15:00:13,361 INFO L226 Difference]: Without dead ends: 692 [2021-06-05 15:00:13,362 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 577.0ms TimeCoverageRelationStatistics Valid=216, Invalid=906, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:00:13,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2021-06-05 15:00:13,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 572. [2021-06-05 15:00:13,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 571 states have (on average 2.460595446584939) internal successors, (1405), 571 states have internal predecessors, (1405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:13,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 1405 transitions. [2021-06-05 15:00:13,368 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 1405 transitions. Word has length 28 [2021-06-05 15:00:13,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:13,368 INFO L482 AbstractCegarLoop]: Abstraction has 572 states and 1405 transitions. [2021-06-05 15:00:13,368 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 15:00:13,368 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 1405 transitions. [2021-06-05 15:00:13,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 15:00:13,369 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:13,369 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:13,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable353 [2021-06-05 15:00:13,585 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:13,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:13,585 INFO L82 PathProgramCache]: Analyzing trace with hash 451849338, now seen corresponding path program 37 times [2021-06-05 15:00:13,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:13,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597563976] [2021-06-05 15:00:13,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:13,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:13,663 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:13,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:13,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597563976] [2021-06-05 15:00:13,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597563976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:13,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023686537] [2021-06-05 15:00:13,664 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 15:00:13,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:13,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 15:00:13,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:13,921 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:13,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023686537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:13,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:13,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:00:13,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472384411] [2021-06-05 15:00:13,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:00:13,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:13,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:00:13,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:00:13,923 INFO L87 Difference]: Start difference. First operand 572 states and 1405 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 15:00:14,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:14,233 INFO L93 Difference]: Finished difference Result 658 states and 1604 transitions. [2021-06-05 15:00:14,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:00:14,233 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-06-05 15:00:14,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:14,238 INFO L225 Difference]: With dead ends: 658 [2021-06-05 15:00:14,238 INFO L226 Difference]: Without dead ends: 636 [2021-06-05 15:00:14,239 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 351.1ms TimeCoverageRelationStatistics Valid=183, Invalid=873, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:00:14,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2021-06-05 15:00:14,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 564. [2021-06-05 15:00:14,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 563 states have (on average 2.4600355239786857) internal successors, (1385), 563 states have internal predecessors, (1385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:14,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 1385 transitions. [2021-06-05 15:00:14,245 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 1385 transitions. Word has length 28 [2021-06-05 15:00:14,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:14,245 INFO L482 AbstractCegarLoop]: Abstraction has 564 states and 1385 transitions. [2021-06-05 15:00:14,245 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 15:00:14,245 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 1385 transitions. [2021-06-05 15:00:14,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 15:00:14,246 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:14,246 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:14,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable365 [2021-06-05 15:00:14,465 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:14,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:14,465 INFO L82 PathProgramCache]: Analyzing trace with hash 280163074, now seen corresponding path program 38 times [2021-06-05 15:00:14,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:14,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119976884] [2021-06-05 15:00:14,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:14,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:14,569 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:14,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:14,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119976884] [2021-06-05 15:00:14,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119976884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:14,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008976372] [2021-06-05 15:00:14,569 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 15:00:14,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:00:14,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:14,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 15:00:14,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:14,814 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:14,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008976372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:14,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:14,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:00:14,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471734898] [2021-06-05 15:00:14,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:00:14,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:14,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:00:14,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:00:14,816 INFO L87 Difference]: Start difference. First operand 564 states and 1385 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 15:00:15,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:15,288 INFO L93 Difference]: Finished difference Result 786 states and 1916 transitions. [2021-06-05 15:00:15,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:00:15,288 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-06-05 15:00:15,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:15,290 INFO L225 Difference]: With dead ends: 786 [2021-06-05 15:00:15,290 INFO L226 Difference]: Without dead ends: 748 [2021-06-05 15:00:15,290 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 565.0ms TimeCoverageRelationStatistics Valid=228, Invalid=962, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:00:15,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2021-06-05 15:00:15,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 604. [2021-06-05 15:00:15,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 603 states have (on average 2.462686567164179) internal successors, (1485), 603 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:15,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 1485 transitions. [2021-06-05 15:00:15,297 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 1485 transitions. Word has length 28 [2021-06-05 15:00:15,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:15,297 INFO L482 AbstractCegarLoop]: Abstraction has 604 states and 1485 transitions. [2021-06-05 15:00:15,297 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 15:00:15,297 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 1485 transitions. [2021-06-05 15:00:15,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 15:00:15,300 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:15,300 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:15,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable381,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:15,504 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:15,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:15,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1539301438, now seen corresponding path program 39 times [2021-06-05 15:00:15,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:15,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090840067] [2021-06-05 15:00:15,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:15,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:15,584 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:15,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:15,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090840067] [2021-06-05 15:00:15,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090840067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:15,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082147355] [2021-06-05 15:00:15,584 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) [2021-06-05 15:00:15,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 15:00:15,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:15,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 15:00:15,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:15,823 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:15,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082147355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:15,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:15,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:00:15,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384868803] [2021-06-05 15:00:15,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:00:15,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:15,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:00:15,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:00:15,825 INFO L87 Difference]: Start difference. First operand 604 states and 1485 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 15:00:16,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:16,154 INFO L93 Difference]: Finished difference Result 754 states and 1840 transitions. [2021-06-05 15:00:16,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 15:00:16,154 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-06-05 15:00:16,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:16,156 INFO L225 Difference]: With dead ends: 754 [2021-06-05 15:00:16,156 INFO L226 Difference]: Without dead ends: 724 [2021-06-05 15:00:16,156 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 439.4ms TimeCoverageRelationStatistics Valid=182, Invalid=748, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:00:16,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2021-06-05 15:00:16,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 612. [2021-06-05 15:00:16,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 611 states have (on average 2.463175122749591) internal successors, (1505), 611 states have internal predecessors, (1505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:16,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 1505 transitions. [2021-06-05 15:00:16,162 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 1505 transitions. Word has length 28 [2021-06-05 15:00:16,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:16,163 INFO L482 AbstractCegarLoop]: Abstraction has 612 states and 1505 transitions. [2021-06-05 15:00:16,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 15:00:16,163 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 1505 transitions. [2021-06-05 15:00:16,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 15:00:16,163 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:16,163 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:16,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable392 [2021-06-05 15:00:16,368 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:16,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:16,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1726991738, now seen corresponding path program 40 times [2021-06-05 15:00:16,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:16,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930770695] [2021-06-05 15:00:16,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:16,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:16,444 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:16,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:16,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930770695] [2021-06-05 15:00:16,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930770695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:16,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195352003] [2021-06-05 15:00:16,445 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 15:00:16,476 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:00:16,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:16,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 15:00:16,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:16,677 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:16,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195352003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:16,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:16,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:00:16,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656182273] [2021-06-05 15:00:16,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:00:16,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:16,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:00:16,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:00:16,678 INFO L87 Difference]: Start difference. First operand 612 states and 1505 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 15:00:16,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:16,997 INFO L93 Difference]: Finished difference Result 738 states and 1804 transitions. [2021-06-05 15:00:16,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:00:16,998 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-06-05 15:00:16,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:16,999 INFO L225 Difference]: With dead ends: 738 [2021-06-05 15:00:16,999 INFO L226 Difference]: Without dead ends: 716 [2021-06-05 15:00:16,999 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 378.9ms TimeCoverageRelationStatistics Valid=177, Invalid=879, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:00:17,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2021-06-05 15:00:17,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 588. [2021-06-05 15:00:17,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 587 states have (on average 2.4616695059625213) internal successors, (1445), 587 states have internal predecessors, (1445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:17,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 1445 transitions. [2021-06-05 15:00:17,006 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 1445 transitions. Word has length 28 [2021-06-05 15:00:17,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:17,006 INFO L482 AbstractCegarLoop]: Abstraction has 588 states and 1445 transitions. [2021-06-05 15:00:17,006 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 15:00:17,006 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 1445 transitions. [2021-06-05 15:00:17,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 15:00:17,007 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:17,007 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:17,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable405,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:17,208 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:17,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:17,212 INFO L82 PathProgramCache]: Analyzing trace with hash -1175543362, now seen corresponding path program 41 times [2021-06-05 15:00:17,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:17,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997080755] [2021-06-05 15:00:17,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:17,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:17,336 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:17,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:17,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997080755] [2021-06-05 15:00:17,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997080755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:17,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742474729] [2021-06-05 15:00:17,337 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 15:00:17,360 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 15:00:17,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:17,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 15:00:17,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:17,630 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:17,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742474729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:17,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:17,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:00:17,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700101322] [2021-06-05 15:00:17,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:00:17,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:17,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:00:17,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:00:17,632 INFO L87 Difference]: Start difference. First operand 588 states and 1445 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 15:00:18,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:18,077 INFO L93 Difference]: Finished difference Result 746 states and 1824 transitions. [2021-06-05 15:00:18,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 15:00:18,077 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-06-05 15:00:18,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:18,078 INFO L225 Difference]: With dead ends: 746 [2021-06-05 15:00:18,078 INFO L226 Difference]: Without dead ends: 724 [2021-06-05 15:00:18,078 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 631.7ms TimeCoverageRelationStatistics Valid=193, Invalid=799, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:00:18,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2021-06-05 15:00:18,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 620. [2021-06-05 15:00:18,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 619 states have (on average 2.4636510500807756) internal successors, (1525), 619 states have internal predecessors, (1525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:18,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 1525 transitions. [2021-06-05 15:00:18,084 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 1525 transitions. Word has length 28 [2021-06-05 15:00:18,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:18,084 INFO L482 AbstractCegarLoop]: Abstraction has 620 states and 1525 transitions. [2021-06-05 15:00:18,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 15:00:18,085 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 1525 transitions. [2021-06-05 15:00:18,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 15:00:18,085 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:18,085 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:18,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable421 [2021-06-05 15:00:18,286 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:18,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:18,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1388654202, now seen corresponding path program 42 times [2021-06-05 15:00:18,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:18,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214265960] [2021-06-05 15:00:18,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:18,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:18,370 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:18,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:18,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214265960] [2021-06-05 15:00:18,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214265960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:18,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048118222] [2021-06-05 15:00:18,371 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 15:00:18,398 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 15:00:18,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:18,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 15:00:18,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:18,659 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:18,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048118222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:18,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:18,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:00:18,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263155103] [2021-06-05 15:00:18,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:00:18,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:18,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:00:18,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:00:18,660 INFO L87 Difference]: Start difference. First operand 620 states and 1525 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 15:00:19,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:19,022 INFO L93 Difference]: Finished difference Result 770 states and 1884 transitions. [2021-06-05 15:00:19,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 15:00:19,023 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-06-05 15:00:19,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:19,024 INFO L225 Difference]: With dead ends: 770 [2021-06-05 15:00:19,024 INFO L226 Difference]: Without dead ends: 748 [2021-06-05 15:00:19,024 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 481.2ms TimeCoverageRelationStatistics Valid=153, Invalid=777, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:00:19,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2021-06-05 15:00:19,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 612. [2021-06-05 15:00:19,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 611 states have (on average 2.463175122749591) internal successors, (1505), 611 states have internal predecessors, (1505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:19,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 1505 transitions. [2021-06-05 15:00:19,031 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 1505 transitions. Word has length 28 [2021-06-05 15:00:19,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:19,031 INFO L482 AbstractCegarLoop]: Abstraction has 612 states and 1505 transitions. [2021-06-05 15:00:19,031 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 15:00:19,031 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 1505 transitions. [2021-06-05 15:00:19,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 15:00:19,032 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:19,032 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:19,241 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable436 [2021-06-05 15:00:19,241 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:19,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:19,241 INFO L82 PathProgramCache]: Analyzing trace with hash -238558138, now seen corresponding path program 43 times [2021-06-05 15:00:19,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:19,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416179903] [2021-06-05 15:00:19,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:19,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:19,402 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:19,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:19,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416179903] [2021-06-05 15:00:19,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416179903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:19,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025142558] [2021-06-05 15:00:19,403 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 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 15:00:19,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:19,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 15:00:19,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:19,672 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:19,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025142558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:19,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:19,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:00:19,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662044506] [2021-06-05 15:00:19,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:00:19,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:19,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:00:19,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:00:19,673 INFO L87 Difference]: Start difference. First operand 612 states and 1505 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 15:00:20,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:20,197 INFO L93 Difference]: Finished difference Result 746 states and 1820 transitions. [2021-06-05 15:00:20,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:00:20,197 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-06-05 15:00:20,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:20,198 INFO L225 Difference]: With dead ends: 746 [2021-06-05 15:00:20,198 INFO L226 Difference]: Without dead ends: 716 [2021-06-05 15:00:20,199 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 673.5ms TimeCoverageRelationStatistics Valid=283, Invalid=1049, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:00:20,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2021-06-05 15:00:20,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 660. [2021-06-05 15:00:20,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 659 states have (on average 2.465857359635812) internal successors, (1625), 659 states have internal predecessors, (1625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:20,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 1625 transitions. [2021-06-05 15:00:20,205 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 1625 transitions. Word has length 28 [2021-06-05 15:00:20,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:20,205 INFO L482 AbstractCegarLoop]: Abstraction has 660 states and 1625 transitions. [2021-06-05 15:00:20,205 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 15:00:20,205 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 1625 transitions. [2021-06-05 15:00:20,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 15:00:20,206 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:20,206 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:20,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable450,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:20,421 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:20,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:20,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1409498818, now seen corresponding path program 44 times [2021-06-05 15:00:20,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:20,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367648912] [2021-06-05 15:00:20,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:20,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:20,508 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:20,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:20,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367648912] [2021-06-05 15:00:20,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367648912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:20,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003181407] [2021-06-05 15:00:20,509 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 15:00:20,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:00:20,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:20,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 15:00:20,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:20,761 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:20,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003181407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:20,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:20,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:00:20,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146332879] [2021-06-05 15:00:20,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:00:20,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:20,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:00:20,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:00:20,762 INFO L87 Difference]: Start difference. First operand 660 states and 1625 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 15:00:21,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:21,096 INFO L93 Difference]: Finished difference Result 786 states and 1920 transitions. [2021-06-05 15:00:21,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 15:00:21,097 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-06-05 15:00:21,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:21,098 INFO L225 Difference]: With dead ends: 786 [2021-06-05 15:00:21,098 INFO L226 Difference]: Without dead ends: 756 [2021-06-05 15:00:21,098 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 437.8ms TimeCoverageRelationStatistics Valid=190, Invalid=740, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:00:21,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2021-06-05 15:00:21,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 660. [2021-06-05 15:00:21,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 659 states have (on average 2.465857359635812) internal successors, (1625), 659 states have internal predecessors, (1625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:21,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 1625 transitions. [2021-06-05 15:00:21,105 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 1625 transitions. Word has length 28 [2021-06-05 15:00:21,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:21,105 INFO L482 AbstractCegarLoop]: Abstraction has 660 states and 1625 transitions. [2021-06-05 15:00:21,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 15:00:21,105 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 1625 transitions. [2021-06-05 15:00:21,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 15:00:21,105 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:21,106 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:21,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable463 [2021-06-05 15:00:21,306 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:21,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:21,306 INFO L82 PathProgramCache]: Analyzing trace with hash 170623678, now seen corresponding path program 45 times [2021-06-05 15:00:21,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:21,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179189840] [2021-06-05 15:00:21,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:21,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:21,406 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:21,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:21,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179189840] [2021-06-05 15:00:21,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179189840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:21,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744482044] [2021-06-05 15:00:21,406 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 15:00:21,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 15:00:21,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:21,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 15:00:21,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:21,698 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:21,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744482044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:21,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:21,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:00:21,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371727765] [2021-06-05 15:00:21,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:00:21,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:21,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:00:21,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:00:21,699 INFO L87 Difference]: Start difference. First operand 660 states and 1625 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 15:00:22,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:22,129 INFO L93 Difference]: Finished difference Result 810 states and 1984 transitions. [2021-06-05 15:00:22,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 15:00:22,129 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-06-05 15:00:22,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:22,131 INFO L225 Difference]: With dead ends: 810 [2021-06-05 15:00:22,131 INFO L226 Difference]: Without dead ends: 788 [2021-06-05 15:00:22,131 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 565.2ms TimeCoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:00:22,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2021-06-05 15:00:22,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 668. [2021-06-05 15:00:22,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 667 states have (on average 2.4662668665667167) internal successors, (1645), 667 states have internal predecessors, (1645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:22,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 1645 transitions. [2021-06-05 15:00:22,138 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 1645 transitions. Word has length 28 [2021-06-05 15:00:22,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:22,138 INFO L482 AbstractCegarLoop]: Abstraction has 668 states and 1645 transitions. [2021-06-05 15:00:22,138 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 15:00:22,138 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 1645 transitions. [2021-06-05 15:00:22,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 15:00:22,139 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:22,139 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:22,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable478,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:22,343 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:22,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:22,343 INFO L82 PathProgramCache]: Analyzing trace with hash -1578394186, now seen corresponding path program 46 times [2021-06-05 15:00:22,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:22,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272952582] [2021-06-05 15:00:22,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:22,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:22,553 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:22,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:22,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272952582] [2021-06-05 15:00:22,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272952582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:22,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319429567] [2021-06-05 15:00:22,554 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 15:00:22,577 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:00:22,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:22,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 15:00:22,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:22,833 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:22,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319429567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:22,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:22,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:00:22,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717543051] [2021-06-05 15:00:22,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:00:22,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:22,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:00:22,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:00:22,834 INFO L87 Difference]: Start difference. First operand 668 states and 1645 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 15:00:23,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:23,236 INFO L93 Difference]: Finished difference Result 794 states and 1936 transitions. [2021-06-05 15:00:23,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 15:00:23,237 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-06-05 15:00:23,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:23,238 INFO L225 Difference]: With dead ends: 794 [2021-06-05 15:00:23,238 INFO L226 Difference]: Without dead ends: 756 [2021-06-05 15:00:23,238 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 624.3ms TimeCoverageRelationStatistics Valid=192, Invalid=800, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:00:23,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2021-06-05 15:00:23,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 684. [2021-06-05 15:00:23,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 683 states have (on average 2.4670571010248903) internal successors, (1685), 683 states have internal predecessors, (1685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:23,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 1685 transitions. [2021-06-05 15:00:23,245 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 1685 transitions. Word has length 28 [2021-06-05 15:00:23,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:23,245 INFO L482 AbstractCegarLoop]: Abstraction has 684 states and 1685 transitions. [2021-06-05 15:00:23,245 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 15:00:23,245 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 1685 transitions. [2021-06-05 15:00:23,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 15:00:23,246 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:23,246 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:23,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable493,54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:23,465 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:23,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:23,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1445766078, now seen corresponding path program 47 times [2021-06-05 15:00:23,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:23,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873083244] [2021-06-05 15:00:23,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:23,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:23,555 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:23,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:23,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873083244] [2021-06-05 15:00:23,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873083244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:23,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839924853] [2021-06-05 15:00:23,555 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 15:00:23,600 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 15:00:23,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:23,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 15:00:23,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:23,891 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:23,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839924853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:23,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:23,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:00:23,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846191676] [2021-06-05 15:00:23,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:00:23,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:23,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:00:23,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:00:23,892 INFO L87 Difference]: Start difference. First operand 684 states and 1685 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 15:00:24,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:24,311 INFO L93 Difference]: Finished difference Result 802 states and 1964 transitions. [2021-06-05 15:00:24,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 15:00:24,311 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-06-05 15:00:24,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:24,312 INFO L225 Difference]: With dead ends: 802 [2021-06-05 15:00:24,312 INFO L226 Difference]: Without dead ends: 780 [2021-06-05 15:00:24,313 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 605.7ms TimeCoverageRelationStatistics Valid=193, Invalid=737, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:00:24,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2021-06-05 15:00:24,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 692. [2021-06-05 15:00:24,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 692 states, 691 states have (on average 2.467438494934877) internal successors, (1705), 691 states have internal predecessors, (1705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:24,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 1705 transitions. [2021-06-05 15:00:24,320 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 1705 transitions. Word has length 28 [2021-06-05 15:00:24,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:24,320 INFO L482 AbstractCegarLoop]: Abstraction has 692 states and 1705 transitions. [2021-06-05 15:00:24,320 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 15:00:24,320 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 1705 transitions. [2021-06-05 15:00:24,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 15:00:24,321 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:24,321 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:24,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable503 [2021-06-05 15:00:24,534 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:24,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:24,534 INFO L82 PathProgramCache]: Analyzing trace with hash -285003654, now seen corresponding path program 48 times [2021-06-05 15:00:24,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:24,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685016281] [2021-06-05 15:00:24,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:24,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:24,607 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:24,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:24,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685016281] [2021-06-05 15:00:24,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685016281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:24,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067339863] [2021-06-05 15:00:24,607 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 15:00:24,678 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 15:00:24,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:24,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 15:00:24,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:24,942 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:24,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067339863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:24,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:24,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:00:24,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763855904] [2021-06-05 15:00:24,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:00:24,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:24,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:00:24,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:00:24,943 INFO L87 Difference]: Start difference. First operand 692 states and 1705 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 15:00:25,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:25,320 INFO L93 Difference]: Finished difference Result 834 states and 2044 transitions. [2021-06-05 15:00:25,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 15:00:25,320 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-06-05 15:00:25,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:25,321 INFO L225 Difference]: With dead ends: 834 [2021-06-05 15:00:25,321 INFO L226 Difference]: Without dead ends: 812 [2021-06-05 15:00:25,321 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 502.7ms TimeCoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:00:25,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2021-06-05 15:00:25,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 684. [2021-06-05 15:00:25,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 683 states have (on average 2.4670571010248903) internal successors, (1685), 683 states have internal predecessors, (1685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:25,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 1685 transitions. [2021-06-05 15:00:25,330 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 1685 transitions. Word has length 28 [2021-06-05 15:00:25,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:25,330 INFO L482 AbstractCegarLoop]: Abstraction has 684 states and 1685 transitions. [2021-06-05 15:00:25,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 15:00:25,330 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 1685 transitions. [2021-06-05 15:00:25,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 15:00:25,331 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:25,331 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:25,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable517,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:25,532 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:25,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:25,532 INFO L82 PathProgramCache]: Analyzing trace with hash -303251786, now seen corresponding path program 49 times [2021-06-05 15:00:25,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:25,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719416466] [2021-06-05 15:00:25,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:25,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:25,650 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:25,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:25,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719416466] [2021-06-05 15:00:25,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719416466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:25,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071026995] [2021-06-05 15:00:25,650 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 15:00:25,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:25,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 15:00:25,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:25,945 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:25,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071026995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:25,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:25,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:00:25,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246535066] [2021-06-05 15:00:25,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:00:25,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:25,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:00:25,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:00:25,946 INFO L87 Difference]: Start difference. First operand 684 states and 1685 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 15:00:26,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:26,336 INFO L93 Difference]: Finished difference Result 826 states and 2016 transitions. [2021-06-05 15:00:26,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 15:00:26,337 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-06-05 15:00:26,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:26,338 INFO L225 Difference]: With dead ends: 826 [2021-06-05 15:00:26,338 INFO L226 Difference]: Without dead ends: 788 [2021-06-05 15:00:26,338 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 564.1ms TimeCoverageRelationStatistics Valid=181, Invalid=811, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:00:26,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2021-06-05 15:00:26,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 684. [2021-06-05 15:00:26,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 683 states have (on average 2.4670571010248903) internal successors, (1685), 683 states have internal predecessors, (1685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:26,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 1685 transitions. [2021-06-05 15:00:26,345 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 1685 transitions. Word has length 28 [2021-06-05 15:00:26,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:26,345 INFO L482 AbstractCegarLoop]: Abstraction has 684 states and 1685 transitions. [2021-06-05 15:00:26,345 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 15:00:26,345 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 1685 transitions. [2021-06-05 15:00:26,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 15:00:26,346 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:26,346 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:26,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable531 [2021-06-05 15:00:26,549 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:26,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:26,549 INFO L82 PathProgramCache]: Analyzing trace with hash -829279622, now seen corresponding path program 50 times [2021-06-05 15:00:26,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:26,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455931803] [2021-06-05 15:00:26,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:26,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:26,610 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:26,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:26,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455931803] [2021-06-05 15:00:26,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455931803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:26,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173569652] [2021-06-05 15:00:26,610 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 15:00:26,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:00:26,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:26,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 15:00:26,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:26,814 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:26,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173569652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:26,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:26,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:00:26,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343030367] [2021-06-05 15:00:26,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:00:26,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:26,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:00:26,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:00:26,815 INFO L87 Difference]: Start difference. First operand 684 states and 1685 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 15:00:27,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:27,062 INFO L93 Difference]: Finished difference Result 794 states and 1936 transitions. [2021-06-05 15:00:27,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 15:00:27,062 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-06-05 15:00:27,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:27,063 INFO L225 Difference]: With dead ends: 794 [2021-06-05 15:00:27,064 INFO L226 Difference]: Without dead ends: 756 [2021-06-05 15:00:27,064 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 292.9ms TimeCoverageRelationStatistics Valid=154, Invalid=716, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:00:27,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2021-06-05 15:00:27,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 692. [2021-06-05 15:00:27,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 692 states, 691 states have (on average 2.467438494934877) internal successors, (1705), 691 states have internal predecessors, (1705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:27,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 1705 transitions. [2021-06-05 15:00:27,071 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 1705 transitions. Word has length 28 [2021-06-05 15:00:27,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:27,071 INFO L482 AbstractCegarLoop]: Abstraction has 692 states and 1705 transitions. [2021-06-05 15:00:27,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 15:00:27,072 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 1705 transitions. [2021-06-05 15:00:27,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 15:00:27,073 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:27,073 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:27,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable546,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:27,289 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:27,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:27,289 INFO L82 PathProgramCache]: Analyzing trace with hash -641589322, now seen corresponding path program 51 times [2021-06-05 15:00:27,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:27,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052274377] [2021-06-05 15:00:27,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:27,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:27,357 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:27,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:27,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052274377] [2021-06-05 15:00:27,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052274377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:27,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265359347] [2021-06-05 15:00:27,357 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 15:00:27,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 15:00:27,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:27,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 15:00:27,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:27,618 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:27,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265359347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:27,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:27,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:00:27,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444749699] [2021-06-05 15:00:27,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:00:27,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:27,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:00:27,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:00:27,619 INFO L87 Difference]: Start difference. First operand 692 states and 1705 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 15:00:28,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:28,117 INFO L93 Difference]: Finished difference Result 842 states and 2052 transitions. [2021-06-05 15:00:28,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:00:28,117 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-06-05 15:00:28,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:28,118 INFO L225 Difference]: With dead ends: 842 [2021-06-05 15:00:28,118 INFO L226 Difference]: Without dead ends: 796 [2021-06-05 15:00:28,119 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 501.0ms TimeCoverageRelationStatistics Valid=204, Invalid=918, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:00:28,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 796 states. [2021-06-05 15:00:28,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 796 to 708. [2021-06-05 15:00:28,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 708 states, 707 states have (on average 2.468175388967468) internal successors, (1745), 707 states have internal predecessors, (1745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:28,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 708 states to 708 states and 1745 transitions. [2021-06-05 15:00:28,125 INFO L78 Accepts]: Start accepts. Automaton has 708 states and 1745 transitions. Word has length 28 [2021-06-05 15:00:28,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:28,126 INFO L482 AbstractCegarLoop]: Abstraction has 708 states and 1745 transitions. [2021-06-05 15:00:28,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 15:00:28,126 INFO L276 IsEmpty]: Start isEmpty. Operand 708 states and 1745 transitions. [2021-06-05 15:00:28,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 15:00:28,126 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:28,126 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:28,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable558 [2021-06-05 15:00:28,327 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:28,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:28,327 INFO L82 PathProgramCache]: Analyzing trace with hash -322191042, now seen corresponding path program 52 times [2021-06-05 15:00:28,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:28,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463359286] [2021-06-05 15:00:28,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:28,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:28,417 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:28,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:28,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463359286] [2021-06-05 15:00:28,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463359286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:28,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087639956] [2021-06-05 15:00:28,417 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 15:00:28,439 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:00:28,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:28,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 15:00:28,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:28,677 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:28,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087639956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:28,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:28,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:00:28,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119334073] [2021-06-05 15:00:28,678 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:00:28,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:28,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:00:28,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:00:28,678 INFO L87 Difference]: Start difference. First operand 708 states and 1745 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 15:00:29,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:29,049 INFO L93 Difference]: Finished difference Result 818 states and 2004 transitions. [2021-06-05 15:00:29,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 15:00:29,050 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-06-05 15:00:29,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:29,051 INFO L225 Difference]: With dead ends: 818 [2021-06-05 15:00:29,051 INFO L226 Difference]: Without dead ends: 796 [2021-06-05 15:00:29,051 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 515.0ms TimeCoverageRelationStatistics Valid=208, Invalid=784, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:00:29,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 796 states. [2021-06-05 15:00:29,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 796 to 716. [2021-06-05 15:00:29,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 2.4685314685314683) internal successors, (1765), 715 states have internal predecessors, (1765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:29,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1765 transitions. [2021-06-05 15:00:29,058 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1765 transitions. Word has length 28 [2021-06-05 15:00:29,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:29,059 INFO L482 AbstractCegarLoop]: Abstraction has 716 states and 1765 transitions. [2021-06-05 15:00:29,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 15:00:29,059 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1765 transitions. [2021-06-05 15:00:29,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 15:00:29,059 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:29,059 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:29,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable570,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:29,277 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:29,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:29,277 INFO L82 PathProgramCache]: Analyzing trace with hash -528129474, now seen corresponding path program 53 times [2021-06-05 15:00:29,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:29,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026041564] [2021-06-05 15:00:29,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:29,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:29,359 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:29,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:29,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026041564] [2021-06-05 15:00:29,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026041564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:29,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231873298] [2021-06-05 15:00:29,359 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 15:00:29,397 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 15:00:29,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:29,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 15:00:29,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:29,600 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:29,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231873298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:29,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:29,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:00:29,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911976382] [2021-06-05 15:00:29,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:00:29,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:29,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:00:29,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:00:29,601 INFO L87 Difference]: Start difference. First operand 716 states and 1765 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 15:00:29,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:29,973 INFO L93 Difference]: Finished difference Result 850 states and 2080 transitions. [2021-06-05 15:00:29,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 15:00:29,973 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-06-05 15:00:29,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:29,974 INFO L225 Difference]: With dead ends: 850 [2021-06-05 15:00:29,974 INFO L226 Difference]: Without dead ends: 820 [2021-06-05 15:00:29,975 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 424.5ms TimeCoverageRelationStatistics Valid=201, Invalid=729, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:00:29,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2021-06-05 15:00:29,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 716. [2021-06-05 15:00:29,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 2.4685314685314683) internal successors, (1765), 715 states have internal predecessors, (1765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:29,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1765 transitions. [2021-06-05 15:00:29,986 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1765 transitions. Word has length 28 [2021-06-05 15:00:29,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:29,986 INFO L482 AbstractCegarLoop]: Abstraction has 716 states and 1765 transitions. [2021-06-05 15:00:29,986 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 15:00:29,986 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1765 transitions. [2021-06-05 15:00:29,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 15:00:29,987 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:29,987 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:30,202 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable582,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:30,202 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:30,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:30,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1051993022, now seen corresponding path program 54 times [2021-06-05 15:00:30,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:30,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879828164] [2021-06-05 15:00:30,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:30,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:30,301 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:30,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:30,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879828164] [2021-06-05 15:00:30,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879828164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:30,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072206766] [2021-06-05 15:00:30,301 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 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 15:00:30,324 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 15:00:30,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:30,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 15:00:30,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:30,606 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:30,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072206766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:30,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:30,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:00:30,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762369362] [2021-06-05 15:00:30,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:00:30,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:30,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:00:30,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:00:30,608 INFO L87 Difference]: Start difference. First operand 716 states and 1765 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 15:00:31,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:31,002 INFO L93 Difference]: Finished difference Result 866 states and 2120 transitions. [2021-06-05 15:00:31,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 15:00:31,003 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-06-05 15:00:31,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:31,004 INFO L225 Difference]: With dead ends: 866 [2021-06-05 15:00:31,004 INFO L226 Difference]: Without dead ends: 836 [2021-06-05 15:00:31,004 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 581.5ms TimeCoverageRelationStatistics Valid=183, Invalid=809, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:00:31,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2021-06-05 15:00:31,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 732. [2021-06-05 15:00:31,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 732 states, 731 states have (on average 2.46922024623803) internal successors, (1805), 731 states have internal predecessors, (1805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:31,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 1805 transitions. [2021-06-05 15:00:31,011 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 1805 transitions. Word has length 28 [2021-06-05 15:00:31,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:31,011 INFO L482 AbstractCegarLoop]: Abstraction has 732 states and 1805 transitions. [2021-06-05 15:00:31,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 15:00:31,011 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 1805 transitions. [2021-06-05 15:00:31,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 15:00:31,012 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:31,012 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:31,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable594,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:31,212 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:31,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:31,213 INFO L82 PathProgramCache]: Analyzing trace with hash -678776710, now seen corresponding path program 55 times [2021-06-05 15:00:31,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:31,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48151730] [2021-06-05 15:00:31,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:31,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:31,298 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:31,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:31,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48151730] [2021-06-05 15:00:31,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48151730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:31,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705050428] [2021-06-05 15:00:31,298 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 15:00:31,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:31,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 15:00:31,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:31,583 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:31,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705050428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:31,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:31,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:00:31,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657269703] [2021-06-05 15:00:31,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:00:31,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:31,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:00:31,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:00:31,585 INFO L87 Difference]: Start difference. First operand 732 states and 1805 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 15:00:31,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:31,929 INFO L93 Difference]: Finished difference Result 890 states and 2184 transitions. [2021-06-05 15:00:31,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 15:00:31,929 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-06-05 15:00:31,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:31,930 INFO L225 Difference]: With dead ends: 890 [2021-06-05 15:00:31,931 INFO L226 Difference]: Without dead ends: 868 [2021-06-05 15:00:31,931 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 450.6ms TimeCoverageRelationStatistics Valid=153, Invalid=777, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:00:31,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2021-06-05 15:00:31,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 732. [2021-06-05 15:00:31,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 732 states, 731 states have (on average 2.46922024623803) internal successors, (1805), 731 states have internal predecessors, (1805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:31,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 1805 transitions. [2021-06-05 15:00:31,938 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 1805 transitions. Word has length 28 [2021-06-05 15:00:31,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:31,938 INFO L482 AbstractCegarLoop]: Abstraction has 732 states and 1805 transitions. [2021-06-05 15:00:31,938 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 15:00:31,938 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 1805 transitions. [2021-06-05 15:00:31,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 15:00:31,939 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:31,939 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:32,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable609,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:32,153 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:32,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:32,153 INFO L82 PathProgramCache]: Analyzing trace with hash -884715142, now seen corresponding path program 56 times [2021-06-05 15:00:32,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:32,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304987901] [2021-06-05 15:00:32,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:32,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:32,235 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:32,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:32,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304987901] [2021-06-05 15:00:32,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304987901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:32,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884860909] [2021-06-05 15:00:32,235 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 15:00:32,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:00:32,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:32,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 15:00:32,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:32,461 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:32,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884860909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:32,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:32,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:00:32,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182061376] [2021-06-05 15:00:32,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:00:32,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:32,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:00:32,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:00:32,461 INFO L87 Difference]: Start difference. First operand 732 states and 1805 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 15:00:32,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:32,775 INFO L93 Difference]: Finished difference Result 882 states and 2156 transitions. [2021-06-05 15:00:32,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 15:00:32,775 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-06-05 15:00:32,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:32,776 INFO L225 Difference]: With dead ends: 882 [2021-06-05 15:00:32,776 INFO L226 Difference]: Without dead ends: 844 [2021-06-05 15:00:32,776 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 403.6ms TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:00:32,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2021-06-05 15:00:32,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 748. [2021-06-05 15:00:32,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 747 states have (on average 2.4698795180722892) internal successors, (1845), 747 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:32,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 1845 transitions. [2021-06-05 15:00:32,784 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 1845 transitions. Word has length 28 [2021-06-05 15:00:32,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:32,784 INFO L482 AbstractCegarLoop]: Abstraction has 748 states and 1845 transitions. [2021-06-05 15:00:32,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 15:00:32,784 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 1845 transitions. [2021-06-05 15:00:32,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 15:00:32,785 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:32,785 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:33,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable626,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:33,001 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:33,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:33,001 INFO L82 PathProgramCache]: Analyzing trace with hash -697024842, now seen corresponding path program 57 times [2021-06-05 15:00:33,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:33,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597271029] [2021-06-05 15:00:33,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:33,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:33,121 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:33,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:33,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597271029] [2021-06-05 15:00:33,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597271029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:33,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776019418] [2021-06-05 15:00:33,122 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 15:00:33,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 15:00:33,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:33,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 15:00:33,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:33,411 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:33,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776019418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:33,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:33,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:00:33,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84671883] [2021-06-05 15:00:33,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:00:33,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:33,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:00:33,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:00:33,412 INFO L87 Difference]: Start difference. First operand 748 states and 1845 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 15:00:33,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:33,818 INFO L93 Difference]: Finished difference Result 898 states and 2192 transitions. [2021-06-05 15:00:33,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 15:00:33,818 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-06-05 15:00:33,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:33,819 INFO L225 Difference]: With dead ends: 898 [2021-06-05 15:00:33,819 INFO L226 Difference]: Without dead ends: 852 [2021-06-05 15:00:33,819 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 557.4ms TimeCoverageRelationStatistics Valid=191, Invalid=739, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:00:33,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 852 states. [2021-06-05 15:00:33,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 852 to 748. [2021-06-05 15:00:33,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 747 states have (on average 2.4698795180722892) internal successors, (1845), 747 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:33,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 1845 transitions. [2021-06-05 15:00:33,826 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 1845 transitions. Word has length 28 [2021-06-05 15:00:33,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:33,826 INFO L482 AbstractCegarLoop]: Abstraction has 748 states and 1845 transitions. [2021-06-05 15:00:33,826 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 15:00:33,826 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 1845 transitions. [2021-06-05 15:00:33,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 15:00:33,827 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:33,827 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:34,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable642 [2021-06-05 15:00:34,028 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:34,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:34,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1967831874, now seen corresponding path program 58 times [2021-06-05 15:00:34,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:34,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638029610] [2021-06-05 15:00:34,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:34,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:34,117 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:34,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:34,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638029610] [2021-06-05 15:00:34,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638029610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:34,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860634611] [2021-06-05 15:00:34,118 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 15:00:34,139 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:00:34,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:34,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 15:00:34,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:34,411 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:34,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860634611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:34,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:34,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:00:34,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745275374] [2021-06-05 15:00:34,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:00:34,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:34,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:00:34,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:00:34,412 INFO L87 Difference]: Start difference. First operand 748 states and 1845 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 15:00:34,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:34,809 INFO L93 Difference]: Finished difference Result 874 states and 2144 transitions. [2021-06-05 15:00:34,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 15:00:34,809 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-06-05 15:00:34,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:34,810 INFO L225 Difference]: With dead ends: 874 [2021-06-05 15:00:34,810 INFO L226 Difference]: Without dead ends: 852 [2021-06-05 15:00:34,811 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 557.7ms TimeCoverageRelationStatistics Valid=194, Invalid=798, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:00:34,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 852 states. [2021-06-05 15:00:34,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 852 to 740. [2021-06-05 15:00:34,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 2.469553450608931) internal successors, (1825), 739 states have internal predecessors, (1825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:34,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1825 transitions. [2021-06-05 15:00:34,817 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1825 transitions. Word has length 28 [2021-06-05 15:00:34,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:34,817 INFO L482 AbstractCegarLoop]: Abstraction has 740 states and 1825 transitions. [2021-06-05 15:00:34,818 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 15:00:34,818 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1825 transitions. [2021-06-05 15:00:34,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 15:00:34,818 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:34,818 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:35,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable662 [2021-06-05 15:00:35,031 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:35,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:35,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1175607874, now seen corresponding path program 59 times [2021-06-05 15:00:35,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:35,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618735196] [2021-06-05 15:00:35,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:35,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:35,137 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:35,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:35,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618735196] [2021-06-05 15:00:35,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618735196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:35,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89877958] [2021-06-05 15:00:35,137 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 15:00:35,159 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 15:00:35,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:35,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 15:00:35,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:35,365 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:35,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89877958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:35,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:35,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:00:35,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388979934] [2021-06-05 15:00:35,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:00:35,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:35,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:00:35,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:00:35,366 INFO L87 Difference]: Start difference. First operand 740 states and 1825 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 15:00:35,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:35,794 INFO L93 Difference]: Finished difference Result 858 states and 2100 transitions. [2021-06-05 15:00:35,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:00:35,795 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-06-05 15:00:35,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:35,795 INFO L225 Difference]: With dead ends: 858 [2021-06-05 15:00:35,795 INFO L226 Difference]: Without dead ends: 828 [2021-06-05 15:00:35,796 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 544.9ms TimeCoverageRelationStatistics Valid=212, Invalid=844, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:00:35,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2021-06-05 15:00:35,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 716. [2021-06-05 15:00:35,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 2.462937062937063) internal successors, (1761), 715 states have internal predecessors, (1761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:35,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1761 transitions. [2021-06-05 15:00:35,802 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1761 transitions. Word has length 28 [2021-06-05 15:00:35,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:35,802 INFO L482 AbstractCegarLoop]: Abstraction has 716 states and 1761 transitions. [2021-06-05 15:00:35,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 15:00:35,802 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1761 transitions. [2021-06-05 15:00:35,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 15:00:35,803 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:35,803 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:36,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable679 [2021-06-05 15:00:36,004 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:36,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:36,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1970549754, now seen corresponding path program 60 times [2021-06-05 15:00:36,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:36,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677459886] [2021-06-05 15:00:36,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:36,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:36,106 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:36,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:36,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677459886] [2021-06-05 15:00:36,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677459886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:36,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809267229] [2021-06-05 15:00:36,106 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 15:00:36,129 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 15:00:36,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:36,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 15:00:36,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:36,322 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:36,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809267229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:36,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:36,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:00:36,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487531217] [2021-06-05 15:00:36,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:00:36,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:36,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:00:36,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:00:36,323 INFO L87 Difference]: Start difference. First operand 716 states and 1761 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 15:00:36,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:36,743 INFO L93 Difference]: Finished difference Result 918 states and 2183 transitions. [2021-06-05 15:00:36,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:00:36,755 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-06-05 15:00:36,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:36,757 INFO L225 Difference]: With dead ends: 918 [2021-06-05 15:00:36,757 INFO L226 Difference]: Without dead ends: 888 [2021-06-05 15:00:36,757 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 446.1ms TimeCoverageRelationStatistics Valid=176, Invalid=880, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:00:36,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 888 states. [2021-06-05 15:00:36,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 888 to 716. [2021-06-05 15:00:36,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 2.462937062937063) internal successors, (1761), 715 states have internal predecessors, (1761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:36,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1761 transitions. [2021-06-05 15:00:36,766 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1761 transitions. Word has length 28 [2021-06-05 15:00:36,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:36,767 INFO L482 AbstractCegarLoop]: Abstraction has 716 states and 1761 transitions. [2021-06-05 15:00:36,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 15:00:36,767 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1761 transitions. [2021-06-05 15:00:36,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 15:00:36,768 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:36,768 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:36,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable691,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:36,969 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:36,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:36,969 INFO L82 PathProgramCache]: Analyzing trace with hash 221531890, now seen corresponding path program 61 times [2021-06-05 15:00:36,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:36,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755853998] [2021-06-05 15:00:36,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:36,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:37,052 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:37,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:37,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755853998] [2021-06-05 15:00:37,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755853998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:37,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028404509] [2021-06-05 15:00:37,053 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 15:00:37,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:37,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 15:00:37,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:37,259 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:37,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028404509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:37,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:37,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:00:37,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502432179] [2021-06-05 15:00:37,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:00:37,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:37,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:00:37,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:00:37,260 INFO L87 Difference]: Start difference. First operand 716 states and 1761 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 15:00:37,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:37,626 INFO L93 Difference]: Finished difference Result 770 states and 1876 transitions. [2021-06-05 15:00:37,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:00:37,626 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-06-05 15:00:37,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:37,627 INFO L225 Difference]: With dead ends: 770 [2021-06-05 15:00:37,627 INFO L226 Difference]: Without dead ends: 748 [2021-06-05 15:00:37,627 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 364.3ms TimeCoverageRelationStatistics Valid=191, Invalid=865, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:00:37,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2021-06-05 15:00:37,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 716. [2021-06-05 15:00:37,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 2.4573426573426573) internal successors, (1757), 715 states have internal predecessors, (1757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:37,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1757 transitions. [2021-06-05 15:00:37,634 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1757 transitions. Word has length 28 [2021-06-05 15:00:37,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:37,634 INFO L482 AbstractCegarLoop]: Abstraction has 716 states and 1757 transitions. [2021-06-05 15:00:37,634 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 15:00:37,634 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1757 transitions. [2021-06-05 15:00:37,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 15:00:37,634 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:37,635 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:37,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable706,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:37,835 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:37,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:37,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1754842430, now seen corresponding path program 62 times [2021-06-05 15:00:37,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:37,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037385931] [2021-06-05 15:00:37,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:37,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:37,920 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:37,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:37,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037385931] [2021-06-05 15:00:37,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037385931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:37,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291667073] [2021-06-05 15:00:37,920 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 15:00:37,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:00:37,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:37,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 15:00:37,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:38,178 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:38,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291667073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:38,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:38,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:00:38,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398631214] [2021-06-05 15:00:38,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:00:38,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:38,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:00:38,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:00:38,179 INFO L87 Difference]: Start difference. First operand 716 states and 1757 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 15:00:38,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:38,780 INFO L93 Difference]: Finished difference Result 874 states and 2132 transitions. [2021-06-05 15:00:38,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:00:38,780 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-06-05 15:00:38,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:38,781 INFO L225 Difference]: With dead ends: 874 [2021-06-05 15:00:38,781 INFO L226 Difference]: Without dead ends: 844 [2021-06-05 15:00:38,781 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 704.3ms TimeCoverageRelationStatistics Valid=283, Invalid=1049, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:00:38,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2021-06-05 15:00:38,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 724. [2021-06-05 15:00:38,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 724 states, 723 states have (on average 2.4578146611341634) internal successors, (1777), 723 states have internal predecessors, (1777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:38,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 1777 transitions. [2021-06-05 15:00:38,788 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 1777 transitions. Word has length 28 [2021-06-05 15:00:38,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:38,788 INFO L482 AbstractCegarLoop]: Abstraction has 724 states and 1777 transitions. [2021-06-05 15:00:38,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 15:00:38,788 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 1777 transitions. [2021-06-05 15:00:38,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 15:00:38,789 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:38,789 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:38,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable718,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:38,990 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:38,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:38,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1924284598, now seen corresponding path program 63 times [2021-06-05 15:00:38,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:38,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325184758] [2021-06-05 15:00:38,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:38,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:39,073 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:39,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:39,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325184758] [2021-06-05 15:00:39,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325184758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:39,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240126803] [2021-06-05 15:00:39,074 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 15:00:39,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 15:00:39,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:39,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 15:00:39,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:39,361 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:39,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240126803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:39,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:39,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:00:39,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868468032] [2021-06-05 15:00:39,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:00:39,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:39,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:00:39,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:00:39,362 INFO L87 Difference]: Start difference. First operand 724 states and 1777 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 15:00:39,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:39,776 INFO L93 Difference]: Finished difference Result 914 states and 2224 transitions. [2021-06-05 15:00:39,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 15:00:39,776 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-06-05 15:00:39,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:39,777 INFO L225 Difference]: With dead ends: 914 [2021-06-05 15:00:39,777 INFO L226 Difference]: Without dead ends: 868 [2021-06-05 15:00:39,777 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 569.3ms TimeCoverageRelationStatistics Valid=193, Invalid=799, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:00:39,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2021-06-05 15:00:39,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 716. [2021-06-05 15:00:39,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 2.4573426573426573) internal successors, (1757), 715 states have internal predecessors, (1757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:39,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1757 transitions. [2021-06-05 15:00:39,784 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1757 transitions. Word has length 28 [2021-06-05 15:00:39,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:39,784 INFO L482 AbstractCegarLoop]: Abstraction has 716 states and 1757 transitions. [2021-06-05 15:00:39,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 15:00:39,784 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1757 transitions. [2021-06-05 15:00:39,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 15:00:39,785 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:39,785 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:39,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable728,71 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:39,985 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:39,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:39,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1398256762, now seen corresponding path program 64 times [2021-06-05 15:00:39,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:39,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004329524] [2021-06-05 15:00:39,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:39,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:40,055 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:40,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:40,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004329524] [2021-06-05 15:00:40,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004329524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:40,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609541375] [2021-06-05 15:00:40,055 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 15:00:40,077 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:00:40,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:40,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 15:00:40,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:40,296 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:40,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609541375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:40,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:40,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:00:40,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478179413] [2021-06-05 15:00:40,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:00:40,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:40,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:00:40,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:00:40,297 INFO L87 Difference]: Start difference. First operand 716 states and 1757 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 15:00:40,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:40,565 INFO L93 Difference]: Finished difference Result 866 states and 2108 transitions. [2021-06-05 15:00:40,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 15:00:40,566 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-06-05 15:00:40,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:40,566 INFO L225 Difference]: With dead ends: 866 [2021-06-05 15:00:40,567 INFO L226 Difference]: Without dead ends: 828 [2021-06-05 15:00:40,567 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 341.9ms TimeCoverageRelationStatistics Valid=146, Invalid=724, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:00:40,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2021-06-05 15:00:40,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 732. [2021-06-05 15:00:40,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 732 states, 731 states have (on average 2.4582763337893296) internal successors, (1797), 731 states have internal predecessors, (1797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:40,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 1797 transitions. [2021-06-05 15:00:40,573 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 1797 transitions. Word has length 28 [2021-06-05 15:00:40,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:40,574 INFO L482 AbstractCegarLoop]: Abstraction has 732 states and 1797 transitions. [2021-06-05 15:00:40,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 15:00:40,574 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 1797 transitions. [2021-06-05 15:00:40,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 15:00:40,574 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:40,574 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:40,775 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable743 [2021-06-05 15:00:40,775 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:40,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:40,775 INFO L82 PathProgramCache]: Analyzing trace with hash 1585947062, now seen corresponding path program 65 times [2021-06-05 15:00:40,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:40,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895074487] [2021-06-05 15:00:40,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:40,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:40,868 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:40,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:40,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895074487] [2021-06-05 15:00:40,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895074487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:40,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748587982] [2021-06-05 15:00:40,869 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 15:00:40,893 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 15:00:40,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:40,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 15:00:40,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:41,142 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:41,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748587982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:41,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:41,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:00:41,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78469533] [2021-06-05 15:00:41,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:00:41,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:41,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:00:41,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:00:41,143 INFO L87 Difference]: Start difference. First operand 732 states and 1797 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 15:00:41,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:41,581 INFO L93 Difference]: Finished difference Result 930 states and 2264 transitions. [2021-06-05 15:00:41,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:00:41,581 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-06-05 15:00:41,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:41,582 INFO L225 Difference]: With dead ends: 930 [2021-06-05 15:00:41,582 INFO L226 Difference]: Without dead ends: 884 [2021-06-05 15:00:41,582 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 569.0ms TimeCoverageRelationStatistics Valid=209, Invalid=913, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:00:41,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2021-06-05 15:00:41,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 740. [2021-06-05 15:00:41,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 2.45872801082544) internal successors, (1817), 739 states have internal predecessors, (1817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:41,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1817 transitions. [2021-06-05 15:00:41,589 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1817 transitions. Word has length 28 [2021-06-05 15:00:41,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:41,589 INFO L482 AbstractCegarLoop]: Abstraction has 740 states and 1817 transitions. [2021-06-05 15:00:41,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 15:00:41,589 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1817 transitions. [2021-06-05 15:00:41,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 15:00:41,590 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:41,590 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:41,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable755 [2021-06-05 15:00:41,791 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:41,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:41,791 INFO L82 PathProgramCache]: Analyzing trace with hash 120870266, now seen corresponding path program 66 times [2021-06-05 15:00:41,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:41,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679189445] [2021-06-05 15:00:41,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:41,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:41,878 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:41,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:41,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679189445] [2021-06-05 15:00:41,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679189445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:41,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803866629] [2021-06-05 15:00:41,879 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 15:00:41,900 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 15:00:41,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:41,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 15:00:41,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:42,113 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:42,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803866629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:42,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:42,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:00:42,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254202343] [2021-06-05 15:00:42,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:00:42,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:42,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:00:42,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:00:42,114 INFO L87 Difference]: Start difference. First operand 740 states and 1817 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 15:00:42,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:42,439 INFO L93 Difference]: Finished difference Result 866 states and 2112 transitions. [2021-06-05 15:00:42,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 15:00:42,439 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-06-05 15:00:42,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:42,440 INFO L225 Difference]: With dead ends: 866 [2021-06-05 15:00:42,440 INFO L226 Difference]: Without dead ends: 836 [2021-06-05 15:00:42,440 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 437.4ms TimeCoverageRelationStatistics Valid=182, Invalid=748, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:00:42,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2021-06-05 15:00:42,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 740. [2021-06-05 15:00:42,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 2.45872801082544) internal successors, (1817), 739 states have internal predecessors, (1817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:42,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1817 transitions. [2021-06-05 15:00:42,452 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1817 transitions. Word has length 28 [2021-06-05 15:00:42,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:42,452 INFO L482 AbstractCegarLoop]: Abstraction has 740 states and 1817 transitions. [2021-06-05 15:00:42,452 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 15:00:42,452 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1817 transitions. [2021-06-05 15:00:42,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 15:00:42,453 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:42,453 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:42,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable770,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:42,653 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:42,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:42,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1433877834, now seen corresponding path program 67 times [2021-06-05 15:00:42,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:42,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572458911] [2021-06-05 15:00:42,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:42,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:42,721 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:42,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:42,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572458911] [2021-06-05 15:00:42,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572458911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:42,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965029286] [2021-06-05 15:00:42,721 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 15:00:42,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:42,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 15:00:42,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:42,951 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:42,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965029286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:42,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:42,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:00:42,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086257151] [2021-06-05 15:00:42,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:00:42,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:42,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:00:42,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:00:42,952 INFO L87 Difference]: Start difference. First operand 740 states and 1817 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 15:00:43,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:43,342 INFO L93 Difference]: Finished difference Result 882 states and 2148 transitions. [2021-06-05 15:00:43,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:00:43,343 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-06-05 15:00:43,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:43,344 INFO L225 Difference]: With dead ends: 882 [2021-06-05 15:00:43,344 INFO L226 Difference]: Without dead ends: 844 [2021-06-05 15:00:43,344 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 467.4ms TimeCoverageRelationStatistics Valid=221, Invalid=901, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:00:43,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2021-06-05 15:00:43,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 740. [2021-06-05 15:00:43,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 2.45872801082544) internal successors, (1817), 739 states have internal predecessors, (1817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:43,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1817 transitions. [2021-06-05 15:00:43,351 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1817 transitions. Word has length 28 [2021-06-05 15:00:43,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:43,351 INFO L482 AbstractCegarLoop]: Abstraction has 740 states and 1817 transitions. [2021-06-05 15:00:43,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 15:00:43,351 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1817 transitions. [2021-06-05 15:00:43,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 15:00:43,351 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:43,352 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:43,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable782 [2021-06-05 15:00:43,557 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:43,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:43,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1396012666, now seen corresponding path program 68 times [2021-06-05 15:00:43,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:43,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206006915] [2021-06-05 15:00:43,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:43,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:43,641 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:43,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:43,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206006915] [2021-06-05 15:00:43,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206006915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:43,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119081129] [2021-06-05 15:00:43,642 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 15:00:43,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:00:43,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:43,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 15:00:43,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:43,908 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:43,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119081129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:43,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:43,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:00:43,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255368824] [2021-06-05 15:00:43,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:00:43,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:43,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:00:43,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:00:43,909 INFO L87 Difference]: Start difference. First operand 740 states and 1817 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 15:00:44,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:44,376 INFO L93 Difference]: Finished difference Result 890 states and 2172 transitions. [2021-06-05 15:00:44,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:00:44,377 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-06-05 15:00:44,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:44,377 INFO L225 Difference]: With dead ends: 890 [2021-06-05 15:00:44,377 INFO L226 Difference]: Without dead ends: 860 [2021-06-05 15:00:44,378 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 563.6ms TimeCoverageRelationStatistics Valid=218, Invalid=904, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:00:44,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2021-06-05 15:00:44,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 748. [2021-06-05 15:00:44,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 747 states have (on average 2.459170013386881) internal successors, (1837), 747 states have internal predecessors, (1837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:44,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 1837 transitions. [2021-06-05 15:00:44,384 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 1837 transitions. Word has length 28 [2021-06-05 15:00:44,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:44,385 INFO L482 AbstractCegarLoop]: Abstraction has 748 states and 1837 transitions. [2021-06-05 15:00:44,385 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 15:00:44,385 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 1837 transitions. [2021-06-05 15:00:44,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 15:00:44,385 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:44,385 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:44,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable794,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:44,586 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:44,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:44,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1639816266, now seen corresponding path program 69 times [2021-06-05 15:00:44,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:44,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549474444] [2021-06-05 15:00:44,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:44,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:44,699 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:44,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:44,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549474444] [2021-06-05 15:00:44,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549474444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:44,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246029848] [2021-06-05 15:00:44,700 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 15:00:44,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 15:00:44,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:44,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 15:00:44,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:44,925 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:44,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246029848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:44,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:44,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:00:44,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824055385] [2021-06-05 15:00:44,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:00:44,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:44,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:00:44,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:00:44,926 INFO L87 Difference]: Start difference. First operand 748 states and 1837 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 15:00:45,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:45,251 INFO L93 Difference]: Finished difference Result 882 states and 2152 transitions. [2021-06-05 15:00:45,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 15:00:45,252 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-06-05 15:00:45,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:45,253 INFO L225 Difference]: With dead ends: 882 [2021-06-05 15:00:45,253 INFO L226 Difference]: Without dead ends: 852 [2021-06-05 15:00:45,253 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 434.9ms TimeCoverageRelationStatistics Valid=189, Invalid=741, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:00:45,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 852 states. [2021-06-05 15:00:45,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 852 to 756. [2021-06-05 15:00:45,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756 states, 755 states have (on average 2.4596026490066225) internal successors, (1857), 755 states have internal predecessors, (1857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:45,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 1857 transitions. [2021-06-05 15:00:45,259 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 1857 transitions. Word has length 28 [2021-06-05 15:00:45,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:45,260 INFO L482 AbstractCegarLoop]: Abstraction has 756 states and 1857 transitions. [2021-06-05 15:00:45,260 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 15:00:45,260 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 1857 transitions. [2021-06-05 15:00:45,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 15:00:45,260 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:45,260 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:45,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable806,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:45,461 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:45,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:45,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1452125966, now seen corresponding path program 70 times [2021-06-05 15:00:45,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:45,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670545710] [2021-06-05 15:00:45,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:45,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:45,566 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:45,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:45,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670545710] [2021-06-05 15:00:45,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670545710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:45,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642076348] [2021-06-05 15:00:45,567 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 15:00:45,588 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:00:45,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:45,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 15:00:45,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:45,780 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:45,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642076348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:45,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:45,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:00:45,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683371001] [2021-06-05 15:00:45,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:00:45,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:45,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:00:45,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:00:45,781 INFO L87 Difference]: Start difference. First operand 756 states and 1857 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 15:00:46,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:46,109 INFO L93 Difference]: Finished difference Result 834 states and 2032 transitions. [2021-06-05 15:00:46,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 15:00:46,109 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-06-05 15:00:46,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:46,110 INFO L225 Difference]: With dead ends: 834 [2021-06-05 15:00:46,110 INFO L226 Difference]: Without dead ends: 804 [2021-06-05 15:00:46,110 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 409.4ms TimeCoverageRelationStatistics Valid=151, Invalid=719, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:00:46,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2021-06-05 15:00:46,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 764. [2021-06-05 15:00:46,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 763 states have (on average 2.4600262123197902) internal successors, (1877), 763 states have internal predecessors, (1877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:46,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 1877 transitions. [2021-06-05 15:00:46,117 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 1877 transitions. Word has length 28 [2021-06-05 15:00:46,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:46,117 INFO L482 AbstractCegarLoop]: Abstraction has 764 states and 1877 transitions. [2021-06-05 15:00:46,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 15:00:46,117 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 1877 transitions. [2021-06-05 15:00:46,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 15:00:46,118 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:46,118 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:46,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable816,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:46,320 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:46,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:46,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1978153802, now seen corresponding path program 71 times [2021-06-05 15:00:46,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:46,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762110022] [2021-06-05 15:00:46,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:46,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:46,440 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:46,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:46,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762110022] [2021-06-05 15:00:46,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762110022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:46,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777503777] [2021-06-05 15:00:46,441 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) [2021-06-05 15:00:46,478 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 15:00:46,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:46,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 15:00:46,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:46,646 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:46,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777503777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:46,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:46,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:00:46,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224055649] [2021-06-05 15:00:46,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:00:46,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:46,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:00:46,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:00:46,647 INFO L87 Difference]: Start difference. First operand 764 states and 1877 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 15:00:47,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:47,008 INFO L93 Difference]: Finished difference Result 938 states and 2292 transitions. [2021-06-05 15:00:47,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:00:47,008 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-06-05 15:00:47,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:47,009 INFO L225 Difference]: With dead ends: 938 [2021-06-05 15:00:47,009 INFO L226 Difference]: Without dead ends: 908 [2021-06-05 15:00:47,009 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 448.8ms TimeCoverageRelationStatistics Valid=265, Invalid=995, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:00:47,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 908 states. [2021-06-05 15:00:47,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 908 to 780. [2021-06-05 15:00:47,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 2.460847240051348) internal successors, (1917), 779 states have internal predecessors, (1917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:47,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 1917 transitions. [2021-06-05 15:00:47,016 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 1917 transitions. Word has length 28 [2021-06-05 15:00:47,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:47,017 INFO L482 AbstractCegarLoop]: Abstraction has 780 states and 1917 transitions. [2021-06-05 15:00:47,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 15:00:47,017 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 1917 transitions. [2021-06-05 15:00:47,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 15:00:47,018 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:47,018 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:47,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable826,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:47,218 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:47,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:47,218 INFO L82 PathProgramCache]: Analyzing trace with hash -59693770, now seen corresponding path program 72 times [2021-06-05 15:00:47,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:47,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141970923] [2021-06-05 15:00:47,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:47,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:47,293 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:47,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:47,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141970923] [2021-06-05 15:00:47,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141970923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:47,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521590957] [2021-06-05 15:00:47,294 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 15:00:47,315 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 15:00:47,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:47,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 15:00:47,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:47,550 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:47,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521590957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:47,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:47,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:00:47,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905169755] [2021-06-05 15:00:47,551 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:00:47,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:47,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:00:47,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:00:47,551 INFO L87 Difference]: Start difference. First operand 780 states and 1917 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 15:00:47,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:47,996 INFO L93 Difference]: Finished difference Result 890 states and 2176 transitions. [2021-06-05 15:00:47,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:00:47,996 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-06-05 15:00:47,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:47,997 INFO L225 Difference]: With dead ends: 890 [2021-06-05 15:00:47,997 INFO L226 Difference]: Without dead ends: 868 [2021-06-05 15:00:47,997 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 527.4ms TimeCoverageRelationStatistics Valid=204, Invalid=918, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:00:48,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2021-06-05 15:00:48,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 780. [2021-06-05 15:00:48,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 2.460847240051348) internal successors, (1917), 779 states have internal predecessors, (1917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:48,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 1917 transitions. [2021-06-05 15:00:48,008 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 1917 transitions. Word has length 28 [2021-06-05 15:00:48,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:48,008 INFO L482 AbstractCegarLoop]: Abstraction has 780 states and 1917 transitions. [2021-06-05 15:00:48,008 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 15:00:48,008 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 1917 transitions. [2021-06-05 15:00:48,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:00:48,009 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:48,009 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:48,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable834,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:48,210 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:48,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:48,210 INFO L82 PathProgramCache]: Analyzing trace with hash -798364280, now seen corresponding path program 73 times [2021-06-05 15:00:48,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:48,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444304728] [2021-06-05 15:00:48,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:48,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:48,355 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:48,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:48,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444304728] [2021-06-05 15:00:48,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444304728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:48,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654011370] [2021-06-05 15:00:48,356 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 15:00:48,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:48,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 15:00:48,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:48,744 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:48,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654011370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:48,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:48,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 15:00:48,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27291924] [2021-06-05 15:00:48,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:00:48,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:48,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:00:48,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:00:48,745 INFO L87 Difference]: Start difference. First operand 780 states and 1917 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:49,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:49,217 INFO L93 Difference]: Finished difference Result 1016 states and 2430 transitions. [2021-06-05 15:00:49,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:00:49,229 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:00:49,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:49,230 INFO L225 Difference]: With dead ends: 1016 [2021-06-05 15:00:49,230 INFO L226 Difference]: Without dead ends: 994 [2021-06-05 15:00:49,230 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 679.4ms TimeCoverageRelationStatistics Valid=313, Invalid=947, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:00:49,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 994 states. [2021-06-05 15:00:49,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 994 to 824. [2021-06-05 15:00:49,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 824 states, 823 states have (on average 2.4702308626974485) internal successors, (2033), 823 states have internal predecessors, (2033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:49,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 2033 transitions. [2021-06-05 15:00:49,237 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 2033 transitions. Word has length 30 [2021-06-05 15:00:49,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:49,238 INFO L482 AbstractCegarLoop]: Abstraction has 824 states and 2033 transitions. [2021-06-05 15:00:49,238 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:49,238 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 2033 transitions. [2021-06-05 15:00:49,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:00:49,239 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:49,239 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:49,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable844 [2021-06-05 15:00:49,454 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:49,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:49,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1559894852, now seen corresponding path program 74 times [2021-06-05 15:00:49,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:49,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600920068] [2021-06-05 15:00:49,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:49,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:49,580 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:49,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:49,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600920068] [2021-06-05 15:00:49,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600920068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:49,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064843887] [2021-06-05 15:00:49,581 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 15:00:49,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:00:49,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:49,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 15:00:49,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:49,866 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:49,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064843887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:49,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:49,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 15:00:49,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231770187] [2021-06-05 15:00:49,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:00:49,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:49,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:00:49,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:00:49,867 INFO L87 Difference]: Start difference. First operand 824 states and 2033 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:50,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:50,279 INFO L93 Difference]: Finished difference Result 974 states and 2388 transitions. [2021-06-05 15:00:50,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:00:50,279 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:00:50,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:50,280 INFO L225 Difference]: With dead ends: 974 [2021-06-05 15:00:50,280 INFO L226 Difference]: Without dead ends: 944 [2021-06-05 15:00:50,280 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 580.5ms TimeCoverageRelationStatistics Valid=215, Invalid=975, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:00:50,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 944 states. [2021-06-05 15:00:50,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 944 to 840. [2021-06-05 15:00:50,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 840 states, 839 states have (on average 2.470798569725864) internal successors, (2073), 839 states have internal predecessors, (2073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:50,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 2073 transitions. [2021-06-05 15:00:50,287 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 2073 transitions. Word has length 30 [2021-06-05 15:00:50,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:50,288 INFO L482 AbstractCegarLoop]: Abstraction has 840 states and 2073 transitions. [2021-06-05 15:00:50,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:50,288 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 2073 transitions. [2021-06-05 15:00:50,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:00:50,289 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:50,289 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:50,503 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable855,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:50,504 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:50,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:50,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1203309184, now seen corresponding path program 75 times [2021-06-05 15:00:50,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:50,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086286465] [2021-06-05 15:00:50,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:50,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:50,580 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:50,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:50,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086286465] [2021-06-05 15:00:50,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086286465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:50,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667000198] [2021-06-05 15:00:50,581 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 15:00:50,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 15:00:50,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:50,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 15:00:50,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:50,910 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:50,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667000198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:50,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:50,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 15:00:50,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085687303] [2021-06-05 15:00:50,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:00:50,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:50,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:00:50,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:00:50,911 INFO L87 Difference]: Start difference. First operand 840 states and 2073 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:51,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:51,505 INFO L93 Difference]: Finished difference Result 1054 states and 2584 transitions. [2021-06-05 15:00:51,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:00:51,505 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:00:51,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:51,506 INFO L225 Difference]: With dead ends: 1054 [2021-06-05 15:00:51,506 INFO L226 Difference]: Without dead ends: 1016 [2021-06-05 15:00:51,506 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 741.6ms TimeCoverageRelationStatistics Valid=308, Invalid=1252, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:00:51,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1016 states. [2021-06-05 15:00:51,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1016 to 856. [2021-06-05 15:00:51,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 855 states have (on average 2.471345029239766) internal successors, (2113), 855 states have internal predecessors, (2113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:51,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 2113 transitions. [2021-06-05 15:00:51,515 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 2113 transitions. Word has length 30 [2021-06-05 15:00:51,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:51,515 INFO L482 AbstractCegarLoop]: Abstraction has 856 states and 2113 transitions. [2021-06-05 15:00:51,515 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:51,515 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 2113 transitions. [2021-06-05 15:00:51,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:00:51,516 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:51,516 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:51,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable868,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:51,716 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:51,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:51,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1390999484, now seen corresponding path program 76 times [2021-06-05 15:00:51,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:51,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907469867] [2021-06-05 15:00:51,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:51,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:51,878 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:51,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:51,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907469867] [2021-06-05 15:00:51,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907469867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:51,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091682789] [2021-06-05 15:00:51,878 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 15:00:51,901 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:00:51,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:51,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 15:00:51,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:52,189 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:52,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091682789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:52,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:52,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 15:00:52,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923176978] [2021-06-05 15:00:52,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:00:52,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:52,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:00:52,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:00:52,190 INFO L87 Difference]: Start difference. First operand 856 states and 2113 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:52,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:52,600 INFO L93 Difference]: Finished difference Result 990 states and 2432 transitions. [2021-06-05 15:00:52,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:00:52,600 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:00:52,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:52,601 INFO L225 Difference]: With dead ends: 990 [2021-06-05 15:00:52,601 INFO L226 Difference]: Without dead ends: 968 [2021-06-05 15:00:52,601 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 652.0ms TimeCoverageRelationStatistics Valid=215, Invalid=1045, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:00:52,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 968 states. [2021-06-05 15:00:52,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 968 to 856. [2021-06-05 15:00:52,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 855 states have (on average 2.471345029239766) internal successors, (2113), 855 states have internal predecessors, (2113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:52,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 2113 transitions. [2021-06-05 15:00:52,611 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 2113 transitions. Word has length 30 [2021-06-05 15:00:52,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:52,611 INFO L482 AbstractCegarLoop]: Abstraction has 856 states and 2113 transitions. [2021-06-05 15:00:52,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:52,611 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 2113 transitions. [2021-06-05 15:00:52,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:00:52,612 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:52,612 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:52,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable883 [2021-06-05 15:00:52,812 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:52,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:52,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1816515712, now seen corresponding path program 77 times [2021-06-05 15:00:52,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:52,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838736072] [2021-06-05 15:00:52,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:52,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:52,923 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:52,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:52,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838736072] [2021-06-05 15:00:52,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838736072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:52,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770445182] [2021-06-05 15:00:52,924 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 15:00:52,951 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 15:00:52,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:52,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 15:00:52,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:53,237 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:53,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770445182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:53,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:53,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 15:00:53,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635634212] [2021-06-05 15:00:53,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:00:53,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:53,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:00:53,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:00:53,238 INFO L87 Difference]: Start difference. First operand 856 states and 2113 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:53,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:53,705 INFO L93 Difference]: Finished difference Result 1110 states and 2724 transitions. [2021-06-05 15:00:53,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:00:53,705 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:00:53,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:53,706 INFO L225 Difference]: With dead ends: 1110 [2021-06-05 15:00:53,706 INFO L226 Difference]: Without dead ends: 1072 [2021-06-05 15:00:53,706 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 632.2ms TimeCoverageRelationStatistics Valid=262, Invalid=1070, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:00:53,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2021-06-05 15:00:53,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 888. [2021-06-05 15:00:53,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 887 states have (on average 2.4723788049605413) internal successors, (2193), 887 states have internal predecessors, (2193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:53,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 2193 transitions. [2021-06-05 15:00:53,714 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 2193 transitions. Word has length 30 [2021-06-05 15:00:53,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:53,715 INFO L482 AbstractCegarLoop]: Abstraction has 888 states and 2193 transitions. [2021-06-05 15:00:53,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:53,715 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 2193 transitions. [2021-06-05 15:00:53,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:00:53,716 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:53,716 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:53,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable895 [2021-06-05 15:00:53,929 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:53,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:53,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1628825412, now seen corresponding path program 78 times [2021-06-05 15:00:53,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:53,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207639324] [2021-06-05 15:00:53,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:53,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:54,066 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:54,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:54,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207639324] [2021-06-05 15:00:54,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207639324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:54,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260150484] [2021-06-05 15:00:54,066 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 15:00:54,093 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 15:00:54,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:54,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 15:00:54,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:54,413 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:54,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260150484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:54,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:54,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 15:00:54,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087934956] [2021-06-05 15:00:54,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:00:54,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:54,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:00:54,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:00:54,414 INFO L87 Difference]: Start difference. First operand 888 states and 2193 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:54,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:54,873 INFO L93 Difference]: Finished difference Result 1158 states and 2848 transitions. [2021-06-05 15:00:54,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:00:54,873 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:00:54,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:54,874 INFO L225 Difference]: With dead ends: 1158 [2021-06-05 15:00:54,875 INFO L226 Difference]: Without dead ends: 1128 [2021-06-05 15:00:54,875 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 632.4ms TimeCoverageRelationStatistics Valid=246, Invalid=1014, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:00:54,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1128 states. [2021-06-05 15:00:54,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1128 to 896. [2021-06-05 15:00:54,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 2.4726256983240225) internal successors, (2213), 895 states have internal predecessors, (2213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:54,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2213 transitions. [2021-06-05 15:00:54,883 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2213 transitions. Word has length 30 [2021-06-05 15:00:54,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:54,883 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2213 transitions. [2021-06-05 15:00:54,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:54,883 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2213 transitions. [2021-06-05 15:00:54,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:00:54,884 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:54,884 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:55,085 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable910 [2021-06-05 15:00:55,085 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:55,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:55,085 INFO L82 PathProgramCache]: Analyzing trace with hash -236393216, now seen corresponding path program 79 times [2021-06-05 15:00:55,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:55,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761717432] [2021-06-05 15:00:55,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:55,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:55,338 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:55,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:55,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761717432] [2021-06-05 15:00:55,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761717432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:55,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950794967] [2021-06-05 15:00:55,339 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 15:00:55,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:55,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 15:00:55,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:55,679 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:55,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950794967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:55,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:55,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 15:00:55,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742285460] [2021-06-05 15:00:55,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:00:55,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:55,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:00:55,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:00:55,680 INFO L87 Difference]: Start difference. First operand 896 states and 2213 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:56,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:56,207 INFO L93 Difference]: Finished difference Result 1102 states and 2708 transitions. [2021-06-05 15:00:56,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 15:00:56,207 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:00:56,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:56,208 INFO L225 Difference]: With dead ends: 1102 [2021-06-05 15:00:56,208 INFO L226 Difference]: Without dead ends: 1072 [2021-06-05 15:00:56,208 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 840.7ms TimeCoverageRelationStatistics Valid=252, Invalid=870, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:00:56,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2021-06-05 15:00:56,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 928. [2021-06-05 15:00:56,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 928 states, 927 states have (on average 2.4735706580366776) internal successors, (2293), 927 states have internal predecessors, (2293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:56,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 2293 transitions. [2021-06-05 15:00:56,217 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 2293 transitions. Word has length 30 [2021-06-05 15:00:56,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:56,217 INFO L482 AbstractCegarLoop]: Abstraction has 928 states and 2293 transitions. [2021-06-05 15:00:56,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:56,218 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 2293 transitions. [2021-06-05 15:00:56,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:00:56,218 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:56,219 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:56,419 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable934 [2021-06-05 15:00:56,419 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:56,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:56,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1967162948, now seen corresponding path program 80 times [2021-06-05 15:00:56,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:56,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206535289] [2021-06-05 15:00:56,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:56,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:56,564 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:56,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:56,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206535289] [2021-06-05 15:00:56,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206535289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:56,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256386246] [2021-06-05 15:00:56,565 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 15:00:56,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:00:56,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:56,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 15:00:56,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:56,936 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:56,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256386246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:56,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:56,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 15:00:56,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343284403] [2021-06-05 15:00:56,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:00:56,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:56,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:00:56,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:00:56,937 INFO L87 Difference]: Start difference. First operand 928 states and 2293 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:57,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:57,540 INFO L93 Difference]: Finished difference Result 1174 states and 2888 transitions. [2021-06-05 15:00:57,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:00:57,541 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:00:57,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:57,541 INFO L225 Difference]: With dead ends: 1174 [2021-06-05 15:00:57,541 INFO L226 Difference]: Without dead ends: 1144 [2021-06-05 15:00:57,542 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 834.3ms TimeCoverageRelationStatistics Valid=259, Invalid=1073, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:00:57,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1144 states. [2021-06-05 15:00:57,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1144 to 944. [2021-06-05 15:00:57,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 944 states, 943 states have (on average 2.4740190880169672) internal successors, (2333), 943 states have internal predecessors, (2333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:57,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 944 states to 944 states and 2333 transitions. [2021-06-05 15:00:57,550 INFO L78 Accepts]: Start accepts. Automaton has 944 states and 2333 transitions. Word has length 30 [2021-06-05 15:00:57,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:57,550 INFO L482 AbstractCegarLoop]: Abstraction has 944 states and 2333 transitions. [2021-06-05 15:00:57,550 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:57,550 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states and 2333 transitions. [2021-06-05 15:00:57,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:00:57,551 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:57,551 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:57,751 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable948,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:57,752 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:57,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:57,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1448111360, now seen corresponding path program 81 times [2021-06-05 15:00:57,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:57,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806456599] [2021-06-05 15:00:57,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:57,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:57,902 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:57,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:57,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806456599] [2021-06-05 15:00:57,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806456599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:57,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152273748] [2021-06-05 15:00:57,903 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 15:00:57,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 15:00:57,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:57,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 15:00:57,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:58,216 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:58,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152273748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:58,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:58,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 15:00:58,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303402390] [2021-06-05 15:00:58,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:00:58,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:58,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:00:58,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:00:58,217 INFO L87 Difference]: Start difference. First operand 944 states and 2333 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:58,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:58,738 INFO L93 Difference]: Finished difference Result 1284 states and 3123 transitions. [2021-06-05 15:00:58,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:00:58,738 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:00:58,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:58,740 INFO L225 Difference]: With dead ends: 1284 [2021-06-05 15:00:58,740 INFO L226 Difference]: Without dead ends: 1254 [2021-06-05 15:00:58,740 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 664.6ms TimeCoverageRelationStatistics Valid=254, Invalid=1078, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:00:58,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1254 states. [2021-06-05 15:00:58,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1254 to 992. [2021-06-05 15:00:58,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 992 states, 991 states have (on average 2.4752774974772955) internal successors, (2453), 991 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 15:00:58,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 2453 transitions. [2021-06-05 15:00:58,750 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 2453 transitions. Word has length 30 [2021-06-05 15:00:58,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:58,750 INFO L482 AbstractCegarLoop]: Abstraction has 992 states and 2453 transitions. [2021-06-05 15:00:58,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:58,750 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 2453 transitions. [2021-06-05 15:00:58,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:00:58,751 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:58,751 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:58,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable963,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:58,965 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:58,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:58,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1109773824, now seen corresponding path program 82 times [2021-06-05 15:00:58,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:58,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614750172] [2021-06-05 15:00:58,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:58,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:59,121 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:59,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:59,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614750172] [2021-06-05 15:00:59,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614750172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:59,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657929955] [2021-06-05 15:00:59,122 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 15:00:59,144 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:00:59,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:59,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 15:00:59,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:59,501 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:59,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657929955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:59,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:59,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 15:00:59,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005433875] [2021-06-05 15:00:59,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:00:59,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:59,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:00:59,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:00:59,502 INFO L87 Difference]: Start difference. First operand 992 states and 2453 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:00,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:00,185 INFO L93 Difference]: Finished difference Result 1222 states and 3008 transitions. [2021-06-05 15:01:00,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:01:00,185 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:01:00,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:00,186 INFO L225 Difference]: With dead ends: 1222 [2021-06-05 15:01:00,186 INFO L226 Difference]: Without dead ends: 1192 [2021-06-05 15:01:00,186 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 918.2ms TimeCoverageRelationStatistics Valid=253, Invalid=1007, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:01:00,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1192 states. [2021-06-05 15:01:00,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1192 to 1016. [2021-06-05 15:01:00,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1016 states, 1015 states have (on average 2.475862068965517) internal successors, (2513), 1015 states have internal predecessors, (2513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:00,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1016 states to 1016 states and 2513 transitions. [2021-06-05 15:01:00,196 INFO L78 Accepts]: Start accepts. Automaton has 1016 states and 2513 transitions. Word has length 30 [2021-06-05 15:01:00,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:00,196 INFO L482 AbstractCegarLoop]: Abstraction has 1016 states and 2513 transitions. [2021-06-05 15:01:00,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:00,196 INFO L276 IsEmpty]: Start isEmpty. Operand 1016 states and 2513 transitions. [2021-06-05 15:01:00,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:01:00,197 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:00,197 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:00,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable982,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:00,413 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:00,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:00,413 INFO L82 PathProgramCache]: Analyzing trace with hash -620995908, now seen corresponding path program 83 times [2021-06-05 15:01:00,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:00,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469297134] [2021-06-05 15:01:00,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:00,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:00,575 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:00,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:00,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469297134] [2021-06-05 15:01:00,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469297134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:00,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117036340] [2021-06-05 15:01:00,576 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 15:01:00,598 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 15:01:00,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:00,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 15:01:00,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:00,926 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:00,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117036340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:00,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:00,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 15:01:00,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587763640] [2021-06-05 15:01:00,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:01:00,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:00,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:01:00,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:01:00,927 INFO L87 Difference]: Start difference. First operand 1016 states and 2513 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:01,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:01,417 INFO L93 Difference]: Finished difference Result 1302 states and 3208 transitions. [2021-06-05 15:01:01,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 15:01:01,418 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:01:01,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:01,419 INFO L225 Difference]: With dead ends: 1302 [2021-06-05 15:01:01,419 INFO L226 Difference]: Without dead ends: 1272 [2021-06-05 15:01:01,419 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 755.3ms TimeCoverageRelationStatistics Valid=216, Invalid=906, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:01:01,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1272 states. [2021-06-05 15:01:01,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1272 to 1040. [2021-06-05 15:01:01,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1040 states, 1039 states have (on average 2.4764196342637153) internal successors, (2573), 1039 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:01,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1040 states to 1040 states and 2573 transitions. [2021-06-05 15:01:01,428 INFO L78 Accepts]: Start accepts. Automaton has 1040 states and 2573 transitions. Word has length 30 [2021-06-05 15:01:01,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:01,428 INFO L482 AbstractCegarLoop]: Abstraction has 1040 states and 2573 transitions. [2021-06-05 15:01:01,428 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:01,428 INFO L276 IsEmpty]: Start isEmpty. Operand 1040 states and 2573 transitions. [2021-06-05 15:01:01,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:01:01,429 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:01,429 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:01,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable999,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:01,630 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:01,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:01,630 INFO L82 PathProgramCache]: Analyzing trace with hash -810930304, now seen corresponding path program 84 times [2021-06-05 15:01:01,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:01,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006086193] [2021-06-05 15:01:01,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:01,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:01,759 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:01,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:01,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006086193] [2021-06-05 15:01:01,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006086193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:01,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516068337] [2021-06-05 15:01:01,760 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 15:01:01,782 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 15:01:01,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:01,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 15:01:01,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:02,110 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:02,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516068337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:02,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:02,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 15:01:02,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779650637] [2021-06-05 15:01:02,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:01:02,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:02,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:01:02,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:01:02,111 INFO L87 Difference]: Start difference. First operand 1040 states and 2573 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:02,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:02,711 INFO L93 Difference]: Finished difference Result 1318 states and 3248 transitions. [2021-06-05 15:01:02,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:01:02,712 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:01:02,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:02,713 INFO L225 Difference]: With dead ends: 1318 [2021-06-05 15:01:02,713 INFO L226 Difference]: Without dead ends: 1288 [2021-06-05 15:01:02,713 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 794.2ms TimeCoverageRelationStatistics Valid=288, Invalid=1118, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:01:02,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1288 states. [2021-06-05 15:01:02,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1288 to 1048. [2021-06-05 15:01:02,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1048 states, 1047 states have (on average 2.4765998089780323) internal successors, (2593), 1047 states have internal predecessors, (2593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:02,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1048 states to 1048 states and 2593 transitions. [2021-06-05 15:01:02,722 INFO L78 Accepts]: Start accepts. Automaton has 1048 states and 2593 transitions. Word has length 30 [2021-06-05 15:01:02,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:02,722 INFO L482 AbstractCegarLoop]: Abstraction has 1048 states and 2593 transitions. [2021-06-05 15:01:02,722 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:02,722 INFO L276 IsEmpty]: Start isEmpty. Operand 1048 states and 2593 transitions. [2021-06-05 15:01:02,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:01:02,723 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:02,723 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:02,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1011 [2021-06-05 15:01:02,923 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:02,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:02,924 INFO L82 PathProgramCache]: Analyzing trace with hash 2010082424, now seen corresponding path program 85 times [2021-06-05 15:01:02,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:02,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145832305] [2021-06-05 15:01:02,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:02,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:03,026 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:03,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:03,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145832305] [2021-06-05 15:01:03,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145832305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:03,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694800898] [2021-06-05 15:01:03,027 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 15:01:03,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:03,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 15:01:03,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:03,474 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:03,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694800898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:03,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:03,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 15:01:03,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766862458] [2021-06-05 15:01:03,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:01:03,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:03,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:01:03,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:01:03,475 INFO L87 Difference]: Start difference. First operand 1048 states and 2593 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:04,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:04,342 INFO L93 Difference]: Finished difference Result 1492 states and 3643 transitions. [2021-06-05 15:01:04,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 15:01:04,343 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:01:04,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:04,344 INFO L225 Difference]: With dead ends: 1492 [2021-06-05 15:01:04,344 INFO L226 Difference]: Without dead ends: 1462 [2021-06-05 15:01:04,344 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 1109.9ms TimeCoverageRelationStatistics Valid=399, Invalid=1493, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 15:01:04,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1462 states. [2021-06-05 15:01:04,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1462 to 1152. [2021-06-05 15:01:04,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1152 states, 1151 states have (on average 2.4787141615986097) internal successors, (2853), 1151 states have internal predecessors, (2853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:04,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1152 states to 1152 states and 2853 transitions. [2021-06-05 15:01:04,355 INFO L78 Accepts]: Start accepts. Automaton has 1152 states and 2853 transitions. Word has length 30 [2021-06-05 15:01:04,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:04,355 INFO L482 AbstractCegarLoop]: Abstraction has 1152 states and 2853 transitions. [2021-06-05 15:01:04,356 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:04,356 INFO L276 IsEmpty]: Start isEmpty. Operand 1152 states and 2853 transitions. [2021-06-05 15:01:04,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:01:04,357 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:04,357 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:04,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1030,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:04,557 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:04,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:04,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1947238460, now seen corresponding path program 86 times [2021-06-05 15:01:04,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:04,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583119742] [2021-06-05 15:01:04,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:04,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:04,632 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:04,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:04,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583119742] [2021-06-05 15:01:04,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583119742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:04,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654418176] [2021-06-05 15:01:04,632 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 15:01:04,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:01:04,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:04,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 15:01:04,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:04,900 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:04,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654418176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:04,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:04,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 15:01:04,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790597933] [2021-06-05 15:01:04,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:01:04,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:04,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:01:04,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:01:04,901 INFO L87 Difference]: Start difference. First operand 1152 states and 2853 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:05,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:05,323 INFO L93 Difference]: Finished difference Result 1286 states and 3168 transitions. [2021-06-05 15:01:05,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:01:05,324 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:01:05,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:05,325 INFO L225 Difference]: With dead ends: 1286 [2021-06-05 15:01:05,325 INFO L226 Difference]: Without dead ends: 1256 [2021-06-05 15:01:05,325 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 470.9ms TimeCoverageRelationStatistics Valid=261, Invalid=1071, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:01:05,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1256 states. [2021-06-05 15:01:05,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1256 to 1168. [2021-06-05 15:01:05,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1168 states, 1167 states have (on average 2.479005998286204) internal successors, (2893), 1167 states have internal predecessors, (2893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:05,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1168 states to 1168 states and 2893 transitions. [2021-06-05 15:01:05,335 INFO L78 Accepts]: Start accepts. Automaton has 1168 states and 2893 transitions. Word has length 30 [2021-06-05 15:01:05,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:05,335 INFO L482 AbstractCegarLoop]: Abstraction has 1168 states and 2893 transitions. [2021-06-05 15:01:05,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:05,335 INFO L276 IsEmpty]: Start isEmpty. Operand 1168 states and 2893 transitions. [2021-06-05 15:01:05,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:01:05,336 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:05,336 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:05,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1050 [2021-06-05 15:01:05,537 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:05,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:05,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1965486592, now seen corresponding path program 87 times [2021-06-05 15:01:05,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:05,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116279427] [2021-06-05 15:01:05,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:05,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:05,701 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:05,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:05,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116279427] [2021-06-05 15:01:05,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116279427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:05,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987882993] [2021-06-05 15:01:05,701 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 15:01:05,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 15:01:05,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:05,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:01:05,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:05,953 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:05,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987882993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:05,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:05,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 15:01:05,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28092183] [2021-06-05 15:01:05,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:01:05,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:05,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:01:05,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:01:05,954 INFO L87 Difference]: Start difference. First operand 1168 states and 2893 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:06,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:06,405 INFO L93 Difference]: Finished difference Result 1468 states and 3583 transitions. [2021-06-05 15:01:06,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:01:06,405 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:01:06,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:06,406 INFO L225 Difference]: With dead ends: 1468 [2021-06-05 15:01:06,406 INFO L226 Difference]: Without dead ends: 1438 [2021-06-05 15:01:06,406 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 594.6ms TimeCoverageRelationStatistics Valid=258, Invalid=1074, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:01:06,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1438 states. [2021-06-05 15:01:06,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1438 to 1192. [2021-06-05 15:01:06,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1192 states, 1191 states have (on average 2.479429051217464) internal successors, (2953), 1191 states have internal predecessors, (2953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:06,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1192 states to 1192 states and 2953 transitions. [2021-06-05 15:01:06,417 INFO L78 Accepts]: Start accepts. Automaton has 1192 states and 2953 transitions. Word has length 30 [2021-06-05 15:01:06,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:06,417 INFO L482 AbstractCegarLoop]: Abstraction has 1192 states and 2953 transitions. [2021-06-05 15:01:06,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:06,417 INFO L276 IsEmpty]: Start isEmpty. Operand 1192 states and 2953 transitions. [2021-06-05 15:01:06,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:01:06,418 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:06,418 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:06,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1062,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:06,619 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:06,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:06,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1991143168, now seen corresponding path program 88 times [2021-06-05 15:01:06,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:06,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812168316] [2021-06-05 15:01:06,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:06,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:06,776 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:06,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:06,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812168316] [2021-06-05 15:01:06,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812168316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:06,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714734657] [2021-06-05 15:01:06,777 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 15:01:06,798 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:01:06,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:06,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 15:01:06,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:07,131 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:07,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714734657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:07,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:07,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 15:01:07,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984859673] [2021-06-05 15:01:07,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:01:07,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:07,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:01:07,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:01:07,132 INFO L87 Difference]: Start difference. First operand 1192 states and 2953 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:07,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:07,646 INFO L93 Difference]: Finished difference Result 1350 states and 3332 transitions. [2021-06-05 15:01:07,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 15:01:07,646 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:01:07,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:07,648 INFO L225 Difference]: With dead ends: 1350 [2021-06-05 15:01:07,648 INFO L226 Difference]: Without dead ends: 1328 [2021-06-05 15:01:07,648 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 755.7ms TimeCoverageRelationStatistics Valid=197, Invalid=925, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:01:07,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1328 states. [2021-06-05 15:01:07,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1328 to 1208. [2021-06-05 15:01:07,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1208 states, 1207 states have (on average 2.47970173985087) internal successors, (2993), 1207 states have internal predecessors, (2993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:07,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1208 states to 1208 states and 2993 transitions. [2021-06-05 15:01:07,659 INFO L78 Accepts]: Start accepts. Automaton has 1208 states and 2993 transitions. Word has length 30 [2021-06-05 15:01:07,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:07,659 INFO L482 AbstractCegarLoop]: Abstraction has 1208 states and 2993 transitions. [2021-06-05 15:01:07,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:07,659 INFO L276 IsEmpty]: Start isEmpty. Operand 1208 states and 2993 transitions. [2021-06-05 15:01:07,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:01:07,661 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:07,661 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:07,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1079 [2021-06-05 15:01:07,861 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:07,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:07,862 INFO L82 PathProgramCache]: Analyzing trace with hash 260373436, now seen corresponding path program 89 times [2021-06-05 15:01:07,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:07,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455027481] [2021-06-05 15:01:07,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:07,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:08,011 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:08,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:08,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455027481] [2021-06-05 15:01:08,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455027481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:08,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253720758] [2021-06-05 15:01:08,011 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 15:01:08,034 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 15:01:08,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:08,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 15:01:08,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:08,388 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:08,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253720758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:08,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:08,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 15:01:08,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708947525] [2021-06-05 15:01:08,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:01:08,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:08,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:01:08,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:01:08,389 INFO L87 Difference]: Start difference. First operand 1208 states and 2993 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:08,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:08,880 INFO L93 Difference]: Finished difference Result 1342 states and 3312 transitions. [2021-06-05 15:01:08,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 15:01:08,881 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:01:08,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:08,882 INFO L225 Difference]: With dead ends: 1342 [2021-06-05 15:01:08,882 INFO L226 Difference]: Without dead ends: 1320 [2021-06-05 15:01:08,882 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 728.3ms TimeCoverageRelationStatistics Valid=150, Invalid=972, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:01:08,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1320 states. [2021-06-05 15:01:08,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1320 to 1200. [2021-06-05 15:01:08,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1200 states, 1199 states have (on average 2.479566305254379) internal successors, (2973), 1199 states have internal predecessors, (2973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:08,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1200 states to 1200 states and 2973 transitions. [2021-06-05 15:01:08,893 INFO L78 Accepts]: Start accepts. Automaton has 1200 states and 2973 transitions. Word has length 30 [2021-06-05 15:01:08,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:08,893 INFO L482 AbstractCegarLoop]: Abstraction has 1200 states and 2973 transitions. [2021-06-05 15:01:08,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:08,893 INFO L276 IsEmpty]: Start isEmpty. Operand 1200 states and 2973 transitions. [2021-06-05 15:01:08,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:01:08,896 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:08,896 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:09,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1093 [2021-06-05 15:01:09,112 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:09,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:09,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1204703360, now seen corresponding path program 90 times [2021-06-05 15:01:09,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:09,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279657853] [2021-06-05 15:01:09,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:09,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:09,246 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:09,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:09,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279657853] [2021-06-05 15:01:09,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279657853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:09,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275068911] [2021-06-05 15:01:09,246 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 15:01:09,276 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 15:01:09,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:09,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 15:01:09,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:09,637 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:09,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275068911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:09,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:09,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 15:01:09,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619193319] [2021-06-05 15:01:09,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:01:09,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:09,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:01:09,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:01:09,638 INFO L87 Difference]: Start difference. First operand 1200 states and 2973 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:10,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:10,235 INFO L93 Difference]: Finished difference Result 1398 states and 3448 transitions. [2021-06-05 15:01:10,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:01:10,235 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:01:10,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:10,236 INFO L225 Difference]: With dead ends: 1398 [2021-06-05 15:01:10,236 INFO L226 Difference]: Without dead ends: 1368 [2021-06-05 15:01:10,237 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 735.4ms TimeCoverageRelationStatistics Valid=336, Invalid=1386, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 15:01:10,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1368 states. [2021-06-05 15:01:10,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1368 to 1208. [2021-06-05 15:01:10,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1208 states, 1207 states have (on average 2.47970173985087) internal successors, (2993), 1207 states have internal predecessors, (2993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:10,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1208 states to 1208 states and 2993 transitions. [2021-06-05 15:01:10,254 INFO L78 Accepts]: Start accepts. Automaton has 1208 states and 2993 transitions. Word has length 30 [2021-06-05 15:01:10,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:10,254 INFO L482 AbstractCegarLoop]: Abstraction has 1208 states and 2993 transitions. [2021-06-05 15:01:10,254 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:10,254 INFO L276 IsEmpty]: Start isEmpty. Operand 1208 states and 2993 transitions. [2021-06-05 15:01:10,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:01:10,255 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:10,255 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:10,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1108,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:10,455 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:10,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:10,456 INFO L82 PathProgramCache]: Analyzing trace with hash 70439040, now seen corresponding path program 91 times [2021-06-05 15:01:10,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:10,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151597917] [2021-06-05 15:01:10,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:10,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:10,607 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:10,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:10,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151597917] [2021-06-05 15:01:10,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151597917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:10,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663871099] [2021-06-05 15:01:10,607 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 15:01:10,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:10,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 15:01:10,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:10,924 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:10,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663871099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:10,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:10,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 15:01:10,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110834692] [2021-06-05 15:01:10,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:01:10,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:10,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:01:10,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:01:10,925 INFO L87 Difference]: Start difference. First operand 1208 states and 2993 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:11,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:11,553 INFO L93 Difference]: Finished difference Result 1462 states and 3608 transitions. [2021-06-05 15:01:11,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:01:11,553 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:01:11,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:11,554 INFO L225 Difference]: With dead ends: 1462 [2021-06-05 15:01:11,554 INFO L226 Difference]: Without dead ends: 1432 [2021-06-05 15:01:11,554 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 790.4ms TimeCoverageRelationStatistics Valid=326, Invalid=1314, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:01:11,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1432 states. [2021-06-05 15:01:11,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1432 to 1240. [2021-06-05 15:01:11,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1240 states, 1239 states have (on average 2.480225988700565) internal successors, (3073), 1239 states have internal predecessors, (3073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:11,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1240 states to 1240 states and 3073 transitions. [2021-06-05 15:01:11,565 INFO L78 Accepts]: Start accepts. Automaton has 1240 states and 3073 transitions. Word has length 30 [2021-06-05 15:01:11,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:11,565 INFO L482 AbstractCegarLoop]: Abstraction has 1240 states and 3073 transitions. [2021-06-05 15:01:11,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:11,565 INFO L276 IsEmpty]: Start isEmpty. Operand 1240 states and 3073 transitions. [2021-06-05 15:01:11,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:01:11,566 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:11,566 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:11,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1131,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:11,766 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:11,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:11,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1329577404, now seen corresponding path program 92 times [2021-06-05 15:01:11,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:11,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928288865] [2021-06-05 15:01:11,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:11,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:11,880 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:11,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:11,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928288865] [2021-06-05 15:01:11,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928288865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:11,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34418770] [2021-06-05 15:01:11,880 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 15:01:11,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:01:11,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:11,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 15:01:11,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:12,222 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:12,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34418770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:12,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:12,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 15:01:12,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253489455] [2021-06-05 15:01:12,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:01:12,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:12,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:01:12,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:01:12,223 INFO L87 Difference]: Start difference. First operand 1240 states and 3073 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:12,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:12,728 INFO L93 Difference]: Finished difference Result 1834 states and 4484 transitions. [2021-06-05 15:01:12,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:01:12,728 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:01:12,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:12,730 INFO L225 Difference]: With dead ends: 1834 [2021-06-05 15:01:12,730 INFO L226 Difference]: Without dead ends: 1776 [2021-06-05 15:01:12,730 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 658.0ms TimeCoverageRelationStatistics Valid=325, Invalid=1081, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:01:12,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1776 states. [2021-06-05 15:01:12,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1776 to 1360. [2021-06-05 15:01:12,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1360 states, 1359 states have (on average 2.487858719646799) internal successors, (3381), 1359 states have internal predecessors, (3381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:12,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1360 states to 1360 states and 3381 transitions. [2021-06-05 15:01:12,742 INFO L78 Accepts]: Start accepts. Automaton has 1360 states and 3381 transitions. Word has length 30 [2021-06-05 15:01:12,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:12,742 INFO L482 AbstractCegarLoop]: Abstraction has 1360 states and 3381 transitions. [2021-06-05 15:01:12,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:12,742 INFO L276 IsEmpty]: Start isEmpty. Operand 1360 states and 3381 transitions. [2021-06-05 15:01:12,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:01:12,743 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:12,743 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:12,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1144 [2021-06-05 15:01:12,944 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:12,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:12,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1619222852, now seen corresponding path program 93 times [2021-06-05 15:01:12,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:12,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430530417] [2021-06-05 15:01:12,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:12,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:13,064 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:13,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:13,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430530417] [2021-06-05 15:01:13,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430530417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:13,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737576540] [2021-06-05 15:01:13,065 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 15:01:13,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 15:01:13,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:13,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 15:01:13,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:13,372 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:13,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737576540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:13,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:13,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 15:01:13,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522014079] [2021-06-05 15:01:13,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:01:13,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:13,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:01:13,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:01:13,373 INFO L87 Difference]: Start difference. First operand 1360 states and 3381 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:13,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:13,774 INFO L93 Difference]: Finished difference Result 1574 states and 3896 transitions. [2021-06-05 15:01:13,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:01:13,774 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:01:13,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:13,776 INFO L225 Difference]: With dead ends: 1574 [2021-06-05 15:01:13,776 INFO L226 Difference]: Without dead ends: 1544 [2021-06-05 15:01:13,776 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 593.5ms TimeCoverageRelationStatistics Valid=223, Invalid=967, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:01:13,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2021-06-05 15:01:13,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 1376. [2021-06-05 15:01:13,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1376 states, 1375 states have (on average 2.488) internal successors, (3421), 1375 states have internal predecessors, (3421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:13,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1376 states to 1376 states and 3421 transitions. [2021-06-05 15:01:13,788 INFO L78 Accepts]: Start accepts. Automaton has 1376 states and 3421 transitions. Word has length 30 [2021-06-05 15:01:13,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:13,788 INFO L482 AbstractCegarLoop]: Abstraction has 1376 states and 3421 transitions. [2021-06-05 15:01:13,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:13,788 INFO L276 IsEmpty]: Start isEmpty. Operand 1376 states and 3421 transitions. [2021-06-05 15:01:13,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:01:13,789 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:13,789 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:13,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1156 [2021-06-05 15:01:13,990 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:13,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:13,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1975808520, now seen corresponding path program 94 times [2021-06-05 15:01:13,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:13,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009977354] [2021-06-05 15:01:13,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:13,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:14,091 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:14,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:14,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009977354] [2021-06-05 15:01:14,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009977354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:14,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237004844] [2021-06-05 15:01:14,091 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 15:01:14,112 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:01:14,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:14,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 15:01:14,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:14,424 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:14,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237004844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:14,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:14,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 15:01:14,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383253512] [2021-06-05 15:01:14,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:01:14,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:14,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:01:14,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:01:14,425 INFO L87 Difference]: Start difference. First operand 1376 states and 3421 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:14,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:14,971 INFO L93 Difference]: Finished difference Result 1646 states and 4072 transitions. [2021-06-05 15:01:14,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:01:14,971 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:01:14,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:14,973 INFO L225 Difference]: With dead ends: 1646 [2021-06-05 15:01:14,973 INFO L226 Difference]: Without dead ends: 1608 [2021-06-05 15:01:14,973 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 693.9ms TimeCoverageRelationStatistics Valid=292, Invalid=1190, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:01:14,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1608 states. [2021-06-05 15:01:14,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1608 to 1384. [2021-06-05 15:01:14,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1384 states, 1383 states have (on average 2.488069414316703) internal successors, (3441), 1383 states have internal predecessors, (3441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:14,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1384 states to 1384 states and 3441 transitions. [2021-06-05 15:01:14,986 INFO L78 Accepts]: Start accepts. Automaton has 1384 states and 3441 transitions. Word has length 30 [2021-06-05 15:01:14,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:14,986 INFO L482 AbstractCegarLoop]: Abstraction has 1384 states and 3441 transitions. [2021-06-05 15:01:14,986 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:14,986 INFO L276 IsEmpty]: Start isEmpty. Operand 1384 states and 3441 transitions. [2021-06-05 15:01:14,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:01:14,987 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:14,987 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:15,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1168 [2021-06-05 15:01:15,188 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:15,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:15,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1217793912, now seen corresponding path program 95 times [2021-06-05 15:01:15,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:15,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542360966] [2021-06-05 15:01:15,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:15,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:15,292 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:15,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:15,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542360966] [2021-06-05 15:01:15,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542360966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:15,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954135583] [2021-06-05 15:01:15,292 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 15:01:15,314 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 15:01:15,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:15,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 15:01:15,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:15,625 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:15,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954135583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:15,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:15,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 15:01:15,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815558535] [2021-06-05 15:01:15,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:01:15,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:15,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:01:15,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:01:15,626 INFO L87 Difference]: Start difference. First operand 1384 states and 3441 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:16,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:16,037 INFO L93 Difference]: Finished difference Result 1630 states and 4032 transitions. [2021-06-05 15:01:16,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 15:01:16,037 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:01:16,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:16,038 INFO L225 Difference]: With dead ends: 1630 [2021-06-05 15:01:16,038 INFO L226 Difference]: Without dead ends: 1592 [2021-06-05 15:01:16,038 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 608.2ms TimeCoverageRelationStatistics Valid=225, Invalid=897, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:01:16,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1592 states. [2021-06-05 15:01:16,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1592 to 1392. [2021-06-05 15:01:16,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1392 states, 1391 states have (on average 2.488138030194105) internal successors, (3461), 1391 states have internal predecessors, (3461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:16,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1392 states to 1392 states and 3461 transitions. [2021-06-05 15:01:16,050 INFO L78 Accepts]: Start accepts. Automaton has 1392 states and 3461 transitions. Word has length 30 [2021-06-05 15:01:16,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:16,050 INFO L482 AbstractCegarLoop]: Abstraction has 1392 states and 3461 transitions. [2021-06-05 15:01:16,050 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:16,050 INFO L276 IsEmpty]: Start isEmpty. Operand 1392 states and 3461 transitions. [2021-06-05 15:01:16,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:01:16,051 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:16,051 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:16,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1191,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:16,252 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:16,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:16,252 INFO L82 PathProgramCache]: Analyzing trace with hash 879456376, now seen corresponding path program 96 times [2021-06-05 15:01:16,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:16,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330869245] [2021-06-05 15:01:16,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:16,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:16,418 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:16,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:16,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330869245] [2021-06-05 15:01:16,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330869245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:16,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027476514] [2021-06-05 15:01:16,419 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 15:01:16,441 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 15:01:16,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:16,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 15:01:16,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:16,721 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:16,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027476514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:16,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:16,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 15:01:16,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445179712] [2021-06-05 15:01:16,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:01:16,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:16,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:01:16,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:01:16,722 INFO L87 Difference]: Start difference. First operand 1392 states and 3461 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:17,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:17,139 INFO L93 Difference]: Finished difference Result 1664 states and 4071 transitions. [2021-06-05 15:01:17,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:01:17,140 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:01:17,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:17,141 INFO L225 Difference]: With dead ends: 1664 [2021-06-05 15:01:17,141 INFO L226 Difference]: Without dead ends: 1622 [2021-06-05 15:01:17,142 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 627.7ms TimeCoverageRelationStatistics Valid=288, Invalid=972, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:01:17,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1622 states. [2021-06-05 15:01:17,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1622 to 1424. [2021-06-05 15:01:17,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1424 states, 1423 states have (on average 2.488404778636683) internal successors, (3541), 1423 states have internal predecessors, (3541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:17,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1424 states to 1424 states and 3541 transitions. [2021-06-05 15:01:17,163 INFO L78 Accepts]: Start accepts. Automaton has 1424 states and 3541 transitions. Word has length 30 [2021-06-05 15:01:17,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:17,163 INFO L482 AbstractCegarLoop]: Abstraction has 1424 states and 3541 transitions. [2021-06-05 15:01:17,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:17,163 INFO L276 IsEmpty]: Start isEmpty. Operand 1424 states and 3541 transitions. [2021-06-05 15:01:17,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:01:17,165 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:17,165 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:17,365 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1206 [2021-06-05 15:01:17,365 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:17,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:17,365 INFO L82 PathProgramCache]: Analyzing trace with hash -851313356, now seen corresponding path program 97 times [2021-06-05 15:01:17,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:17,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009084504] [2021-06-05 15:01:17,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:17,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:17,510 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:17,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:17,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009084504] [2021-06-05 15:01:17,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009084504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:17,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610646900] [2021-06-05 15:01:17,511 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 15:01:17,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:17,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 15:01:17,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:17,809 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:17,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610646900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:17,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:17,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 15:01:17,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240304168] [2021-06-05 15:01:17,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:01:17,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:17,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:01:17,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:01:17,810 INFO L87 Difference]: Start difference. First operand 1424 states and 3541 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:18,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:18,389 INFO L93 Difference]: Finished difference Result 1774 states and 4360 transitions. [2021-06-05 15:01:18,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:01:18,390 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:01:18,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:18,391 INFO L225 Difference]: With dead ends: 1774 [2021-06-05 15:01:18,391 INFO L226 Difference]: Without dead ends: 1744 [2021-06-05 15:01:18,392 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 715.2ms TimeCoverageRelationStatistics Valid=305, Invalid=1027, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:01:18,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1744 states. [2021-06-05 15:01:18,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1744 to 1432. [2021-06-05 15:01:18,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1432 states, 1431 states have (on average 2.488469601677149) internal successors, (3561), 1431 states have internal predecessors, (3561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:18,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1432 states to 1432 states and 3561 transitions. [2021-06-05 15:01:18,411 INFO L78 Accepts]: Start accepts. Automaton has 1432 states and 3561 transitions. Word has length 30 [2021-06-05 15:01:18,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:18,411 INFO L482 AbstractCegarLoop]: Abstraction has 1432 states and 3561 transitions. [2021-06-05 15:01:18,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:18,411 INFO L276 IsEmpty]: Start isEmpty. Operand 1432 states and 3561 transitions. [2021-06-05 15:01:18,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:01:18,412 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:18,412 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:18,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1218 [2021-06-05 15:01:18,628 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:18,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:18,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1486093244, now seen corresponding path program 98 times [2021-06-05 15:01:18,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:18,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159425902] [2021-06-05 15:01:18,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:18,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:18,793 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:18,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:18,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159425902] [2021-06-05 15:01:18,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159425902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:18,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522232225] [2021-06-05 15:01:18,794 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 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 15:01:18,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:01:18,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:18,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 15:01:18,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:19,089 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:19,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522232225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:19,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:19,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 15:01:19,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547858474] [2021-06-05 15:01:19,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:01:19,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:19,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:01:19,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:01:19,090 INFO L87 Difference]: Start difference. First operand 1432 states and 3561 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:19,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:19,599 INFO L93 Difference]: Finished difference Result 1646 states and 4076 transitions. [2021-06-05 15:01:19,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:01:19,600 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:01:19,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:19,601 INFO L225 Difference]: With dead ends: 1646 [2021-06-05 15:01:19,601 INFO L226 Difference]: Without dead ends: 1616 [2021-06-05 15:01:19,601 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 678.2ms TimeCoverageRelationStatistics Valid=257, Invalid=1003, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:01:19,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1616 states. [2021-06-05 15:01:19,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1616 to 1464. [2021-06-05 15:01:19,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1464 states, 1463 states have (on average 2.488721804511278) internal successors, (3641), 1463 states have internal predecessors, (3641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:19,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1464 states to 1464 states and 3641 transitions. [2021-06-05 15:01:19,614 INFO L78 Accepts]: Start accepts. Automaton has 1464 states and 3641 transitions. Word has length 30 [2021-06-05 15:01:19,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:19,614 INFO L482 AbstractCegarLoop]: Abstraction has 1464 states and 3641 transitions. [2021-06-05 15:01:19,614 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:19,614 INFO L276 IsEmpty]: Start isEmpty. Operand 1464 states and 3641 transitions. [2021-06-05 15:01:19,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:01:19,615 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:19,616 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:19,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1235 [2021-06-05 15:01:19,816 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:19,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:19,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1416441856, now seen corresponding path program 99 times [2021-06-05 15:01:19,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:19,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40701713] [2021-06-05 15:01:19,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:19,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:19,931 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:19,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:19,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40701713] [2021-06-05 15:01:19,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40701713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:19,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387953187] [2021-06-05 15:01:19,932 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 15:01:19,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 15:01:19,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:19,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 15:01:19,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:20,320 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:20,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387953187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:20,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:20,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 15:01:20,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652627538] [2021-06-05 15:01:20,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:01:20,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:20,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:01:20,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:01:20,321 INFO L87 Difference]: Start difference. First operand 1464 states and 3641 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:20,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:20,672 INFO L93 Difference]: Finished difference Result 1686 states and 4176 transitions. [2021-06-05 15:01:20,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 15:01:20,673 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:01:20,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:20,674 INFO L225 Difference]: With dead ends: 1686 [2021-06-05 15:01:20,674 INFO L226 Difference]: Without dead ends: 1656 [2021-06-05 15:01:20,674 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 610.6ms TimeCoverageRelationStatistics Valid=204, Invalid=852, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:01:20,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1656 states. [2021-06-05 15:01:20,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1656 to 1464. [2021-06-05 15:01:20,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1464 states, 1463 states have (on average 2.488721804511278) internal successors, (3641), 1463 states have internal predecessors, (3641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:20,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1464 states to 1464 states and 3641 transitions. [2021-06-05 15:01:20,686 INFO L78 Accepts]: Start accepts. Automaton has 1464 states and 3641 transitions. Word has length 30 [2021-06-05 15:01:20,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:20,686 INFO L482 AbstractCegarLoop]: Abstraction has 1464 states and 3641 transitions. [2021-06-05 15:01:20,686 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:20,686 INFO L276 IsEmpty]: Start isEmpty. Operand 1464 states and 3641 transitions. [2021-06-05 15:01:20,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:01:20,687 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:20,687 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:20,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1258,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:20,888 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:20,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:20,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1872069188, now seen corresponding path program 100 times [2021-06-05 15:01:20,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:20,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746185078] [2021-06-05 15:01:20,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:20,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:21,076 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:21,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:21,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746185078] [2021-06-05 15:01:21,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746185078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:21,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823522170] [2021-06-05 15:01:21,077 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 15:01:21,099 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:01:21,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:21,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 15:01:21,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:21,442 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:21,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823522170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:21,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:21,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 15:01:21,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82415799] [2021-06-05 15:01:21,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:01:21,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:21,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:01:21,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:01:21,443 INFO L87 Difference]: Start difference. First operand 1464 states and 3641 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:21,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:21,968 INFO L93 Difference]: Finished difference Result 1678 states and 4156 transitions. [2021-06-05 15:01:21,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:01:21,968 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:01:21,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:21,969 INFO L225 Difference]: With dead ends: 1678 [2021-06-05 15:01:21,969 INFO L226 Difference]: Without dead ends: 1648 [2021-06-05 15:01:21,969 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 792.6ms TimeCoverageRelationStatistics Valid=228, Invalid=1032, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:01:21,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1648 states. [2021-06-05 15:01:21,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1648 to 1472. [2021-06-05 15:01:21,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1472 states, 1471 states have (on average 2.488783140720598) internal successors, (3661), 1471 states have internal predecessors, (3661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:21,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1472 states to 1472 states and 3661 transitions. [2021-06-05 15:01:21,981 INFO L78 Accepts]: Start accepts. Automaton has 1472 states and 3661 transitions. Word has length 30 [2021-06-05 15:01:21,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:21,981 INFO L482 AbstractCegarLoop]: Abstraction has 1472 states and 3661 transitions. [2021-06-05 15:01:21,981 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:21,981 INFO L276 IsEmpty]: Start isEmpty. Operand 1472 states and 3661 transitions. [2021-06-05 15:01:21,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:01:21,982 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:21,982 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:22,198 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1277 [2021-06-05 15:01:22,198 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:22,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:22,199 INFO L82 PathProgramCache]: Analyzing trace with hash 848281916, now seen corresponding path program 101 times [2021-06-05 15:01:22,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:22,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248250030] [2021-06-05 15:01:22,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:22,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:22,339 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:22,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:22,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248250030] [2021-06-05 15:01:22,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248250030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:22,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49817816] [2021-06-05 15:01:22,339 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 15:01:22,362 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 15:01:22,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:22,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 15:01:22,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:22,675 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:22,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49817816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:22,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:22,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 15:01:22,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981763005] [2021-06-05 15:01:22,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:01:22,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:22,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:01:22,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:01:22,676 INFO L87 Difference]: Start difference. First operand 1472 states and 3661 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:23,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:23,215 INFO L93 Difference]: Finished difference Result 1844 states and 4531 transitions. [2021-06-05 15:01:23,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:01:23,216 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:01:23,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:23,217 INFO L225 Difference]: With dead ends: 1844 [2021-06-05 15:01:23,217 INFO L226 Difference]: Without dead ends: 1814 [2021-06-05 15:01:23,217 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 732.9ms TimeCoverageRelationStatistics Valid=261, Invalid=1145, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:01:23,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1814 states. [2021-06-05 15:01:23,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1814 to 1496. [2021-06-05 15:01:23,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1496 states, 1495 states have (on average 2.488963210702341) internal successors, (3721), 1495 states have internal predecessors, (3721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:23,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1496 states to 1496 states and 3721 transitions. [2021-06-05 15:01:23,232 INFO L78 Accepts]: Start accepts. Automaton has 1496 states and 3721 transitions. Word has length 30 [2021-06-05 15:01:23,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:23,232 INFO L482 AbstractCegarLoop]: Abstraction has 1496 states and 3721 transitions. [2021-06-05 15:01:23,232 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:23,232 INFO L276 IsEmpty]: Start isEmpty. Operand 1496 states and 3721 transitions. [2021-06-05 15:01:23,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:01:23,233 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:23,233 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:23,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1290,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:23,434 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:23,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:23,434 INFO L82 PathProgramCache]: Analyzing trace with hash 204964284, now seen corresponding path program 102 times [2021-06-05 15:01:23,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:23,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765015056] [2021-06-05 15:01:23,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:23,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:23,532 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:23,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:23,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765015056] [2021-06-05 15:01:23,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765015056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:23,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770140279] [2021-06-05 15:01:23,533 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 15:01:23,554 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 15:01:23,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:23,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 15:01:23,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:23,789 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:23,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770140279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:23,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:23,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 15:01:23,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864520251] [2021-06-05 15:01:23,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:01:23,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:23,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:01:23,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=305, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:01:23,790 INFO L87 Difference]: Start difference. First operand 1496 states and 3721 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:24,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:24,217 INFO L93 Difference]: Finished difference Result 1782 states and 4372 transitions. [2021-06-05 15:01:24,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:01:24,217 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:01:24,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:24,219 INFO L225 Difference]: With dead ends: 1782 [2021-06-05 15:01:24,219 INFO L226 Difference]: Without dead ends: 1744 [2021-06-05 15:01:24,219 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 488.8ms TimeCoverageRelationStatistics Valid=368, Invalid=1192, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:01:24,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1744 states. [2021-06-05 15:01:24,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1744 to 1536. [2021-06-05 15:01:24,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1536 states, 1535 states have (on average 2.4892508143322476) internal successors, (3821), 1535 states have internal predecessors, (3821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:24,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1536 states to 1536 states and 3821 transitions. [2021-06-05 15:01:24,234 INFO L78 Accepts]: Start accepts. Automaton has 1536 states and 3821 transitions. Word has length 30 [2021-06-05 15:01:24,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:24,234 INFO L482 AbstractCegarLoop]: Abstraction has 1536 states and 3821 transitions. [2021-06-05 15:01:24,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:24,234 INFO L276 IsEmpty]: Start isEmpty. Operand 1536 states and 3821 transitions. [2021-06-05 15:01:24,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:01:24,236 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:24,236 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:24,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1308 [2021-06-05 15:01:24,436 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:24,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:24,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1072422212, now seen corresponding path program 103 times [2021-06-05 15:01:24,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:24,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101944225] [2021-06-05 15:01:24,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:24,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:24,543 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:24,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:24,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101944225] [2021-06-05 15:01:24,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101944225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:24,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150985664] [2021-06-05 15:01:24,544 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 15:01:24,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:24,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 15:01:24,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:24,814 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:24,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150985664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:24,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:24,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 15:01:24,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380294077] [2021-06-05 15:01:24,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:01:24,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:24,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:01:24,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:01:24,815 INFO L87 Difference]: Start difference. First operand 1536 states and 3821 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:25,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:25,324 INFO L93 Difference]: Finished difference Result 1670 states and 4136 transitions. [2021-06-05 15:01:25,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:01:25,341 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:01:25,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:25,342 INFO L225 Difference]: With dead ends: 1670 [2021-06-05 15:01:25,342 INFO L226 Difference]: Without dead ends: 1640 [2021-06-05 15:01:25,342 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 544.6ms TimeCoverageRelationStatistics Valid=306, Invalid=1176, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:01:25,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1640 states. [2021-06-05 15:01:25,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1640 to 1536. [2021-06-05 15:01:25,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1536 states, 1535 states have (on average 2.4892508143322476) internal successors, (3821), 1535 states have internal predecessors, (3821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:25,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1536 states to 1536 states and 3821 transitions. [2021-06-05 15:01:25,356 INFO L78 Accepts]: Start accepts. Automaton has 1536 states and 3821 transitions. Word has length 30 [2021-06-05 15:01:25,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:25,356 INFO L482 AbstractCegarLoop]: Abstraction has 1536 states and 3821 transitions. [2021-06-05 15:01:25,356 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:25,356 INFO L276 IsEmpty]: Start isEmpty. Operand 1536 states and 3821 transitions. [2021-06-05 15:01:25,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:01:25,357 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:25,357 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:25,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1322 [2021-06-05 15:01:25,557 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:25,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:25,558 INFO L82 PathProgramCache]: Analyzing trace with hash 2105176184, now seen corresponding path program 104 times [2021-06-05 15:01:25,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:25,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864401623] [2021-06-05 15:01:25,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:25,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:25,660 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:25,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:25,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864401623] [2021-06-05 15:01:25,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864401623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:25,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428255332] [2021-06-05 15:01:25,660 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 15:01:25,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:01:25,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:25,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 15:01:25,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:25,990 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:25,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428255332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:25,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:25,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 15:01:25,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240117280] [2021-06-05 15:01:25,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:01:25,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:25,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:01:25,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:01:25,991 INFO L87 Difference]: Start difference. First operand 1536 states and 3821 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:26,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:26,506 INFO L93 Difference]: Finished difference Result 1862 states and 4616 transitions. [2021-06-05 15:01:26,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:01:26,506 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:01:26,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:26,508 INFO L225 Difference]: With dead ends: 1862 [2021-06-05 15:01:26,508 INFO L226 Difference]: Without dead ends: 1824 [2021-06-05 15:01:26,509 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 650.5ms TimeCoverageRelationStatistics Valid=263, Invalid=1069, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:01:26,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1824 states. [2021-06-05 15:01:26,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1824 to 1528. [2021-06-05 15:01:26,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1528 states, 1527 states have (on average 2.4891944990176817) internal successors, (3801), 1527 states have internal predecessors, (3801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:26,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1528 states to 1528 states and 3801 transitions. [2021-06-05 15:01:26,527 INFO L78 Accepts]: Start accepts. Automaton has 1528 states and 3801 transitions. Word has length 30 [2021-06-05 15:01:26,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:26,527 INFO L482 AbstractCegarLoop]: Abstraction has 1528 states and 3801 transitions. [2021-06-05 15:01:26,527 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:26,527 INFO L276 IsEmpty]: Start isEmpty. Operand 1528 states and 3801 transitions. [2021-06-05 15:01:26,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:01:26,529 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:26,529 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:26,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1339 [2021-06-05 15:01:26,744 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:26,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:26,745 INFO L82 PathProgramCache]: Analyzing trace with hash -207056904, now seen corresponding path program 105 times [2021-06-05 15:01:26,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:26,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120748763] [2021-06-05 15:01:26,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:26,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:26,884 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:26,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:26,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120748763] [2021-06-05 15:01:26,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120748763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:26,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010980602] [2021-06-05 15:01:26,884 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 15:01:26,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 15:01:26,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:26,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 15:01:26,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:27,196 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:27,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010980602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:27,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:27,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 15:01:27,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439105214] [2021-06-05 15:01:27,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:01:27,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:27,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:01:27,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:01:27,197 INFO L87 Difference]: Start difference. First operand 1528 states and 3801 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:27,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:27,784 INFO L93 Difference]: Finished difference Result 1806 states and 4476 transitions. [2021-06-05 15:01:27,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:01:27,785 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:01:27,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:27,786 INFO L225 Difference]: With dead ends: 1806 [2021-06-05 15:01:27,786 INFO L226 Difference]: Without dead ends: 1776 [2021-06-05 15:01:27,786 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 758.6ms TimeCoverageRelationStatistics Valid=300, Invalid=1182, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:01:27,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1776 states. [2021-06-05 15:01:27,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1776 to 1536. [2021-06-05 15:01:27,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1536 states, 1535 states have (on average 2.4892508143322476) internal successors, (3821), 1535 states have internal predecessors, (3821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:27,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1536 states to 1536 states and 3821 transitions. [2021-06-05 15:01:27,798 INFO L78 Accepts]: Start accepts. Automaton has 1536 states and 3821 transitions. Word has length 30 [2021-06-05 15:01:27,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:27,798 INFO L482 AbstractCegarLoop]: Abstraction has 1536 states and 3821 transitions. [2021-06-05 15:01:27,798 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:27,799 INFO L276 IsEmpty]: Start isEmpty. Operand 1536 states and 3821 transitions. [2021-06-05 15:01:27,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:01:27,800 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:27,800 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:28,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1364 [2021-06-05 15:01:28,013 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:28,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:28,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1255775796, now seen corresponding path program 106 times [2021-06-05 15:01:28,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:28,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830825514] [2021-06-05 15:01:28,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:28,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:28,114 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:28,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:28,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830825514] [2021-06-05 15:01:28,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830825514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:28,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304038366] [2021-06-05 15:01:28,114 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 15:01:28,140 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:28,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:28,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 15:01:28,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:28,468 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:28,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304038366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:28,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:28,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 15:01:28,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764498923] [2021-06-05 15:01:28,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:01:28,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:28,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:01:28,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:01:28,469 INFO L87 Difference]: Start difference. First operand 1536 states and 3821 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:28,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:28,929 INFO L93 Difference]: Finished difference Result 1942 states and 4776 transitions. [2021-06-05 15:01:28,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:01:28,930 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:01:28,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:28,931 INFO L225 Difference]: With dead ends: 1942 [2021-06-05 15:01:28,931 INFO L226 Difference]: Without dead ends: 1912 [2021-06-05 15:01:28,931 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 638.3ms TimeCoverageRelationStatistics Valid=277, Invalid=1055, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:01:28,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1912 states. [2021-06-05 15:01:28,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1912 to 1560. [2021-06-05 15:01:28,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1560 states, 1559 states have (on average 2.4894162924951893) internal successors, (3881), 1559 states have internal predecessors, (3881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:28,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1560 states to 1560 states and 3881 transitions. [2021-06-05 15:01:28,944 INFO L78 Accepts]: Start accepts. Automaton has 1560 states and 3881 transitions. Word has length 30 [2021-06-05 15:01:28,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:28,945 INFO L482 AbstractCegarLoop]: Abstraction has 1560 states and 3881 transitions. [2021-06-05 15:01:28,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:28,945 INFO L276 IsEmpty]: Start isEmpty. Operand 1560 states and 3881 transitions. [2021-06-05 15:01:28,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:01:28,946 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:28,946 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:29,146 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1380,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:29,146 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:29,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:29,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1646759304, now seen corresponding path program 107 times [2021-06-05 15:01:29,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:29,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996715117] [2021-06-05 15:01:29,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:29,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:29,239 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:29,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:29,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996715117] [2021-06-05 15:01:29,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996715117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:29,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044489383] [2021-06-05 15:01:29,240 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 15:01:29,264 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 15:01:29,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:29,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 15:01:29,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:29,547 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:29,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044489383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:29,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:29,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 15:01:29,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306747042] [2021-06-05 15:01:29,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:01:29,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:29,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:01:29,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:01:29,547 INFO L87 Difference]: Start difference. First operand 1560 states and 3881 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:30,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:30,008 INFO L93 Difference]: Finished difference Result 1782 states and 4420 transitions. [2021-06-05 15:01:30,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:01:30,008 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:01:30,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:30,010 INFO L225 Difference]: With dead ends: 1782 [2021-06-05 15:01:30,010 INFO L226 Difference]: Without dead ends: 1752 [2021-06-05 15:01:30,010 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 588.2ms TimeCoverageRelationStatistics Valid=277, Invalid=1129, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:01:30,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1752 states. [2021-06-05 15:01:30,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1752 to 1576. [2021-06-05 15:01:30,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1576 states, 1575 states have (on average 2.4895238095238095) internal successors, (3921), 1575 states have internal predecessors, (3921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:30,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1576 states to 1576 states and 3921 transitions. [2021-06-05 15:01:30,024 INFO L78 Accepts]: Start accepts. Automaton has 1576 states and 3921 transitions. Word has length 30 [2021-06-05 15:01:30,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:30,024 INFO L482 AbstractCegarLoop]: Abstraction has 1576 states and 3921 transitions. [2021-06-05 15:01:30,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:30,024 INFO L276 IsEmpty]: Start isEmpty. Operand 1576 states and 3921 transitions. [2021-06-05 15:01:30,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:01:30,025 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:30,026 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:30,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1395,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:30,241 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:30,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:30,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1862466628, now seen corresponding path program 108 times [2021-06-05 15:01:30,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:30,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850380409] [2021-06-05 15:01:30,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:30,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:30,320 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:30,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:30,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850380409] [2021-06-05 15:01:30,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850380409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:30,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456568028] [2021-06-05 15:01:30,320 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 15:01:30,341 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 15:01:30,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:30,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 15:01:30,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:30,573 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:30,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456568028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:30,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:30,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 15:01:30,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941451319] [2021-06-05 15:01:30,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:01:30,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:30,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:01:30,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:01:30,574 INFO L87 Difference]: Start difference. First operand 1576 states and 3921 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:30,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:30,867 INFO L93 Difference]: Finished difference Result 1702 states and 4216 transitions. [2021-06-05 15:01:30,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 15:01:30,868 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:01:30,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:30,869 INFO L225 Difference]: With dead ends: 1702 [2021-06-05 15:01:30,869 INFO L226 Difference]: Without dead ends: 1672 [2021-06-05 15:01:30,869 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 360.0ms TimeCoverageRelationStatistics Valid=190, Invalid=802, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:01:30,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1672 states. [2021-06-05 15:01:30,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1672 to 1576. [2021-06-05 15:01:30,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1576 states, 1575 states have (on average 2.4895238095238095) internal successors, (3921), 1575 states have internal predecessors, (3921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:30,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1576 states to 1576 states and 3921 transitions. [2021-06-05 15:01:30,884 INFO L78 Accepts]: Start accepts. Automaton has 1576 states and 3921 transitions. Word has length 30 [2021-06-05 15:01:30,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:30,884 INFO L482 AbstractCegarLoop]: Abstraction has 1576 states and 3921 transitions. [2021-06-05 15:01:30,884 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:30,884 INFO L276 IsEmpty]: Start isEmpty. Operand 1576 states and 3921 transitions. [2021-06-05 15:01:30,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:01:30,886 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:30,886 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:31,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1416 [2021-06-05 15:01:31,086 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:31,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:31,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1880714760, now seen corresponding path program 109 times [2021-06-05 15:01:31,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:31,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535937651] [2021-06-05 15:01:31,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:31,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:31,176 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:31,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:31,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535937651] [2021-06-05 15:01:31,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535937651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:31,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104152733] [2021-06-05 15:01:31,176 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 15:01:31,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:31,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 15:01:31,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:31,509 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:31,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104152733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:31,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:31,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 15:01:31,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634516396] [2021-06-05 15:01:31,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:01:31,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:31,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:01:31,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:01:31,510 INFO L87 Difference]: Start difference. First operand 1576 states and 3921 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:32,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:32,028 INFO L93 Difference]: Finished difference Result 1798 states and 4456 transitions. [2021-06-05 15:01:32,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:01:32,028 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:01:32,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:32,030 INFO L225 Difference]: With dead ends: 1798 [2021-06-05 15:01:32,030 INFO L226 Difference]: Without dead ends: 1768 [2021-06-05 15:01:32,030 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 684.0ms TimeCoverageRelationStatistics Valid=320, Invalid=1240, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:01:32,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1768 states. [2021-06-05 15:01:32,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1768 to 1584. [2021-06-05 15:01:32,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1584 states, 1583 states have (on average 2.4895767530006316) internal successors, (3941), 1583 states have internal predecessors, (3941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:32,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1584 states to 1584 states and 3941 transitions. [2021-06-05 15:01:32,043 INFO L78 Accepts]: Start accepts. Automaton has 1584 states and 3941 transitions. Word has length 30 [2021-06-05 15:01:32,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:32,043 INFO L482 AbstractCegarLoop]: Abstraction has 1584 states and 3941 transitions. [2021-06-05 15:01:32,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:32,044 INFO L276 IsEmpty]: Start isEmpty. Operand 1584 states and 3941 transitions. [2021-06-05 15:01:32,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:01:32,045 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:32,045 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:32,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1429,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:32,245 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:32,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:32,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1693024460, now seen corresponding path program 110 times [2021-06-05 15:01:32,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:32,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821810953] [2021-06-05 15:01:32,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:32,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:32,329 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:32,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:32,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821810953] [2021-06-05 15:01:32,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821810953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:32,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025668622] [2021-06-05 15:01:32,330 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 15:01:32,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:01:32,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:32,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 15:01:32,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:32,709 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:32,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025668622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:32,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:32,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 15:01:32,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134666215] [2021-06-05 15:01:32,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:01:32,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:32,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:01:32,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:01:32,710 INFO L87 Difference]: Start difference. First operand 1584 states and 3941 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:33,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:33,286 INFO L93 Difference]: Finished difference Result 1894 states and 4656 transitions. [2021-06-05 15:01:33,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:01:33,286 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:01:33,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:33,288 INFO L225 Difference]: With dead ends: 1894 [2021-06-05 15:01:33,288 INFO L226 Difference]: Without dead ends: 1864 [2021-06-05 15:01:33,288 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 755.4ms TimeCoverageRelationStatistics Valid=318, Invalid=1088, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:01:33,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1864 states. [2021-06-05 15:01:33,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1864 to 1600. [2021-06-05 15:01:33,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1600 states, 1599 states have (on average 2.4896810506566602) internal successors, (3981), 1599 states have internal predecessors, (3981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:33,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1600 states to 1600 states and 3981 transitions. [2021-06-05 15:01:33,303 INFO L78 Accepts]: Start accepts. Automaton has 1600 states and 3981 transitions. Word has length 30 [2021-06-05 15:01:33,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:33,303 INFO L482 AbstractCegarLoop]: Abstraction has 1600 states and 3981 transitions. [2021-06-05 15:01:33,303 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:33,303 INFO L276 IsEmpty]: Start isEmpty. Operand 1600 states and 3981 transitions. [2021-06-05 15:01:33,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:01:33,304 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:33,304 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:33,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1442 [2021-06-05 15:01:33,505 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:33,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:33,505 INFO L82 PathProgramCache]: Analyzing trace with hash -300592264, now seen corresponding path program 111 times [2021-06-05 15:01:33,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:33,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909707088] [2021-06-05 15:01:33,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:33,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:33,605 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:33,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:33,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909707088] [2021-06-05 15:01:33,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909707088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:33,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927760689] [2021-06-05 15:01:33,605 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 15:01:33,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 15:01:33,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:33,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 15:01:33,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:33,906 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:33,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927760689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:33,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:33,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 15:01:33,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172172952] [2021-06-05 15:01:33,906 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:01:33,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:33,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:01:33,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:01:33,907 INFO L87 Difference]: Start difference. First operand 1600 states and 3981 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:34,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:34,314 INFO L93 Difference]: Finished difference Result 2008 states and 4927 transitions. [2021-06-05 15:01:34,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:01:34,314 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:01:34,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:34,316 INFO L225 Difference]: With dead ends: 2008 [2021-06-05 15:01:34,316 INFO L226 Difference]: Without dead ends: 1958 [2021-06-05 15:01:34,316 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 531.4ms TimeCoverageRelationStatistics Valid=247, Invalid=943, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:01:34,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1958 states. [2021-06-05 15:01:34,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1958 to 1640. [2021-06-05 15:01:34,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1640 states, 1639 states have (on average 2.48993288590604) internal successors, (4081), 1639 states have internal predecessors, (4081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:34,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1640 states to 1640 states and 4081 transitions. [2021-06-05 15:01:34,333 INFO L78 Accepts]: Start accepts. Automaton has 1640 states and 4081 transitions. Word has length 30 [2021-06-05 15:01:34,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:34,333 INFO L482 AbstractCegarLoop]: Abstraction has 1640 states and 4081 transitions. [2021-06-05 15:01:34,333 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:34,333 INFO L276 IsEmpty]: Start isEmpty. Operand 1640 states and 4081 transitions. [2021-06-05 15:01:34,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:01:34,335 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:34,335 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:34,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1465 [2021-06-05 15:01:34,549 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:34,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:34,549 INFO L82 PathProgramCache]: Analyzing trace with hash -2031361996, now seen corresponding path program 112 times [2021-06-05 15:01:34,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:34,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524290972] [2021-06-05 15:01:34,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:34,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:34,639 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:34,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:34,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524290972] [2021-06-05 15:01:34,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524290972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:34,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892133404] [2021-06-05 15:01:34,640 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 15:01:34,664 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:01:34,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:34,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 15:01:34,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:34,948 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:34,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892133404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:34,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:34,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 15:01:34,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826962948] [2021-06-05 15:01:34,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:01:34,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:34,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:01:34,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:01:34,948 INFO L87 Difference]: Start difference. First operand 1640 states and 4081 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:35,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:35,413 INFO L93 Difference]: Finished difference Result 2030 states and 5000 transitions. [2021-06-05 15:01:35,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:01:35,413 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:01:35,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:35,415 INFO L225 Difference]: With dead ends: 2030 [2021-06-05 15:01:35,415 INFO L226 Difference]: Without dead ends: 2000 [2021-06-05 15:01:35,415 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 616.0ms TimeCoverageRelationStatistics Valid=276, Invalid=984, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:01:35,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2000 states. [2021-06-05 15:01:35,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2000 to 1648. [2021-06-05 15:01:35,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1648 states, 1647 states have (on average 2.4899817850637525) internal successors, (4101), 1647 states have internal predecessors, (4101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:35,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1648 states to 1648 states and 4101 transitions. [2021-06-05 15:01:35,430 INFO L78 Accepts]: Start accepts. Automaton has 1648 states and 4101 transitions. Word has length 30 [2021-06-05 15:01:35,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:35,430 INFO L482 AbstractCegarLoop]: Abstraction has 1648 states and 4101 transitions. [2021-06-05 15:01:35,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:35,430 INFO L276 IsEmpty]: Start isEmpty. Operand 1648 states and 4101 transitions. [2021-06-05 15:01:35,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:01:35,432 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:35,432 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:35,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1477 [2021-06-05 15:01:35,632 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:35,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:35,632 INFO L82 PathProgramCache]: Analyzing trace with hash -756219596, now seen corresponding path program 113 times [2021-06-05 15:01:35,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:35,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103812200] [2021-06-05 15:01:35,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:35,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:35,727 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:35,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:35,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103812200] [2021-06-05 15:01:35,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103812200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:35,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136440329] [2021-06-05 15:01:35,727 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 15:01:35,749 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 15:01:35,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:35,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 15:01:35,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:36,031 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:36,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136440329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:36,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:36,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 15:01:36,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926491015] [2021-06-05 15:01:36,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:01:36,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:36,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:01:36,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:01:36,032 INFO L87 Difference]: Start difference. First operand 1648 states and 4101 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:36,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:36,550 INFO L93 Difference]: Finished difference Result 2030 states and 4996 transitions. [2021-06-05 15:01:36,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:01:36,550 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:01:36,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:36,552 INFO L225 Difference]: With dead ends: 2030 [2021-06-05 15:01:36,552 INFO L226 Difference]: Without dead ends: 2000 [2021-06-05 15:01:36,552 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 683.9ms TimeCoverageRelationStatistics Valid=332, Invalid=1150, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:01:36,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2000 states. [2021-06-05 15:01:36,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2000 to 1672. [2021-06-05 15:01:36,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1672 states, 1671 states have (on average 2.490125673249551) internal successors, (4161), 1671 states have internal predecessors, (4161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:36,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1672 states to 1672 states and 4161 transitions. [2021-06-05 15:01:36,566 INFO L78 Accepts]: Start accepts. Automaton has 1672 states and 4161 transitions. Word has length 30 [2021-06-05 15:01:36,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:36,566 INFO L482 AbstractCegarLoop]: Abstraction has 1672 states and 4161 transitions. [2021-06-05 15:01:36,567 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:36,567 INFO L276 IsEmpty]: Start isEmpty. Operand 1672 states and 4161 transitions. [2021-06-05 15:01:36,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:01:36,568 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:36,568 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:36,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1495 [2021-06-05 15:01:36,769 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:36,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:36,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1490022136, now seen corresponding path program 4 times [2021-06-05 15:01:36,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:36,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480627843] [2021-06-05 15:01:36,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:36,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:37,142 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:37,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:37,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480627843] [2021-06-05 15:01:37,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480627843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:37,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094719071] [2021-06-05 15:01:37,143 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 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 15:01:37,182 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:01:37,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:37,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 15:01:37,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:37,437 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:37,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094719071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:37,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:37,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 15:01:37,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115780369] [2021-06-05 15:01:37,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:01:37,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:37,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:01:37,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:01:37,438 INFO L87 Difference]: Start difference. First operand 1672 states and 4161 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:37,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:37,866 INFO L93 Difference]: Finished difference Result 1774 states and 4388 transitions. [2021-06-05 15:01:37,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:01:37,866 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:01:37,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:37,868 INFO L225 Difference]: With dead ends: 1774 [2021-06-05 15:01:37,868 INFO L226 Difference]: Without dead ends: 1728 [2021-06-05 15:01:37,868 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 644.9ms TimeCoverageRelationStatistics Valid=250, Invalid=940, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:01:37,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1728 states. [2021-06-05 15:01:37,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1728 to 1696. [2021-06-05 15:01:37,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1696 states, 1695 states have (on average 2.4902654867256637) internal successors, (4221), 1695 states have internal predecessors, (4221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:37,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1696 states to 1696 states and 4221 transitions. [2021-06-05 15:01:37,882 INFO L78 Accepts]: Start accepts. Automaton has 1696 states and 4221 transitions. Word has length 30 [2021-06-05 15:01:37,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:37,882 INFO L482 AbstractCegarLoop]: Abstraction has 1696 states and 4221 transitions. [2021-06-05 15:01:37,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:37,882 INFO L276 IsEmpty]: Start isEmpty. Operand 1696 states and 4221 transitions. [2021-06-05 15:01:37,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:01:37,883 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:37,883 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:38,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1513 [2021-06-05 15:01:38,084 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:38,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:38,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1989405762, now seen corresponding path program 114 times [2021-06-05 15:01:38,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:38,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412475147] [2021-06-05 15:01:38,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:38,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:38,246 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:38,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:38,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412475147] [2021-06-05 15:01:38,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412475147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:38,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48049330] [2021-06-05 15:01:38,247 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 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 15:01:38,270 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 15:01:38,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:38,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 15:01:38,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:38,517 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:38,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48049330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:38,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:38,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:01:38,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722283863] [2021-06-05 15:01:38,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:01:38,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:38,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:01:38,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:01:38,518 INFO L87 Difference]: Start difference. First operand 1696 states and 4221 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:38,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:38,986 INFO L93 Difference]: Finished difference Result 1846 states and 4580 transitions. [2021-06-05 15:01:38,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:01:38,987 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:01:38,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:38,988 INFO L225 Difference]: With dead ends: 1846 [2021-06-05 15:01:38,988 INFO L226 Difference]: Without dead ends: 1824 [2021-06-05 15:01:38,989 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 645.5ms TimeCoverageRelationStatistics Valid=274, Invalid=1366, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:01:38,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1824 states. [2021-06-05 15:01:39,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1824 to 1704. [2021-06-05 15:01:39,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1704 states, 1703 states have (on average 2.490311215502055) internal successors, (4241), 1703 states have internal predecessors, (4241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:39,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1704 states to 1704 states and 4241 transitions. [2021-06-05 15:01:39,004 INFO L78 Accepts]: Start accepts. Automaton has 1704 states and 4241 transitions. Word has length 32 [2021-06-05 15:01:39,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:39,005 INFO L482 AbstractCegarLoop]: Abstraction has 1704 states and 4241 transitions. [2021-06-05 15:01:39,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:39,005 INFO L276 IsEmpty]: Start isEmpty. Operand 1704 states and 4241 transitions. [2021-06-05 15:01:39,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:01:39,006 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:39,006 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:39,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1528,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:39,217 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:39,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:39,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1783467330, now seen corresponding path program 115 times [2021-06-05 15:01:39,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:39,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877936524] [2021-06-05 15:01:39,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:39,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:39,445 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:39,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:39,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877936524] [2021-06-05 15:01:39,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877936524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:39,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837312019] [2021-06-05 15:01:39,445 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 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 15:01:39,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:39,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:01:39,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:39,797 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:39,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837312019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:39,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:39,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:01:39,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450280173] [2021-06-05 15:01:39,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:01:39,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:39,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:01:39,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:01:39,798 INFO L87 Difference]: Start difference. First operand 1704 states and 4241 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:40,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:40,502 INFO L93 Difference]: Finished difference Result 1926 states and 4776 transitions. [2021-06-05 15:01:40,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:01:40,506 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:01:40,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:40,508 INFO L225 Difference]: With dead ends: 1926 [2021-06-05 15:01:40,508 INFO L226 Difference]: Without dead ends: 1896 [2021-06-05 15:01:40,508 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 907.2ms TimeCoverageRelationStatistics Valid=342, Invalid=1638, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 15:01:40,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1896 states. [2021-06-05 15:01:40,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1896 to 1704. [2021-06-05 15:01:40,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1704 states, 1703 states have (on average 2.490311215502055) internal successors, (4241), 1703 states have internal predecessors, (4241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:40,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1704 states to 1704 states and 4241 transitions. [2021-06-05 15:01:40,524 INFO L78 Accepts]: Start accepts. Automaton has 1704 states and 4241 transitions. Word has length 32 [2021-06-05 15:01:40,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:40,524 INFO L482 AbstractCegarLoop]: Abstraction has 1704 states and 4241 transitions. [2021-06-05 15:01:40,524 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:40,524 INFO L276 IsEmpty]: Start isEmpty. Operand 1704 states and 4241 transitions. [2021-06-05 15:01:40,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:01:40,526 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:40,526 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:40,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1537 [2021-06-05 15:01:40,742 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:40,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:40,742 INFO L82 PathProgramCache]: Analyzing trace with hash 700350598, now seen corresponding path program 116 times [2021-06-05 15:01:40,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:40,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459219390] [2021-06-05 15:01:40,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:40,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:41,040 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:41,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:41,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459219390] [2021-06-05 15:01:41,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459219390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:41,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138282764] [2021-06-05 15:01:41,041 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 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 15:01:41,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:01:41,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:41,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:01:41,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:41,404 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:41,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138282764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:41,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:41,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:01:41,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248599850] [2021-06-05 15:01:41,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:01:41,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:41,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:01:41,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:01:41,405 INFO L87 Difference]: Start difference. First operand 1704 states and 4241 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:41,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:41,936 INFO L93 Difference]: Finished difference Result 1870 states and 4636 transitions. [2021-06-05 15:01:41,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:01:41,936 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:01:41,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:41,938 INFO L225 Difference]: With dead ends: 1870 [2021-06-05 15:01:41,938 INFO L226 Difference]: Without dead ends: 1840 [2021-06-05 15:01:41,938 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 886.9ms TimeCoverageRelationStatistics Valid=197, Invalid=1135, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:01:41,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1840 states. [2021-06-05 15:01:41,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1840 to 1720. [2021-06-05 15:01:41,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1720 states, 1719 states have (on average 2.4904013961605584) internal successors, (4281), 1719 states have internal predecessors, (4281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:41,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1720 states to 1720 states and 4281 transitions. [2021-06-05 15:01:41,953 INFO L78 Accepts]: Start accepts. Automaton has 1720 states and 4281 transitions. Word has length 32 [2021-06-05 15:01:41,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:41,953 INFO L482 AbstractCegarLoop]: Abstraction has 1720 states and 4281 transitions. [2021-06-05 15:01:41,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:41,953 INFO L276 IsEmpty]: Start isEmpty. Operand 1720 states and 4281 transitions. [2021-06-05 15:01:41,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:01:41,954 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:41,954 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:42,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1550 [2021-06-05 15:01:42,169 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:42,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:42,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1799471366, now seen corresponding path program 117 times [2021-06-05 15:01:42,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:42,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804243662] [2021-06-05 15:01:42,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:42,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:42,552 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:42,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:42,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804243662] [2021-06-05 15:01:42,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804243662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:42,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416619964] [2021-06-05 15:01:42,552 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 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 15:01:42,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 15:01:42,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:42,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:01:42,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:42,871 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:42,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416619964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:42,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:42,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:01:42,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793666977] [2021-06-05 15:01:42,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:01:42,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:42,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:01:42,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:01:42,872 INFO L87 Difference]: Start difference. First operand 1720 states and 4281 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:43,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:43,460 INFO L93 Difference]: Finished difference Result 2022 states and 5012 transitions. [2021-06-05 15:01:43,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:01:43,461 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:01:43,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:43,462 INFO L225 Difference]: With dead ends: 2022 [2021-06-05 15:01:43,462 INFO L226 Difference]: Without dead ends: 1984 [2021-06-05 15:01:43,463 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 736.9ms TimeCoverageRelationStatistics Valid=340, Invalid=1640, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 15:01:43,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1984 states. [2021-06-05 15:01:43,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1984 to 1744. [2021-06-05 15:01:43,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1744 states, 1743 states have (on average 2.4905335628227196) internal successors, (4341), 1743 states have internal predecessors, (4341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:43,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1744 states to 1744 states and 4341 transitions. [2021-06-05 15:01:43,480 INFO L78 Accepts]: Start accepts. Automaton has 1744 states and 4341 transitions. Word has length 32 [2021-06-05 15:01:43,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:43,480 INFO L482 AbstractCegarLoop]: Abstraction has 1744 states and 4341 transitions. [2021-06-05 15:01:43,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:43,480 INFO L276 IsEmpty]: Start isEmpty. Operand 1744 states and 4341 transitions. [2021-06-05 15:01:43,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:01:43,481 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:43,481 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:43,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1565 [2021-06-05 15:01:43,697 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:43,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:43,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1236357566, now seen corresponding path program 118 times [2021-06-05 15:01:43,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:43,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350370214] [2021-06-05 15:01:43,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:43,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:43,939 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:43,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:43,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350370214] [2021-06-05 15:01:43,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350370214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:43,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586850714] [2021-06-05 15:01:43,940 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 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 15:01:43,965 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:01:43,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:43,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:01:43,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:44,320 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:44,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586850714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:44,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:44,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:01:44,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832430964] [2021-06-05 15:01:44,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:01:44,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:44,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:01:44,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:01:44,321 INFO L87 Difference]: Start difference. First operand 1744 states and 4341 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:44,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:44,866 INFO L93 Difference]: Finished difference Result 1910 states and 4736 transitions. [2021-06-05 15:01:44,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:01:44,866 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:01:44,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:44,868 INFO L225 Difference]: With dead ends: 1910 [2021-06-05 15:01:44,868 INFO L226 Difference]: Without dead ends: 1880 [2021-06-05 15:01:44,868 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 848.1ms TimeCoverageRelationStatistics Valid=226, Invalid=1106, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:01:44,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1880 states. [2021-06-05 15:01:44,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1880 to 1752. [2021-06-05 15:01:44,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1752 states, 1751 states have (on average 2.4905768132495716) internal successors, (4361), 1751 states have internal predecessors, (4361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:44,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1752 states to 1752 states and 4361 transitions. [2021-06-05 15:01:44,884 INFO L78 Accepts]: Start accepts. Automaton has 1752 states and 4361 transitions. Word has length 32 [2021-06-05 15:01:44,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:44,884 INFO L482 AbstractCegarLoop]: Abstraction has 1752 states and 4361 transitions. [2021-06-05 15:01:44,884 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:44,885 INFO L276 IsEmpty]: Start isEmpty. Operand 1752 states and 4361 transitions. [2021-06-05 15:01:44,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:01:44,886 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:44,886 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:45,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1583 [2021-06-05 15:01:45,088 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:45,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:45,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1048667266, now seen corresponding path program 119 times [2021-06-05 15:01:45,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:45,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509541001] [2021-06-05 15:01:45,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:45,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:45,249 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:45,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:45,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509541001] [2021-06-05 15:01:45,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509541001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:45,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982714964] [2021-06-05 15:01:45,250 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 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 15:01:45,274 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 15:01:45,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:45,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:01:45,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:45,651 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:45,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982714964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:45,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:45,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:01:45,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820376826] [2021-06-05 15:01:45,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:01:45,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:45,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:01:45,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:01:45,653 INFO L87 Difference]: Start difference. First operand 1752 states and 4361 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:46,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:46,149 INFO L93 Difference]: Finished difference Result 1950 states and 4840 transitions. [2021-06-05 15:01:46,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:01:46,150 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:01:46,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:46,151 INFO L225 Difference]: With dead ends: 1950 [2021-06-05 15:01:46,151 INFO L226 Difference]: Without dead ends: 1928 [2021-06-05 15:01:46,152 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 737.2ms TimeCoverageRelationStatistics Valid=238, Invalid=1402, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:01:46,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1928 states. [2021-06-05 15:01:46,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1928 to 1752. [2021-06-05 15:01:46,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1752 states, 1751 states have (on average 2.4905768132495716) internal successors, (4361), 1751 states have internal predecessors, (4361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:46,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1752 states to 1752 states and 4361 transitions. [2021-06-05 15:01:46,170 INFO L78 Accepts]: Start accepts. Automaton has 1752 states and 4361 transitions. Word has length 32 [2021-06-05 15:01:46,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:46,170 INFO L482 AbstractCegarLoop]: Abstraction has 1752 states and 4361 transitions. [2021-06-05 15:01:46,170 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:46,170 INFO L276 IsEmpty]: Start isEmpty. Operand 1752 states and 4361 transitions. [2021-06-05 15:01:46,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:01:46,171 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:46,171 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:46,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1598 [2021-06-05 15:01:46,372 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:46,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:46,372 INFO L82 PathProgramCache]: Analyzing trace with hash 343764930, now seen corresponding path program 120 times [2021-06-05 15:01:46,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:46,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083529850] [2021-06-05 15:01:46,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:46,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:46,608 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:46,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:46,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083529850] [2021-06-05 15:01:46,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083529850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:46,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695960516] [2021-06-05 15:01:46,609 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 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 15:01:46,639 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 15:01:46,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:46,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:01:46,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:47,028 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:47,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695960516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:47,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:47,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:01:47,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038677870] [2021-06-05 15:01:47,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:01:47,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:47,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:01:47,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:01:47,028 INFO L87 Difference]: Start difference. First operand 1752 states and 4361 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:47,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:47,871 INFO L93 Difference]: Finished difference Result 1950 states and 4840 transitions. [2021-06-05 15:01:47,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:01:47,871 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:01:47,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:47,873 INFO L225 Difference]: With dead ends: 1950 [2021-06-05 15:01:47,873 INFO L226 Difference]: Without dead ends: 1928 [2021-06-05 15:01:47,873 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 1095.4ms TimeCoverageRelationStatistics Valid=321, Invalid=1485, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:01:47,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1928 states. [2021-06-05 15:01:47,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1928 to 1776. [2021-06-05 15:01:47,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1776 states, 1775 states have (on average 2.4907042253521126) internal successors, (4421), 1775 states have internal predecessors, (4421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:47,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1776 states to 1776 states and 4421 transitions. [2021-06-05 15:01:47,888 INFO L78 Accepts]: Start accepts. Automaton has 1776 states and 4421 transitions. Word has length 32 [2021-06-05 15:01:47,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:47,888 INFO L482 AbstractCegarLoop]: Abstraction has 1776 states and 4421 transitions. [2021-06-05 15:01:47,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:47,888 INFO L276 IsEmpty]: Start isEmpty. Operand 1776 states and 4421 transitions. [2021-06-05 15:01:47,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:01:47,889 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:47,890 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:48,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1625 [2021-06-05 15:01:48,106 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:48,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:48,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1387004802, now seen corresponding path program 121 times [2021-06-05 15:01:48,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:48,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154610087] [2021-06-05 15:01:48,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:48,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:48,248 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:48,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:48,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154610087] [2021-06-05 15:01:48,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154610087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:48,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192670115] [2021-06-05 15:01:48,249 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 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 15:01:48,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:48,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:01:48,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:48,692 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:48,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192670115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:48,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:48,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:01:48,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435443075] [2021-06-05 15:01:48,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:01:48,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:48,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:01:48,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:01:48,697 INFO L87 Difference]: Start difference. First operand 1776 states and 4421 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:49,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:49,447 INFO L93 Difference]: Finished difference Result 1942 states and 4820 transitions. [2021-06-05 15:01:49,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:01:49,447 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:01:49,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:49,449 INFO L225 Difference]: With dead ends: 1942 [2021-06-05 15:01:49,449 INFO L226 Difference]: Without dead ends: 1920 [2021-06-05 15:01:49,449 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 1020.6ms TimeCoverageRelationStatistics Valid=243, Invalid=1397, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:01:49,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1920 states. [2021-06-05 15:01:49,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1920 to 1776. [2021-06-05 15:01:49,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1776 states, 1775 states have (on average 2.4907042253521126) internal successors, (4421), 1775 states have internal predecessors, (4421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:49,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1776 states to 1776 states and 4421 transitions. [2021-06-05 15:01:49,465 INFO L78 Accepts]: Start accepts. Automaton has 1776 states and 4421 transitions. Word has length 32 [2021-06-05 15:01:49,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:49,465 INFO L482 AbstractCegarLoop]: Abstraction has 1776 states and 4421 transitions. [2021-06-05 15:01:49,465 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:49,465 INFO L276 IsEmpty]: Start isEmpty. Operand 1776 states and 4421 transitions. [2021-06-05 15:01:49,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:01:49,467 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:49,467 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:49,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1647 [2021-06-05 15:01:49,681 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:49,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:49,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1405252934, now seen corresponding path program 122 times [2021-06-05 15:01:49,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:49,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073312842] [2021-06-05 15:01:49,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:49,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:49,831 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:49,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:49,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073312842] [2021-06-05 15:01:49,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073312842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:49,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220418098] [2021-06-05 15:01:49,832 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 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 15:01:49,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:01:49,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:49,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:01:49,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:50,253 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:50,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220418098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:50,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:50,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:01:50,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467736776] [2021-06-05 15:01:50,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:01:50,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:50,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:01:50,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:01:50,254 INFO L87 Difference]: Start difference. First operand 1776 states and 4421 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:50,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:50,936 INFO L93 Difference]: Finished difference Result 1966 states and 4872 transitions. [2021-06-05 15:01:50,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:01:50,937 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:01:50,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:50,938 INFO L225 Difference]: With dead ends: 1966 [2021-06-05 15:01:50,939 INFO L226 Difference]: Without dead ends: 1928 [2021-06-05 15:01:50,939 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 953.0ms TimeCoverageRelationStatistics Valid=316, Invalid=1576, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 15:01:50,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1928 states. [2021-06-05 15:01:50,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1928 to 1792. [2021-06-05 15:01:50,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1792 states, 1791 states have (on average 2.490787269681742) internal successors, (4461), 1791 states have internal predecessors, (4461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:50,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1792 states to 1792 states and 4461 transitions. [2021-06-05 15:01:50,955 INFO L78 Accepts]: Start accepts. Automaton has 1792 states and 4461 transitions. Word has length 32 [2021-06-05 15:01:50,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:50,955 INFO L482 AbstractCegarLoop]: Abstraction has 1792 states and 4461 transitions. [2021-06-05 15:01:50,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:50,955 INFO L276 IsEmpty]: Start isEmpty. Operand 1792 states and 4461 transitions. [2021-06-05 15:01:50,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:01:50,957 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:50,957 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:51,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1664,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:51,173 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:51,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:51,173 INFO L82 PathProgramCache]: Analyzing trace with hash 2028269506, now seen corresponding path program 123 times [2021-06-05 15:01:51,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:51,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826379077] [2021-06-05 15:01:51,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:51,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:51,459 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:51,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:51,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826379077] [2021-06-05 15:01:51,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826379077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:51,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439472917] [2021-06-05 15:01:51,460 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 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 15:01:51,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 15:01:51,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:51,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:01:51,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:51,812 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:51,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439472917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:51,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:51,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:01:51,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869446047] [2021-06-05 15:01:51,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:01:51,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:51,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:01:51,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:01:51,813 INFO L87 Difference]: Start difference. First operand 1792 states and 4461 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:52,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:52,367 INFO L93 Difference]: Finished difference Result 1966 states and 4876 transitions. [2021-06-05 15:01:52,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:01:52,367 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:01:52,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:52,368 INFO L225 Difference]: With dead ends: 1966 [2021-06-05 15:01:52,369 INFO L226 Difference]: Without dead ends: 1936 [2021-06-05 15:01:52,369 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 850.5ms TimeCoverageRelationStatistics Valid=282, Invalid=1358, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:01:52,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1936 states. [2021-06-05 15:01:52,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1936 to 1800. [2021-06-05 15:01:52,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1800 states, 1799 states have (on average 2.49082823790995) internal successors, (4481), 1799 states have internal predecessors, (4481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:52,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1800 states to 1800 states and 4481 transitions. [2021-06-05 15:01:52,384 INFO L78 Accepts]: Start accepts. Automaton has 1800 states and 4481 transitions. Word has length 32 [2021-06-05 15:01:52,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:52,384 INFO L482 AbstractCegarLoop]: Abstraction has 1800 states and 4481 transitions. [2021-06-05 15:01:52,384 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:52,384 INFO L276 IsEmpty]: Start isEmpty. Operand 1800 states and 4481 transitions. [2021-06-05 15:01:52,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:01:52,385 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:52,385 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:52,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1685 [2021-06-05 15:01:52,586 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:52,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:52,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1689931970, now seen corresponding path program 124 times [2021-06-05 15:01:52,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:52,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173639649] [2021-06-05 15:01:52,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:52,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:52,789 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:52,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:52,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173639649] [2021-06-05 15:01:52,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173639649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:52,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457236987] [2021-06-05 15:01:52,790 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 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 15:01:52,812 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:01:52,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:52,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:01:52,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:53,203 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:53,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457236987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:53,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:53,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:01:53,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238462400] [2021-06-05 15:01:53,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:01:53,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:53,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:01:53,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:01:53,204 INFO L87 Difference]: Start difference. First operand 1800 states and 4481 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:53,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:53,876 INFO L93 Difference]: Finished difference Result 2102 states and 5216 transitions. [2021-06-05 15:01:53,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:01:53,876 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:01:53,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:53,878 INFO L225 Difference]: With dead ends: 2102 [2021-06-05 15:01:53,878 INFO L226 Difference]: Without dead ends: 2072 [2021-06-05 15:01:53,879 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 941.4ms TimeCoverageRelationStatistics Valid=281, Invalid=1359, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:01:53,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2072 states. [2021-06-05 15:01:53,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2072 to 1816. [2021-06-05 15:01:53,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1816 states, 1815 states have (on average 2.4909090909090907) internal successors, (4521), 1815 states have internal predecessors, (4521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:53,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1816 states to 1816 states and 4521 transitions. [2021-06-05 15:01:53,895 INFO L78 Accepts]: Start accepts. Automaton has 1816 states and 4521 transitions. Word has length 32 [2021-06-05 15:01:53,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:53,895 INFO L482 AbstractCegarLoop]: Abstraction has 1816 states and 4521 transitions. [2021-06-05 15:01:53,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:53,895 INFO L276 IsEmpty]: Start isEmpty. Operand 1816 states and 4521 transitions. [2021-06-05 15:01:53,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:01:53,897 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:53,897 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:54,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1704 [2021-06-05 15:01:54,097 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:54,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:54,097 INFO L82 PathProgramCache]: Analyzing trace with hash -59085894, now seen corresponding path program 125 times [2021-06-05 15:01:54,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:54,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202533265] [2021-06-05 15:01:54,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:54,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:54,293 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:54,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:54,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202533265] [2021-06-05 15:01:54,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202533265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:54,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338634761] [2021-06-05 15:01:54,294 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 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 15:01:54,317 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 15:01:54,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:54,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:01:54,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:54,723 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:54,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338634761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:54,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:54,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:01:54,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681775347] [2021-06-05 15:01:54,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:01:54,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:54,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:01:54,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:01:54,723 INFO L87 Difference]: Start difference. First operand 1816 states and 4521 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:55,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:55,374 INFO L93 Difference]: Finished difference Result 2070 states and 5140 transitions. [2021-06-05 15:01:55,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:01:55,375 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:01:55,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:55,377 INFO L225 Difference]: With dead ends: 2070 [2021-06-05 15:01:55,377 INFO L226 Difference]: Without dead ends: 2040 [2021-06-05 15:01:55,377 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 972.8ms TimeCoverageRelationStatistics Valid=284, Invalid=1438, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 15:01:55,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2040 states. [2021-06-05 15:01:55,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2040 to 1840. [2021-06-05 15:01:55,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1840 states, 1839 states have (on average 2.4910277324632952) internal successors, (4581), 1839 states have internal predecessors, (4581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:55,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1840 states to 1840 states and 4581 transitions. [2021-06-05 15:01:55,393 INFO L78 Accepts]: Start accepts. Automaton has 1840 states and 4581 transitions. Word has length 32 [2021-06-05 15:01:55,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:55,393 INFO L482 AbstractCegarLoop]: Abstraction has 1840 states and 4581 transitions. [2021-06-05 15:01:55,393 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:55,393 INFO L276 IsEmpty]: Start isEmpty. Operand 1840 states and 4581 transitions. [2021-06-05 15:01:55,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:01:55,395 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:55,395 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:55,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1722 [2021-06-05 15:01:55,595 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:55,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:55,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1216056506, now seen corresponding path program 126 times [2021-06-05 15:01:55,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:55,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447481262] [2021-06-05 15:01:55,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:55,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:55,799 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:55,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:55,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447481262] [2021-06-05 15:01:55,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447481262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:55,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569045598] [2021-06-05 15:01:55,799 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 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 15:01:55,822 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 15:01:55,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:55,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:01:55,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:56,243 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:56,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569045598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:56,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:56,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:01:56,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429708209] [2021-06-05 15:01:56,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:01:56,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:56,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:01:56,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:01:56,244 INFO L87 Difference]: Start difference. First operand 1840 states and 4581 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:56,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:56,935 INFO L93 Difference]: Finished difference Result 2150 states and 5328 transitions. [2021-06-05 15:01:56,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:01:56,936 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:01:56,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:56,938 INFO L225 Difference]: With dead ends: 2150 [2021-06-05 15:01:56,938 INFO L226 Difference]: Without dead ends: 2104 [2021-06-05 15:01:56,938 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 1053.5ms TimeCoverageRelationStatistics Valid=268, Invalid=1372, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:01:56,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2104 states. [2021-06-05 15:01:56,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2104 to 1864. [2021-06-05 15:01:56,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1864 states, 1863 states have (on average 2.4911433172302737) internal successors, (4641), 1863 states have internal predecessors, (4641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:56,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1864 states to 1864 states and 4641 transitions. [2021-06-05 15:01:56,955 INFO L78 Accepts]: Start accepts. Automaton has 1864 states and 4641 transitions. Word has length 32 [2021-06-05 15:01:56,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:56,955 INFO L482 AbstractCegarLoop]: Abstraction has 1864 states and 4641 transitions. [2021-06-05 15:01:56,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:56,955 INFO L276 IsEmpty]: Start isEmpty. Operand 1864 states and 4641 transitions. [2021-06-05 15:01:56,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:01:56,956 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:56,956 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:57,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1748,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:57,157 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:57,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:57,157 INFO L82 PathProgramCache]: Analyzing trace with hash 690028670, now seen corresponding path program 127 times [2021-06-05 15:01:57,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:57,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085564161] [2021-06-05 15:01:57,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:57,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:57,338 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:57,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:57,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085564161] [2021-06-05 15:01:57,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085564161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:57,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793125334] [2021-06-05 15:01:57,339 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 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 15:01:57,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:57,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:01:57,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:57,668 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:57,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793125334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:57,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:57,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:01:57,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992466836] [2021-06-05 15:01:57,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:01:57,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:57,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:01:57,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:01:57,669 INFO L87 Difference]: Start difference. First operand 1864 states and 4641 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:58,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:58,065 INFO L93 Difference]: Finished difference Result 2022 states and 5012 transitions. [2021-06-05 15:01:58,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:01:58,065 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:01:58,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:58,067 INFO L225 Difference]: With dead ends: 2022 [2021-06-05 15:01:58,067 INFO L226 Difference]: Without dead ends: 1984 [2021-06-05 15:01:58,067 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 575.9ms TimeCoverageRelationStatistics Valid=211, Invalid=1121, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:01:58,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1984 states. [2021-06-05 15:01:58,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1984 to 1880. [2021-06-05 15:01:58,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1880 states, 1879 states have (on average 2.491218733368813) internal successors, (4681), 1879 states have internal predecessors, (4681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:58,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1880 states to 1880 states and 4681 transitions. [2021-06-05 15:01:58,082 INFO L78 Accepts]: Start accepts. Automaton has 1880 states and 4681 transitions. Word has length 32 [2021-06-05 15:01:58,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:58,082 INFO L482 AbstractCegarLoop]: Abstraction has 1880 states and 4681 transitions. [2021-06-05 15:01:58,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:58,083 INFO L276 IsEmpty]: Start isEmpty. Operand 1880 states and 4681 transitions. [2021-06-05 15:01:58,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:01:58,084 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:58,084 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:58,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1770 [2021-06-05 15:01:58,285 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:58,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:58,285 INFO L82 PathProgramCache]: Analyzing trace with hash 877718970, now seen corresponding path program 128 times [2021-06-05 15:01:58,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:58,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940232900] [2021-06-05 15:01:58,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:58,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:58,458 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:58,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:58,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940232900] [2021-06-05 15:01:58,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940232900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:58,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952556077] [2021-06-05 15:01:58,459 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 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 15:01:58,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:01:58,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:58,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:01:58,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:58,890 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:58,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952556077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:58,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:58,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:01:58,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602600524] [2021-06-05 15:01:58,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:01:58,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:58,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:01:58,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:01:58,891 INFO L87 Difference]: Start difference. First operand 1880 states and 4681 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:59,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:59,442 INFO L93 Difference]: Finished difference Result 2126 states and 5272 transitions. [2021-06-05 15:01:59,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:01:59,443 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:01:59,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:59,445 INFO L225 Difference]: With dead ends: 2126 [2021-06-05 15:01:59,445 INFO L226 Difference]: Without dead ends: 2080 [2021-06-05 15:01:59,445 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 842.9ms TimeCoverageRelationStatistics Valid=253, Invalid=1307, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:01:59,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2080 states. [2021-06-05 15:01:59,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2080 to 1920. [2021-06-05 15:01:59,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1920 states, 1919 states have (on average 2.4914017717561228) internal successors, (4781), 1919 states have internal predecessors, (4781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:59,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1920 states to 1920 states and 4781 transitions. [2021-06-05 15:01:59,463 INFO L78 Accepts]: Start accepts. Automaton has 1920 states and 4781 transitions. Word has length 32 [2021-06-05 15:01:59,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:59,463 INFO L482 AbstractCegarLoop]: Abstraction has 1920 states and 4781 transitions. [2021-06-05 15:01:59,463 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:59,463 INFO L276 IsEmpty]: Start isEmpty. Operand 1920 states and 4781 transitions. [2021-06-05 15:01:59,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:01:59,465 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:59,465 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:59,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1784 [2021-06-05 15:01:59,665 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:59,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:59,666 INFO L82 PathProgramCache]: Analyzing trace with hash -587357826, now seen corresponding path program 129 times [2021-06-05 15:01:59,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:59,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568712135] [2021-06-05 15:01:59,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:59,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:59,830 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:59,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:59,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568712135] [2021-06-05 15:01:59,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568712135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:59,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918215228] [2021-06-05 15:01:59,830 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 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 15:01:59,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 15:01:59,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:59,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 15:01:59,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:00,172 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:00,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918215228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:00,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:00,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:02:00,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781046816] [2021-06-05 15:02:00,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:02:00,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:00,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:02:00,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:02:00,173 INFO L87 Difference]: Start difference. First operand 1920 states and 4781 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:00,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:00,741 INFO L93 Difference]: Finished difference Result 2078 states and 5152 transitions. [2021-06-05 15:02:00,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:02:00,741 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:02:00,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:00,743 INFO L225 Difference]: With dead ends: 2078 [2021-06-05 15:02:00,743 INFO L226 Difference]: Without dead ends: 2040 [2021-06-05 15:02:00,743 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 751.0ms TimeCoverageRelationStatistics Valid=355, Invalid=1537, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 15:02:00,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2040 states. [2021-06-05 15:02:00,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2040 to 1912. [2021-06-05 15:02:00,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1912 states, 1911 states have (on average 2.491365777080063) internal successors, (4761), 1911 states have internal predecessors, (4761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:00,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1912 states to 1912 states and 4761 transitions. [2021-06-05 15:02:00,758 INFO L78 Accepts]: Start accepts. Automaton has 1912 states and 4761 transitions. Word has length 32 [2021-06-05 15:02:00,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:00,758 INFO L482 AbstractCegarLoop]: Abstraction has 1912 states and 4761 transitions. [2021-06-05 15:02:00,758 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:00,758 INFO L276 IsEmpty]: Start isEmpty. Operand 1912 states and 4761 transitions. [2021-06-05 15:02:00,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:02:00,759 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:00,759 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:00,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1801 [2021-06-05 15:02:00,960 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:00,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:00,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1197117250, now seen corresponding path program 130 times [2021-06-05 15:02:00,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:00,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138698384] [2021-06-05 15:02:00,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:00,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:01,186 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:01,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:01,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138698384] [2021-06-05 15:02:01,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138698384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:01,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964902195] [2021-06-05 15:02:01,187 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 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 15:02:01,209 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:02:01,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:01,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:02:01,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:01,539 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:01,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964902195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:01,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:01,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:02:01,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692728880] [2021-06-05 15:02:01,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:02:01,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:01,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:02:01,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:02:01,540 INFO L87 Difference]: Start difference. First operand 1912 states and 4761 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:02,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:02,068 INFO L93 Difference]: Finished difference Result 2070 states and 5132 transitions. [2021-06-05 15:02:02,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:02:02,068 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:02:02,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:02,070 INFO L225 Difference]: With dead ends: 2070 [2021-06-05 15:02:02,070 INFO L226 Difference]: Without dead ends: 2032 [2021-06-05 15:02:02,070 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 809.6ms TimeCoverageRelationStatistics Valid=319, Invalid=1487, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:02:02,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2032 states. [2021-06-05 15:02:02,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2032 to 1912. [2021-06-05 15:02:02,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1912 states, 1911 states have (on average 2.491365777080063) internal successors, (4761), 1911 states have internal predecessors, (4761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:02,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1912 states to 1912 states and 4761 transitions. [2021-06-05 15:02:02,085 INFO L78 Accepts]: Start accepts. Automaton has 1912 states and 4761 transitions. Word has length 32 [2021-06-05 15:02:02,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:02,085 INFO L482 AbstractCegarLoop]: Abstraction has 1912 states and 4761 transitions. [2021-06-05 15:02:02,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:02,085 INFO L276 IsEmpty]: Start isEmpty. Operand 1912 states and 4761 transitions. [2021-06-05 15:02:02,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:02:02,087 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:02,087 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:02,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1819 [2021-06-05 15:02:02,287 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:02,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:02,287 INFO L82 PathProgramCache]: Analyzing trace with hash 991178818, now seen corresponding path program 131 times [2021-06-05 15:02:02,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:02,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523008072] [2021-06-05 15:02:02,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:02,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:02,507 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:02,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:02,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523008072] [2021-06-05 15:02:02,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523008072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:02,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282328684] [2021-06-05 15:02:02,508 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 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 15:02:02,531 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 15:02:02,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:02,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:02:02,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:02,872 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:02,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282328684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:02,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:02,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:02:02,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293056] [2021-06-05 15:02:02,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:02:02,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:02,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:02:02,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:02:02,873 INFO L87 Difference]: Start difference. First operand 1912 states and 4761 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:03,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:03,447 INFO L93 Difference]: Finished difference Result 2142 states and 5316 transitions. [2021-06-05 15:02:03,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:02:03,447 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:02:03,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:03,449 INFO L225 Difference]: With dead ends: 2142 [2021-06-05 15:02:03,449 INFO L226 Difference]: Without dead ends: 2112 [2021-06-05 15:02:03,449 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 867.7ms TimeCoverageRelationStatistics Valid=283, Invalid=1277, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:02:03,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2112 states. [2021-06-05 15:02:03,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2112 to 1928. [2021-06-05 15:02:03,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1928 states, 1927 states have (on average 2.4914374675661652) internal successors, (4801), 1927 states have internal predecessors, (4801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:03,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1928 states to 1928 states and 4801 transitions. [2021-06-05 15:02:03,465 INFO L78 Accepts]: Start accepts. Automaton has 1928 states and 4801 transitions. Word has length 32 [2021-06-05 15:02:03,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:03,465 INFO L482 AbstractCegarLoop]: Abstraction has 1928 states and 4801 transitions. [2021-06-05 15:02:03,465 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:03,465 INFO L276 IsEmpty]: Start isEmpty. Operand 1928 states and 4801 transitions. [2021-06-05 15:02:03,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:02:03,467 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:03,467 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:03,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1832 [2021-06-05 15:02:03,667 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:03,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:03,668 INFO L82 PathProgramCache]: Analyzing trace with hash 652841282, now seen corresponding path program 132 times [2021-06-05 15:02:03,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:03,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078911372] [2021-06-05 15:02:03,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:03,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:03,859 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:03,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:03,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078911372] [2021-06-05 15:02:03,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078911372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:03,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101351248] [2021-06-05 15:02:03,859 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 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 15:02:03,884 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 15:02:03,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:03,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:02:03,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:04,222 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:04,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101351248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:04,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:04,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:02:04,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470119115] [2021-06-05 15:02:04,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:02:04,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:04,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:02:04,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:02:04,223 INFO L87 Difference]: Start difference. First operand 1928 states and 4801 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:04,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:04,790 INFO L93 Difference]: Finished difference Result 2142 states and 5316 transitions. [2021-06-05 15:02:04,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:02:04,790 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:02:04,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:04,792 INFO L225 Difference]: With dead ends: 2142 [2021-06-05 15:02:04,792 INFO L226 Difference]: Without dead ends: 2112 [2021-06-05 15:02:04,793 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 830.2ms TimeCoverageRelationStatistics Valid=277, Invalid=1205, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:02:04,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2112 states. [2021-06-05 15:02:04,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2112 to 1944. [2021-06-05 15:02:04,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1944 states, 1943 states have (on average 2.4915079773546065) internal successors, (4841), 1943 states have internal predecessors, (4841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:04,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1944 states to 1944 states and 4841 transitions. [2021-06-05 15:02:04,808 INFO L78 Accepts]: Start accepts. Automaton has 1944 states and 4841 transitions. Word has length 32 [2021-06-05 15:02:04,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:04,808 INFO L482 AbstractCegarLoop]: Abstraction has 1944 states and 4841 transitions. [2021-06-05 15:02:04,808 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:04,808 INFO L276 IsEmpty]: Start isEmpty. Operand 1944 states and 4841 transitions. [2021-06-05 15:02:04,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:02:04,810 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:04,810 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:05,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1848,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:05,010 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:05,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:05,011 INFO L82 PathProgramCache]: Analyzing trace with hash 634593150, now seen corresponding path program 133 times [2021-06-05 15:02:05,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:05,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8404898] [2021-06-05 15:02:05,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:05,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:05,195 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:05,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:05,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8404898] [2021-06-05 15:02:05,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8404898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:05,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317524821] [2021-06-05 15:02:05,195 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 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 15:02:05,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:05,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 15:02:05,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:05,497 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:05,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317524821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:05,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:05,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:02:05,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61051596] [2021-06-05 15:02:05,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:02:05,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:05,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:02:05,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:02:05,498 INFO L87 Difference]: Start difference. First operand 1944 states and 4841 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:05,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:05,964 INFO L93 Difference]: Finished difference Result 2238 states and 5552 transitions. [2021-06-05 15:02:05,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:02:05,964 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:02:05,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:05,966 INFO L225 Difference]: With dead ends: 2238 [2021-06-05 15:02:05,966 INFO L226 Difference]: Without dead ends: 2200 [2021-06-05 15:02:05,967 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 680.3ms TimeCoverageRelationStatistics Valid=242, Invalid=1318, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:02:05,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2200 states. [2021-06-05 15:02:05,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2200 to 1976. [2021-06-05 15:02:05,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1976 states, 1975 states have (on average 2.4916455696202533) internal successors, (4921), 1975 states have internal predecessors, (4921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:05,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1976 states to 1976 states and 4921 transitions. [2021-06-05 15:02:05,985 INFO L78 Accepts]: Start accepts. Automaton has 1976 states and 4921 transitions. Word has length 32 [2021-06-05 15:02:05,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:05,985 INFO L482 AbstractCegarLoop]: Abstraction has 1976 states and 4921 transitions. [2021-06-05 15:02:05,986 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:05,986 INFO L276 IsEmpty]: Start isEmpty. Operand 1976 states and 4921 transitions. [2021-06-05 15:02:05,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:02:05,987 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:05,987 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:06,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1866 [2021-06-05 15:02:06,187 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:06,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:06,188 INFO L82 PathProgramCache]: Analyzing trace with hash 343700418, now seen corresponding path program 134 times [2021-06-05 15:02:06,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:06,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170426342] [2021-06-05 15:02:06,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:06,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:06,382 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:06,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:06,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170426342] [2021-06-05 15:02:06,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170426342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:06,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605793932] [2021-06-05 15:02:06,383 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 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 15:02:06,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:02:06,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:06,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:02:06,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:06,727 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:06,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605793932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:06,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:06,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:02:06,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606557205] [2021-06-05 15:02:06,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:02:06,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:06,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:02:06,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:02:06,728 INFO L87 Difference]: Start difference. First operand 1976 states and 4921 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:07,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:07,524 INFO L93 Difference]: Finished difference Result 2278 states and 5656 transitions. [2021-06-05 15:02:07,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 15:02:07,524 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:02:07,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:07,526 INFO L225 Difference]: With dead ends: 2278 [2021-06-05 15:02:07,526 INFO L226 Difference]: Without dead ends: 2248 [2021-06-05 15:02:07,527 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 1020.0ms TimeCoverageRelationStatistics Valid=405, Invalid=1851, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 15:02:07,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2248 states. [2021-06-05 15:02:07,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2248 to 1992. [2021-06-05 15:02:07,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1992 states, 1991 states have (on average 2.4917127071823204) internal successors, (4961), 1991 states have internal predecessors, (4961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:07,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1992 states to 1992 states and 4961 transitions. [2021-06-05 15:02:07,544 INFO L78 Accepts]: Start accepts. Automaton has 1992 states and 4961 transitions. Word has length 32 [2021-06-05 15:02:07,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:07,544 INFO L482 AbstractCegarLoop]: Abstraction has 1992 states and 4961 transitions. [2021-06-05 15:02:07,545 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:07,545 INFO L276 IsEmpty]: Start isEmpty. Operand 1992 states and 4961 transitions. [2021-06-05 15:02:07,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:02:07,546 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:07,546 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:07,761 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1876 [2021-06-05 15:02:07,761 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:07,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:07,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1571398014, now seen corresponding path program 135 times [2021-06-05 15:02:07,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:07,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112971407] [2021-06-05 15:02:07,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:07,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:07,996 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:07,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:07,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112971407] [2021-06-05 15:02:07,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112971407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:07,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254927659] [2021-06-05 15:02:07,996 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 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 15:02:08,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 15:02:08,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:08,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:02:08,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:08,347 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:08,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254927659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:08,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:08,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:02:08,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171007332] [2021-06-05 15:02:08,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:02:08,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:08,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:02:08,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:02:08,348 INFO L87 Difference]: Start difference. First operand 1992 states and 4961 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:08,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:08,947 INFO L93 Difference]: Finished difference Result 2174 states and 5392 transitions. [2021-06-05 15:02:08,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:02:08,947 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:02:08,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:08,949 INFO L225 Difference]: With dead ends: 2174 [2021-06-05 15:02:08,949 INFO L226 Difference]: Without dead ends: 2136 [2021-06-05 15:02:08,949 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 907.4ms TimeCoverageRelationStatistics Valid=215, Invalid=1267, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:02:08,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2136 states. [2021-06-05 15:02:08,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2136 to 2008. [2021-06-05 15:02:08,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2008 states, 2007 states have (on average 2.491778774289985) internal successors, (5001), 2007 states have internal predecessors, (5001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:08,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2008 states to 2008 states and 5001 transitions. [2021-06-05 15:02:08,965 INFO L78 Accepts]: Start accepts. Automaton has 2008 states and 5001 transitions. Word has length 32 [2021-06-05 15:02:08,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:08,966 INFO L482 AbstractCegarLoop]: Abstraction has 2008 states and 5001 transitions. [2021-06-05 15:02:08,966 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:08,966 INFO L276 IsEmpty]: Start isEmpty. Operand 2008 states and 5001 transitions. [2021-06-05 15:02:08,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:02:08,967 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:08,967 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:09,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1891 [2021-06-05 15:02:09,169 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:09,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:09,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1759088314, now seen corresponding path program 136 times [2021-06-05 15:02:09,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:09,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346848249] [2021-06-05 15:02:09,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:09,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:09,353 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:09,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:09,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346848249] [2021-06-05 15:02:09,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346848249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:09,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629523662] [2021-06-05 15:02:09,354 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 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 15:02:09,383 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:02:09,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:09,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:02:09,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:09,831 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:09,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629523662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:09,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:09,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:02:09,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332528488] [2021-06-05 15:02:09,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:02:09,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:09,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:02:09,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:02:09,832 INFO L87 Difference]: Start difference. First operand 2008 states and 5001 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:10,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:10,439 INFO L93 Difference]: Finished difference Result 2230 states and 5532 transitions. [2021-06-05 15:02:10,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:02:10,439 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:02:10,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:10,441 INFO L225 Difference]: With dead ends: 2230 [2021-06-05 15:02:10,441 INFO L226 Difference]: Without dead ends: 2192 [2021-06-05 15:02:10,442 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 877.6ms TimeCoverageRelationStatistics Valid=269, Invalid=1453, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 15:02:10,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2192 states. [2021-06-05 15:02:10,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2192 to 2024. [2021-06-05 15:02:10,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2024 states, 2023 states have (on average 2.4918437963420663) internal successors, (5041), 2023 states have internal predecessors, (5041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:10,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2024 states to 2024 states and 5041 transitions. [2021-06-05 15:02:10,460 INFO L78 Accepts]: Start accepts. Automaton has 2024 states and 5041 transitions. Word has length 32 [2021-06-05 15:02:10,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:10,460 INFO L482 AbstractCegarLoop]: Abstraction has 2024 states and 5041 transitions. [2021-06-05 15:02:10,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:10,461 INFO L276 IsEmpty]: Start isEmpty. Operand 2024 states and 5041 transitions. [2021-06-05 15:02:10,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:02:10,462 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:10,462 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:10,662 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1907 [2021-06-05 15:02:10,662 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:10,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:10,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1039064706, now seen corresponding path program 137 times [2021-06-05 15:02:10,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:10,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708240629] [2021-06-05 15:02:10,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:10,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:10,889 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:10,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:10,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708240629] [2021-06-05 15:02:10,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708240629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:10,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641374407] [2021-06-05 15:02:10,889 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 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 15:02:10,923 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 15:02:10,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:10,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:02:10,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:11,345 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:11,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641374407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:11,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:11,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:02:11,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365553109] [2021-06-05 15:02:11,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:02:11,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:11,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:02:11,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:02:11,346 INFO L87 Difference]: Start difference. First operand 2024 states and 5041 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:11,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:11,953 INFO L93 Difference]: Finished difference Result 2238 states and 5552 transitions. [2021-06-05 15:02:11,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:02:11,954 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:02:11,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:11,956 INFO L225 Difference]: With dead ends: 2238 [2021-06-05 15:02:11,956 INFO L226 Difference]: Without dead ends: 2200 [2021-06-05 15:02:11,956 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 974.1ms TimeCoverageRelationStatistics Valid=223, Invalid=1259, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:02:11,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2200 states. [2021-06-05 15:02:11,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2200 to 2032. [2021-06-05 15:02:11,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2032 states, 2031 states have (on average 2.4918759231905465) internal successors, (5061), 2031 states have internal predecessors, (5061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:11,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2032 states to 2032 states and 5061 transitions. [2021-06-05 15:02:11,973 INFO L78 Accepts]: Start accepts. Automaton has 2032 states and 5061 transitions. Word has length 32 [2021-06-05 15:02:11,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:11,973 INFO L482 AbstractCegarLoop]: Abstraction has 2032 states and 5061 transitions. [2021-06-05 15:02:11,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:11,973 INFO L276 IsEmpty]: Start isEmpty. Operand 2032 states and 5061 transitions. [2021-06-05 15:02:11,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:02:11,974 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:11,974 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:12,174 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1921,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:12,175 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:12,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:12,175 INFO L82 PathProgramCache]: Analyzing trace with hash -851374406, now seen corresponding path program 138 times [2021-06-05 15:02:12,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:12,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691906463] [2021-06-05 15:02:12,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:12,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:12,428 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:12,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:12,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691906463] [2021-06-05 15:02:12,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691906463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:12,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751210471] [2021-06-05 15:02:12,428 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 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 15:02:12,457 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 15:02:12,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:12,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:02:12,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:12,935 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:12,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751210471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:12,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:12,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:02:12,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437362447] [2021-06-05 15:02:12,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:02:12,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:12,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:02:12,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:02:12,936 INFO L87 Difference]: Start difference. First operand 2032 states and 5061 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:13,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:13,692 INFO L93 Difference]: Finished difference Result 2286 states and 5680 transitions. [2021-06-05 15:02:13,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:02:13,693 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:02:13,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:13,694 INFO L225 Difference]: With dead ends: 2286 [2021-06-05 15:02:13,694 INFO L226 Difference]: Without dead ends: 2264 [2021-06-05 15:02:13,694 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 1202.3ms TimeCoverageRelationStatistics Valid=279, Invalid=1361, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:02:13,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2264 states. [2021-06-05 15:02:13,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2264 to 2024. [2021-06-05 15:02:13,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2024 states, 2023 states have (on average 2.4918437963420663) internal successors, (5041), 2023 states have internal predecessors, (5041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:13,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2024 states to 2024 states and 5041 transitions. [2021-06-05 15:02:13,711 INFO L78 Accepts]: Start accepts. Automaton has 2024 states and 5041 transitions. Word has length 32 [2021-06-05 15:02:13,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:13,711 INFO L482 AbstractCegarLoop]: Abstraction has 2024 states and 5041 transitions. [2021-06-05 15:02:13,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:13,711 INFO L276 IsEmpty]: Start isEmpty. Operand 2024 states and 5041 transitions. [2021-06-05 15:02:13,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:02:13,712 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:13,712 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:13,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1938,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:13,913 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:13,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:13,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1377402242, now seen corresponding path program 139 times [2021-06-05 15:02:13,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:13,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618452590] [2021-06-05 15:02:13,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:13,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:14,093 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:14,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:14,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618452590] [2021-06-05 15:02:14,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618452590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:14,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160068948] [2021-06-05 15:02:14,094 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 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 15:02:14,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:14,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:02:14,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:14,496 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:14,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160068948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:14,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:14,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:02:14,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923250151] [2021-06-05 15:02:14,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:02:14,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:14,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:02:14,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:02:14,497 INFO L87 Difference]: Start difference. First operand 2024 states and 5041 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:15,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:15,086 INFO L93 Difference]: Finished difference Result 2174 states and 5392 transitions. [2021-06-05 15:02:15,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 15:02:15,086 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:02:15,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:15,088 INFO L225 Difference]: With dead ends: 2174 [2021-06-05 15:02:15,088 INFO L226 Difference]: Without dead ends: 2136 [2021-06-05 15:02:15,088 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 898.8ms TimeCoverageRelationStatistics Valid=180, Invalid=1080, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:02:15,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2136 states. [2021-06-05 15:02:15,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2136 to 2024. [2021-06-05 15:02:15,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2024 states, 2023 states have (on average 2.4918437963420663) internal successors, (5041), 2023 states have internal predecessors, (5041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:15,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2024 states to 2024 states and 5041 transitions. [2021-06-05 15:02:15,105 INFO L78 Accepts]: Start accepts. Automaton has 2024 states and 5041 transitions. Word has length 32 [2021-06-05 15:02:15,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:15,105 INFO L482 AbstractCegarLoop]: Abstraction has 2024 states and 5041 transitions. [2021-06-05 15:02:15,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:15,105 INFO L276 IsEmpty]: Start isEmpty. Operand 2024 states and 5041 transitions. [2021-06-05 15:02:15,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:02:15,106 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:15,106 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:15,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1959,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:15,307 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:15,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:15,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1189711942, now seen corresponding path program 140 times [2021-06-05 15:02:15,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:15,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862202420] [2021-06-05 15:02:15,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:15,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:15,493 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:15,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:15,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862202420] [2021-06-05 15:02:15,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862202420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:15,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562910706] [2021-06-05 15:02:15,494 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 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 15:02:15,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:02:15,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:15,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:02:15,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:15,958 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:15,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562910706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:15,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:15,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:02:15,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237719132] [2021-06-05 15:02:15,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:02:15,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:15,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:02:15,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:02:15,959 INFO L87 Difference]: Start difference. First operand 2024 states and 5041 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:16,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:16,697 INFO L93 Difference]: Finished difference Result 2286 states and 5676 transitions. [2021-06-05 15:02:16,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:02:16,697 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:02:16,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:16,699 INFO L225 Difference]: With dead ends: 2286 [2021-06-05 15:02:16,699 INFO L226 Difference]: Without dead ends: 2248 [2021-06-05 15:02:16,699 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 1084.5ms TimeCoverageRelationStatistics Valid=254, Invalid=1306, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:02:16,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2248 states. [2021-06-05 15:02:16,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2248 to 2024. [2021-06-05 15:02:16,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2024 states, 2023 states have (on average 2.4918437963420663) internal successors, (5041), 2023 states have internal predecessors, (5041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:16,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2024 states to 2024 states and 5041 transitions. [2021-06-05 15:02:16,719 INFO L78 Accepts]: Start accepts. Automaton has 2024 states and 5041 transitions. Word has length 32 [2021-06-05 15:02:16,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:16,719 INFO L482 AbstractCegarLoop]: Abstraction has 2024 states and 5041 transitions. [2021-06-05 15:02:16,719 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:16,719 INFO L276 IsEmpty]: Start isEmpty. Operand 2024 states and 5041 transitions. [2021-06-05 15:02:16,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:02:16,720 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:16,720 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:16,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1976,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:16,921 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:16,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:16,921 INFO L82 PathProgramCache]: Analyzing trace with hash 85430458, now seen corresponding path program 141 times [2021-06-05 15:02:16,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:16,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25119089] [2021-06-05 15:02:16,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:16,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:17,069 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:17,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:17,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25119089] [2021-06-05 15:02:17,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25119089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:17,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973039896] [2021-06-05 15:02:17,069 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 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 15:02:17,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 15:02:17,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:17,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:02:17,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:17,548 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:17,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973039896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:17,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:17,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:02:17,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390719708] [2021-06-05 15:02:17,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:02:17,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:17,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:02:17,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:02:17,548 INFO L87 Difference]: Start difference. First operand 2024 states and 5041 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:18,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:18,251 INFO L93 Difference]: Finished difference Result 2206 states and 5476 transitions. [2021-06-05 15:02:18,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:02:18,251 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:02:18,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:18,253 INFO L225 Difference]: With dead ends: 2206 [2021-06-05 15:02:18,253 INFO L226 Difference]: Without dead ends: 2176 [2021-06-05 15:02:18,254 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 1010.4ms TimeCoverageRelationStatistics Valid=315, Invalid=1577, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 15:02:18,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2176 states. [2021-06-05 15:02:18,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2176 to 2048. [2021-06-05 15:02:18,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2048 states, 2047 states have (on average 2.4919394235466537) internal successors, (5101), 2047 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 15:02:18,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2048 states to 2048 states and 5101 transitions. [2021-06-05 15:02:18,271 INFO L78 Accepts]: Start accepts. Automaton has 2048 states and 5101 transitions. Word has length 32 [2021-06-05 15:02:18,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:18,271 INFO L482 AbstractCegarLoop]: Abstraction has 2048 states and 5101 transitions. [2021-06-05 15:02:18,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:18,271 INFO L276 IsEmpty]: Start isEmpty. Operand 2048 states and 5101 transitions. [2021-06-05 15:02:18,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:02:18,272 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:18,272 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:18,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1996 [2021-06-05 15:02:18,473 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:18,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:18,473 INFO L82 PathProgramCache]: Analyzing trace with hash -120507974, now seen corresponding path program 142 times [2021-06-05 15:02:18,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:18,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732301498] [2021-06-05 15:02:18,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:18,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:18,670 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:18,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:18,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732301498] [2021-06-05 15:02:18,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732301498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:18,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998095640] [2021-06-05 15:02:18,671 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 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 15:02:18,704 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:02:18,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:18,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:02:18,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:19,110 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:19,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998095640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:19,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:19,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:02:19,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959714997] [2021-06-05 15:02:19,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:02:19,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:19,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:02:19,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:02:19,111 INFO L87 Difference]: Start difference. First operand 2048 states and 5101 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:19,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:19,790 INFO L93 Difference]: Finished difference Result 2278 states and 5660 transitions. [2021-06-05 15:02:19,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:02:19,790 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:02:19,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:19,792 INFO L225 Difference]: With dead ends: 2278 [2021-06-05 15:02:19,792 INFO L226 Difference]: Without dead ends: 2248 [2021-06-05 15:02:19,793 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 1019.8ms TimeCoverageRelationStatistics Valid=338, Invalid=1554, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 15:02:19,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2248 states. [2021-06-05 15:02:19,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2248 to 2056. [2021-06-05 15:02:19,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2056 states, 2055 states have (on average 2.491970802919708) internal successors, (5121), 2055 states have internal predecessors, (5121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:19,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2056 states to 2056 states and 5121 transitions. [2021-06-05 15:02:19,809 INFO L78 Accepts]: Start accepts. Automaton has 2056 states and 5121 transitions. Word has length 32 [2021-06-05 15:02:19,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:19,809 INFO L482 AbstractCegarLoop]: Abstraction has 2056 states and 5121 transitions. [2021-06-05 15:02:19,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:19,810 INFO L276 IsEmpty]: Start isEmpty. Operand 2056 states and 5121 transitions. [2021-06-05 15:02:19,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:02:19,811 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:19,811 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:20,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2013 [2021-06-05 15:02:20,012 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:20,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:20,012 INFO L82 PathProgramCache]: Analyzing trace with hash 67182326, now seen corresponding path program 143 times [2021-06-05 15:02:20,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:20,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934290242] [2021-06-05 15:02:20,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:20,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:20,250 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:20,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:20,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934290242] [2021-06-05 15:02:20,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934290242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:20,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311311909] [2021-06-05 15:02:20,250 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 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 15:02:20,273 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 15:02:20,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:20,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:02:20,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:20,698 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:20,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311311909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:20,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:20,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:02:20,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143660985] [2021-06-05 15:02:20,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:02:20,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:20,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:02:20,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:02:20,699 INFO L87 Difference]: Start difference. First operand 2056 states and 5121 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:21,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:21,337 INFO L93 Difference]: Finished difference Result 2238 states and 5556 transitions. [2021-06-05 15:02:21,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:02:21,338 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:02:21,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:21,340 INFO L225 Difference]: With dead ends: 2238 [2021-06-05 15:02:21,340 INFO L226 Difference]: Without dead ends: 2208 [2021-06-05 15:02:21,340 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 1003.9ms TimeCoverageRelationStatistics Valid=216, Invalid=1266, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:02:21,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2208 states. [2021-06-05 15:02:21,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2208 to 2080. [2021-06-05 15:02:21,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2080 states, 2079 states have (on average 2.492063492063492) internal successors, (5181), 2079 states have internal predecessors, (5181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:21,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2080 states to 2080 states and 5181 transitions. [2021-06-05 15:02:21,356 INFO L78 Accepts]: Start accepts. Automaton has 2080 states and 5181 transitions. Word has length 32 [2021-06-05 15:02:21,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:21,356 INFO L482 AbstractCegarLoop]: Abstraction has 2080 states and 5181 transitions. [2021-06-05 15:02:21,356 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:21,356 INFO L276 IsEmpty]: Start isEmpty. Operand 2080 states and 5181 transitions. [2021-06-05 15:02:21,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:02:21,357 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:21,358 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:21,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2029 [2021-06-05 15:02:21,558 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:21,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:21,558 INFO L82 PathProgramCache]: Analyzing trace with hash 2084499522, now seen corresponding path program 144 times [2021-06-05 15:02:21,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:21,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917297902] [2021-06-05 15:02:21,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:21,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:21,719 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:21,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:21,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917297902] [2021-06-05 15:02:21,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917297902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:21,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591070496] [2021-06-05 15:02:21,719 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 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 15:02:21,743 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 15:02:21,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:21,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 15:02:21,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:21,987 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:21,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591070496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:21,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:21,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:02:21,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661327039] [2021-06-05 15:02:21,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:02:21,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:21,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:02:21,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:02:21,987 INFO L87 Difference]: Start difference. First operand 2080 states and 5181 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:22,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:22,312 INFO L93 Difference]: Finished difference Result 2198 states and 5456 transitions. [2021-06-05 15:02:22,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:02:22,312 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:02:22,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:22,314 INFO L225 Difference]: With dead ends: 2198 [2021-06-05 15:02:22,314 INFO L226 Difference]: Without dead ends: 2176 [2021-06-05 15:02:22,314 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 499.9ms TimeCoverageRelationStatistics Valid=259, Invalid=1147, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:02:22,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2176 states. [2021-06-05 15:02:22,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2176 to 2064. [2021-06-05 15:02:22,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2064 states, 2063 states have (on average 2.49006301502666) internal successors, (5137), 2063 states have internal predecessors, (5137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:22,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2064 states to 2064 states and 5137 transitions. [2021-06-05 15:02:22,332 INFO L78 Accepts]: Start accepts. Automaton has 2064 states and 5137 transitions. Word has length 32 [2021-06-05 15:02:22,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:22,332 INFO L482 AbstractCegarLoop]: Abstraction has 2064 states and 5137 transitions. [2021-06-05 15:02:22,332 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:22,332 INFO L276 IsEmpty]: Start isEmpty. Operand 2064 states and 5137 transitions. [2021-06-05 15:02:22,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:02:22,333 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:22,333 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:22,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2043,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:22,534 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:22,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:22,534 INFO L82 PathProgramCache]: Analyzing trace with hash 619422726, now seen corresponding path program 145 times [2021-06-05 15:02:22,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:22,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257254266] [2021-06-05 15:02:22,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:22,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:22,938 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 7 [2021-06-05 15:02:23,010 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:23,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:23,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257254266] [2021-06-05 15:02:23,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257254266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:23,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244462149] [2021-06-05 15:02:23,010 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 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 15:02:23,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:23,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 15:02:23,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:23,289 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:23,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244462149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:23,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:23,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:02:23,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553388516] [2021-06-05 15:02:23,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:02:23,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:23,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:02:23,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:02:23,290 INFO L87 Difference]: Start difference. First operand 2064 states and 5137 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:23,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:23,662 INFO L93 Difference]: Finished difference Result 2230 states and 5536 transitions. [2021-06-05 15:02:23,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:02:23,662 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:02:23,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:23,663 INFO L225 Difference]: With dead ends: 2230 [2021-06-05 15:02:23,663 INFO L226 Difference]: Without dead ends: 2208 [2021-06-05 15:02:23,663 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 521.8ms TimeCoverageRelationStatistics Valid=286, Invalid=1196, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:02:23,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2208 states. [2021-06-05 15:02:23,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2208 to 2072. [2021-06-05 15:02:23,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2072 states, 2071 states have (on average 2.4901014002897153) internal successors, (5157), 2071 states have internal predecessors, (5157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:23,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2072 states to 2072 states and 5157 transitions. [2021-06-05 15:02:23,679 INFO L78 Accepts]: Start accepts. Automaton has 2072 states and 5157 transitions. Word has length 32 [2021-06-05 15:02:23,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:23,680 INFO L482 AbstractCegarLoop]: Abstraction has 2072 states and 5157 transitions. [2021-06-05 15:02:23,680 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:23,680 INFO L276 IsEmpty]: Start isEmpty. Operand 2072 states and 5157 transitions. [2021-06-05 15:02:23,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:02:23,681 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:23,681 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:23,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2059,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:23,882 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:23,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:23,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1540223554, now seen corresponding path program 146 times [2021-06-05 15:02:23,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:23,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834874012] [2021-06-05 15:02:23,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:23,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:24,214 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:24,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:24,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834874012] [2021-06-05 15:02:24,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834874012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:24,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473892556] [2021-06-05 15:02:24,214 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 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 15:02:24,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:02:24,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:24,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:02:24,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:24,573 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:24,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473892556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:24,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:24,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:02:24,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601605926] [2021-06-05 15:02:24,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:02:24,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:24,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:02:24,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:02:24,579 INFO L87 Difference]: Start difference. First operand 2072 states and 5157 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:25,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:25,095 INFO L93 Difference]: Finished difference Result 2246 states and 5572 transitions. [2021-06-05 15:02:25,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:02:25,095 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:02:25,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:25,097 INFO L225 Difference]: With dead ends: 2246 [2021-06-05 15:02:25,097 INFO L226 Difference]: Without dead ends: 2216 [2021-06-05 15:02:25,097 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 796.6ms TimeCoverageRelationStatistics Valid=286, Invalid=1196, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:02:25,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2216 states. [2021-06-05 15:02:25,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2216 to 2072. [2021-06-05 15:02:25,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2072 states, 2071 states have (on average 2.4901014002897153) internal successors, (5157), 2071 states have internal predecessors, (5157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:25,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2072 states to 2072 states and 5157 transitions. [2021-06-05 15:02:25,116 INFO L78 Accepts]: Start accepts. Automaton has 2072 states and 5157 transitions. Word has length 32 [2021-06-05 15:02:25,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:25,116 INFO L482 AbstractCegarLoop]: Abstraction has 2072 states and 5157 transitions. [2021-06-05 15:02:25,116 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:25,116 INFO L276 IsEmpty]: Start isEmpty. Operand 2072 states and 5157 transitions. [2021-06-05 15:02:25,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:02:25,117 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:25,117 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:25,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2071 [2021-06-05 15:02:25,318 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:25,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:25,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1737475334, now seen corresponding path program 147 times [2021-06-05 15:02:25,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:25,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466440625] [2021-06-05 15:02:25,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:25,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:26,919 WARN L205 SmtUtils]: Spent 1.52 s on a formula simplification. DAG size of input: 56 DAG size of output: 7 [2021-06-05 15:02:31,017 WARN L205 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 69 DAG size of output: 12 [2021-06-05 15:02:36,458 WARN L205 SmtUtils]: Spent 5.43 s on a formula simplification. DAG size of input: 80 DAG size of output: 20 [2021-06-05 15:02:36,768 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 27 [2021-06-05 15:02:36,854 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:36,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:36,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466440625] [2021-06-05 15:02:36,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466440625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:36,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162582537] [2021-06-05 15:02:36,855 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 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 15:02:36,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 15:02:36,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:36,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:02:36,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:37,187 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:37,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162582537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:37,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:37,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:02:37,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483111357] [2021-06-05 15:02:37,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:02:37,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:37,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:02:37,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:02:37,188 INFO L87 Difference]: Start difference. First operand 2072 states and 5157 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:37,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:37,928 INFO L93 Difference]: Finished difference Result 2294 states and 5692 transitions. [2021-06-05 15:02:37,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:02:37,928 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:02:37,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:37,931 INFO L225 Difference]: With dead ends: 2294 [2021-06-05 15:02:37,931 INFO L226 Difference]: Without dead ends: 2264 [2021-06-05 15:02:37,931 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 944.9ms TimeCoverageRelationStatistics Valid=372, Invalid=1608, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 15:02:37,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2264 states. [2021-06-05 15:02:37,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2264 to 2096. [2021-06-05 15:02:37,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2096 states, 2095 states have (on average 2.490214797136038) internal successors, (5217), 2095 states have internal predecessors, (5217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:37,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2096 states to 2096 states and 5217 transitions. [2021-06-05 15:02:37,949 INFO L78 Accepts]: Start accepts. Automaton has 2096 states and 5217 transitions. Word has length 32 [2021-06-05 15:02:37,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:37,949 INFO L482 AbstractCegarLoop]: Abstraction has 2096 states and 5217 transitions. [2021-06-05 15:02:37,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:37,949 INFO L276 IsEmpty]: Start isEmpty. Operand 2096 states and 5217 transitions. [2021-06-05 15:02:37,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:02:37,951 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:37,951 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:38,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2092,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:38,151 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:38,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:38,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1497849474, now seen corresponding path program 148 times [2021-06-05 15:02:38,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:38,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314738199] [2021-06-05 15:02:38,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:38,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:38,336 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:38,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:38,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314738199] [2021-06-05 15:02:38,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314738199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:38,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168222953] [2021-06-05 15:02:38,336 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 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 15:02:38,359 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:02:38,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:38,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:02:38,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:38,740 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:38,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168222953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:38,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:38,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:02:38,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580684442] [2021-06-05 15:02:38,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:02:38,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:38,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:02:38,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:02:38,741 INFO L87 Difference]: Start difference. First operand 2096 states and 5217 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:39,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:39,272 INFO L93 Difference]: Finished difference Result 2406 states and 5972 transitions. [2021-06-05 15:02:39,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:02:39,272 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:02:39,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:39,274 INFO L225 Difference]: With dead ends: 2406 [2021-06-05 15:02:39,274 INFO L226 Difference]: Without dead ends: 2368 [2021-06-05 15:02:39,274 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 836.2ms TimeCoverageRelationStatistics Valid=222, Invalid=1260, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:02:39,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2368 states. [2021-06-05 15:02:39,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2368 to 2080. [2021-06-05 15:02:39,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2080 states, 2079 states have (on average 2.49013949013949) internal successors, (5177), 2079 states have internal predecessors, (5177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:39,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2080 states to 2080 states and 5177 transitions. [2021-06-05 15:02:39,292 INFO L78 Accepts]: Start accepts. Automaton has 2080 states and 5177 transitions. Word has length 32 [2021-06-05 15:02:39,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:39,292 INFO L482 AbstractCegarLoop]: Abstraction has 2080 states and 5177 transitions. [2021-06-05 15:02:39,292 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:39,292 INFO L276 IsEmpty]: Start isEmpty. Operand 2080 states and 5177 transitions. [2021-06-05 15:02:39,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:02:39,293 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:39,293 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:39,494 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2109,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:39,494 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:39,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:39,494 INFO L82 PathProgramCache]: Analyzing trace with hash -1310159174, now seen corresponding path program 149 times [2021-06-05 15:02:39,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:39,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979086221] [2021-06-05 15:02:39,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:39,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:39,670 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:39,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:39,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979086221] [2021-06-05 15:02:39,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979086221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:39,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883250557] [2021-06-05 15:02:39,671 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 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 15:02:39,695 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 15:02:39,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:39,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:02:39,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:40,119 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:40,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883250557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:40,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:40,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:02:40,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385315821] [2021-06-05 15:02:40,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:02:40,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:40,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:02:40,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:02:40,120 INFO L87 Difference]: Start difference. First operand 2080 states and 5177 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:40,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:40,794 INFO L93 Difference]: Finished difference Result 2414 states and 5996 transitions. [2021-06-05 15:02:40,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:02:40,795 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:02:40,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:40,797 INFO L225 Difference]: With dead ends: 2414 [2021-06-05 15:02:40,797 INFO L226 Difference]: Without dead ends: 2384 [2021-06-05 15:02:40,797 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 1019.7ms TimeCoverageRelationStatistics Valid=284, Invalid=1438, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 15:02:40,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2384 states. [2021-06-05 15:02:40,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2384 to 2080. [2021-06-05 15:02:40,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2080 states, 2079 states have (on average 2.49013949013949) internal successors, (5177), 2079 states have internal predecessors, (5177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:40,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2080 states to 2080 states and 5177 transitions. [2021-06-05 15:02:40,816 INFO L78 Accepts]: Start accepts. Automaton has 2080 states and 5177 transitions. Word has length 32 [2021-06-05 15:02:40,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:40,816 INFO L482 AbstractCegarLoop]: Abstraction has 2080 states and 5177 transitions. [2021-06-05 15:02:40,816 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:40,816 INFO L276 IsEmpty]: Start isEmpty. Operand 2080 states and 5177 transitions. [2021-06-05 15:02:40,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:02:40,817 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:40,817 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:41,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2133 [2021-06-05 15:02:41,018 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:41,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:41,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1836187010, now seen corresponding path program 150 times [2021-06-05 15:02:41,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:41,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844594236] [2021-06-05 15:02:41,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:41,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:41,184 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:41,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:41,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844594236] [2021-06-05 15:02:41,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844594236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:41,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540821385] [2021-06-05 15:02:41,184 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 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 15:02:41,208 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 15:02:41,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:41,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:02:41,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:41,511 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:41,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540821385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:41,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:41,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:02:41,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981522067] [2021-06-05 15:02:41,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:02:41,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:41,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:02:41,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:02:41,511 INFO L87 Difference]: Start difference. First operand 2080 states and 5177 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:42,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:42,112 INFO L93 Difference]: Finished difference Result 2214 states and 5488 transitions. [2021-06-05 15:02:42,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:02:42,112 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:02:42,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:42,114 INFO L225 Difference]: With dead ends: 2214 [2021-06-05 15:02:42,114 INFO L226 Difference]: Without dead ends: 2176 [2021-06-05 15:02:42,115 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 689.2ms TimeCoverageRelationStatistics Valid=264, Invalid=1458, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 15:02:42,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2176 states. [2021-06-05 15:02:42,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2176 to 2096. [2021-06-05 15:02:42,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2096 states, 2095 states have (on average 2.490214797136038) internal successors, (5217), 2095 states have internal predecessors, (5217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:42,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2096 states to 2096 states and 5217 transitions. [2021-06-05 15:02:42,132 INFO L78 Accepts]: Start accepts. Automaton has 2096 states and 5217 transitions. Word has length 32 [2021-06-05 15:02:42,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:42,132 INFO L482 AbstractCegarLoop]: Abstraction has 2096 states and 5217 transitions. [2021-06-05 15:02:42,133 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:42,133 INFO L276 IsEmpty]: Start isEmpty. Operand 2096 states and 5217 transitions. [2021-06-05 15:02:42,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:02:42,134 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:42,134 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:42,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2157 [2021-06-05 15:02:42,335 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:42,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:42,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1648496710, now seen corresponding path program 151 times [2021-06-05 15:02:42,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:42,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186179137] [2021-06-05 15:02:42,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:42,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:42,465 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:42,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:42,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186179137] [2021-06-05 15:02:42,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186179137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:42,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925037598] [2021-06-05 15:02:42,466 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 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 15:02:42,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:42,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:02:42,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:42,897 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:42,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925037598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:42,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:42,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:02:42,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513035160] [2021-06-05 15:02:42,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:02:42,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:42,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:02:42,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:02:42,898 INFO L87 Difference]: Start difference. First operand 2096 states and 5217 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:43,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:43,468 INFO L93 Difference]: Finished difference Result 2366 states and 5864 transitions. [2021-06-05 15:02:43,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:02:43,468 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:02:43,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:43,470 INFO L225 Difference]: With dead ends: 2366 [2021-06-05 15:02:43,470 INFO L226 Difference]: Without dead ends: 2320 [2021-06-05 15:02:43,470 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 767.4ms TimeCoverageRelationStatistics Valid=259, Invalid=1301, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:02:43,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2320 states. [2021-06-05 15:02:43,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2320 to 2096. [2021-06-05 15:02:43,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2096 states, 2095 states have (on average 2.490214797136038) internal successors, (5217), 2095 states have internal predecessors, (5217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:43,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2096 states to 2096 states and 5217 transitions. [2021-06-05 15:02:43,488 INFO L78 Accepts]: Start accepts. Automaton has 2096 states and 5217 transitions. Word has length 32 [2021-06-05 15:02:43,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:43,489 INFO L482 AbstractCegarLoop]: Abstraction has 2096 states and 5217 transitions. [2021-06-05 15:02:43,489 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:43,489 INFO L276 IsEmpty]: Start isEmpty. Operand 2096 states and 5217 transitions. [2021-06-05 15:02:43,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:02:43,490 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:43,490 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:43,690 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2175,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:43,691 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:43,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:43,691 INFO L82 PathProgramCache]: Analyzing trace with hash 54255998, now seen corresponding path program 152 times [2021-06-05 15:02:43,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:43,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520521173] [2021-06-05 15:02:43,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:43,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:43,941 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:43,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:43,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520521173] [2021-06-05 15:02:43,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520521173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:43,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042011352] [2021-06-05 15:02:43,941 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 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 15:02:43,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:02:43,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:43,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:02:43,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:44,471 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:44,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042011352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:44,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:44,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:02:44,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565971463] [2021-06-05 15:02:44,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:02:44,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:44,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:02:44,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:02:44,472 INFO L87 Difference]: Start difference. First operand 2096 states and 5217 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:45,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:45,130 INFO L93 Difference]: Finished difference Result 2278 states and 5652 transitions. [2021-06-05 15:02:45,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:02:45,130 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:02:45,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:45,132 INFO L225 Difference]: With dead ends: 2278 [2021-06-05 15:02:45,132 INFO L226 Difference]: Without dead ends: 2248 [2021-06-05 15:02:45,133 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 1130.0ms TimeCoverageRelationStatistics Valid=225, Invalid=1257, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:02:45,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2248 states. [2021-06-05 15:02:45,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2248 to 2096. [2021-06-05 15:02:45,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2096 states, 2095 states have (on average 2.490214797136038) internal successors, (5217), 2095 states have internal predecessors, (5217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:45,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2096 states to 2096 states and 5217 transitions. [2021-06-05 15:02:45,151 INFO L78 Accepts]: Start accepts. Automaton has 2096 states and 5217 transitions. Word has length 32 [2021-06-05 15:02:45,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:45,151 INFO L482 AbstractCegarLoop]: Abstraction has 2096 states and 5217 transitions. [2021-06-05 15:02:45,151 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:45,151 INFO L276 IsEmpty]: Start isEmpty. Operand 2096 states and 5217 transitions. [2021-06-05 15:02:45,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:02:45,152 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:45,152 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:45,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2192 [2021-06-05 15:02:45,353 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:45,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:45,353 INFO L82 PathProgramCache]: Analyzing trace with hash 36007866, now seen corresponding path program 153 times [2021-06-05 15:02:45,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:45,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072647416] [2021-06-05 15:02:45,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:45,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:45,553 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:45,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:45,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072647416] [2021-06-05 15:02:45,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072647416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:45,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525156382] [2021-06-05 15:02:45,554 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 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 15:02:45,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 15:02:45,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:45,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:02:45,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:46,045 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:46,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525156382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:46,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:46,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:02:46,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103999308] [2021-06-05 15:02:46,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:02:46,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:46,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:02:46,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:02:46,046 INFO L87 Difference]: Start difference. First operand 2096 states and 5217 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:46,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:46,851 INFO L93 Difference]: Finished difference Result 2414 states and 5992 transitions. [2021-06-05 15:02:46,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:02:46,851 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:02:46,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:46,854 INFO L225 Difference]: With dead ends: 2414 [2021-06-05 15:02:46,854 INFO L226 Difference]: Without dead ends: 2384 [2021-06-05 15:02:46,854 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 1171.3ms TimeCoverageRelationStatistics Valid=293, Invalid=1513, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:02:46,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2384 states. [2021-06-05 15:02:46,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2384 to 2104. [2021-06-05 15:02:46,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2104 states, 2103 states have (on average 2.4902520209224916) internal successors, (5237), 2103 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 15:02:46,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2104 states to 2104 states and 5237 transitions. [2021-06-05 15:02:46,874 INFO L78 Accepts]: Start accepts. Automaton has 2104 states and 5237 transitions. Word has length 32 [2021-06-05 15:02:46,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:46,874 INFO L482 AbstractCegarLoop]: Abstraction has 2104 states and 5237 transitions. [2021-06-05 15:02:46,874 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:46,874 INFO L276 IsEmpty]: Start isEmpty. Operand 2104 states and 5237 transitions. [2021-06-05 15:02:46,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:02:46,875 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:46,875 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:47,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2210 [2021-06-05 15:02:47,076 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:47,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:47,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1767406466, now seen corresponding path program 154 times [2021-06-05 15:02:47,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:47,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635156999] [2021-06-05 15:02:47,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:47,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:47,325 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 23 [2021-06-05 15:02:47,591 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 20 [2021-06-05 15:02:47,867 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 24 [2021-06-05 15:02:47,961 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:47,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:47,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635156999] [2021-06-05 15:02:47,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635156999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:47,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547239217] [2021-06-05 15:02:47,962 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 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 15:02:47,984 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:02:47,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:47,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:02:47,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:48,385 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:48,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547239217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:48,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:48,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:02:48,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370992590] [2021-06-05 15:02:48,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:02:48,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:48,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:02:48,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:02:48,386 INFO L87 Difference]: Start difference. First operand 2104 states and 5237 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:49,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:49,048 INFO L93 Difference]: Finished difference Result 2390 states and 5932 transitions. [2021-06-05 15:02:49,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:02:49,048 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:02:49,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:49,050 INFO L225 Difference]: With dead ends: 2390 [2021-06-05 15:02:49,050 INFO L226 Difference]: Without dead ends: 2360 [2021-06-05 15:02:49,051 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 999.9ms TimeCoverageRelationStatistics Valid=323, Invalid=1483, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:02:49,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2360 states. [2021-06-05 15:02:49,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2360 to 2144. [2021-06-05 15:02:49,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2144 states, 2143 states have (on average 2.490433971068595) internal successors, (5337), 2143 states have internal predecessors, (5337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:49,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2144 states to 2144 states and 5337 transitions. [2021-06-05 15:02:49,068 INFO L78 Accepts]: Start accepts. Automaton has 2144 states and 5337 transitions. Word has length 32 [2021-06-05 15:02:49,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:49,068 INFO L482 AbstractCegarLoop]: Abstraction has 2144 states and 5337 transitions. [2021-06-05 15:02:49,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:49,069 INFO L276 IsEmpty]: Start isEmpty. Operand 2144 states and 5337 transitions. [2021-06-05 15:02:49,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:02:49,070 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:49,070 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:49,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2233 [2021-06-05 15:02:49,270 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:49,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:49,271 INFO L82 PathProgramCache]: Analyzing trace with hash -320577802, now seen corresponding path program 155 times [2021-06-05 15:02:49,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:49,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637410965] [2021-06-05 15:02:49,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:49,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:49,725 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 33 [2021-06-05 15:02:50,161 WARN L205 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 27 [2021-06-05 15:02:50,288 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:50,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:50,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637410965] [2021-06-05 15:02:50,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637410965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:50,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927255435] [2021-06-05 15:02:50,288 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 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 15:02:50,311 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 15:02:50,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:50,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:02:50,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:50,764 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:50,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927255435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:50,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:50,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:02:50,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652992356] [2021-06-05 15:02:50,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:02:50,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:50,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:02:50,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:02:50,765 INFO L87 Difference]: Start difference. First operand 2144 states and 5337 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:51,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:51,393 INFO L93 Difference]: Finished difference Result 2326 states and 5772 transitions. [2021-06-05 15:02:51,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:02:51,393 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:02:51,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:51,395 INFO L225 Difference]: With dead ends: 2326 [2021-06-05 15:02:51,395 INFO L226 Difference]: Without dead ends: 2296 [2021-06-05 15:02:51,396 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 1044.0ms TimeCoverageRelationStatistics Valid=253, Invalid=1387, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:02:51,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2296 states. [2021-06-05 15:02:51,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2296 to 2160. [2021-06-05 15:02:51,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2160 states, 2159 states have (on average 2.490504863362668) internal successors, (5377), 2159 states have internal predecessors, (5377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:51,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2160 states to 2160 states and 5377 transitions. [2021-06-05 15:02:51,413 INFO L78 Accepts]: Start accepts. Automaton has 2160 states and 5377 transitions. Word has length 32 [2021-06-05 15:02:51,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:51,413 INFO L482 AbstractCegarLoop]: Abstraction has 2160 states and 5377 transitions. [2021-06-05 15:02:51,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:51,413 INFO L276 IsEmpty]: Start isEmpty. Operand 2160 states and 5377 transitions. [2021-06-05 15:02:51,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:02:51,415 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:51,415 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:51,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2249 [2021-06-05 15:02:51,615 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:51,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:51,615 INFO L82 PathProgramCache]: Analyzing trace with hash 972812730, now seen corresponding path program 156 times [2021-06-05 15:02:51,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:51,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181484079] [2021-06-05 15:02:51,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:51,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:51,800 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:51,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:51,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181484079] [2021-06-05 15:02:51,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181484079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:51,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348797223] [2021-06-05 15:02:51,801 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 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 15:02:51,825 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 15:02:51,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:51,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:02:51,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:52,322 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:52,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348797223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:52,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:52,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:02:52,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332679582] [2021-06-05 15:02:52,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:02:52,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:52,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:02:52,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:02:52,323 INFO L87 Difference]: Start difference. First operand 2160 states and 5377 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:53,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:53,065 INFO L93 Difference]: Finished difference Result 2374 states and 5888 transitions. [2021-06-05 15:02:53,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:02:53,065 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:02:53,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:53,067 INFO L225 Difference]: With dead ends: 2374 [2021-06-05 15:02:53,067 INFO L226 Difference]: Without dead ends: 2336 [2021-06-05 15:02:53,067 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 1085.8ms TimeCoverageRelationStatistics Valid=317, Invalid=1575, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 15:02:53,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2336 states. [2021-06-05 15:02:53,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2336 to 2168. [2021-06-05 15:02:53,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2168 states, 2167 states have (on average 2.490539916935856) internal successors, (5397), 2167 states have internal predecessors, (5397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:53,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2168 states to 2168 states and 5397 transitions. [2021-06-05 15:02:53,084 INFO L78 Accepts]: Start accepts. Automaton has 2168 states and 5397 transitions. Word has length 32 [2021-06-05 15:02:53,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:53,084 INFO L482 AbstractCegarLoop]: Abstraction has 2168 states and 5397 transitions. [2021-06-05 15:02:53,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:53,085 INFO L276 IsEmpty]: Start isEmpty. Operand 2168 states and 5397 transitions. [2021-06-05 15:02:53,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:02:53,086 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:53,086 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:53,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2268 [2021-06-05 15:02:53,286 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:53,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:53,287 INFO L82 PathProgramCache]: Analyzing trace with hash -492264066, now seen corresponding path program 157 times [2021-06-05 15:02:53,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:53,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429566603] [2021-06-05 15:02:53,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:53,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:53,455 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:53,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:53,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429566603] [2021-06-05 15:02:53,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429566603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:53,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722739782] [2021-06-05 15:02:53,456 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 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 15:02:53,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:53,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:02:53,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:53,854 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:53,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722739782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:53,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:53,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:02:53,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938910354] [2021-06-05 15:02:53,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:02:53,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:53,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:02:53,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:02:53,854 INFO L87 Difference]: Start difference. First operand 2168 states and 5397 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:54,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:54,567 INFO L93 Difference]: Finished difference Result 2470 states and 6128 transitions. [2021-06-05 15:02:54,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:02:54,568 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:02:54,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:54,570 INFO L225 Difference]: With dead ends: 2470 [2021-06-05 15:02:54,570 INFO L226 Difference]: Without dead ends: 2432 [2021-06-05 15:02:54,570 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 983.3ms TimeCoverageRelationStatistics Valid=319, Invalid=1487, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:02:54,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2432 states. [2021-06-05 15:02:54,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2432 to 2176. [2021-06-05 15:02:54,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2176 states, 2175 states have (on average 2.4905747126436784) internal successors, (5417), 2175 states have internal predecessors, (5417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:54,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2176 states to 2176 states and 5417 transitions. [2021-06-05 15:02:54,588 INFO L78 Accepts]: Start accepts. Automaton has 2176 states and 5417 transitions. Word has length 32 [2021-06-05 15:02:54,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:54,588 INFO L482 AbstractCegarLoop]: Abstraction has 2176 states and 5417 transitions. [2021-06-05 15:02:54,588 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:54,588 INFO L276 IsEmpty]: Start isEmpty. Operand 2176 states and 5417 transitions. [2021-06-05 15:02:54,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:02:54,590 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:54,590 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:54,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2291,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:54,790 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:54,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:54,790 INFO L82 PathProgramCache]: Analyzing trace with hash 954564598, now seen corresponding path program 158 times [2021-06-05 15:02:54,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:54,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091461435] [2021-06-05 15:02:54,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:54,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:54,953 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:54,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:54,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091461435] [2021-06-05 15:02:54,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091461435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:54,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098503953] [2021-06-05 15:02:54,954 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 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 15:02:54,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:02:54,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:54,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:02:54,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:55,441 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:55,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098503953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:55,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:55,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:02:55,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370892158] [2021-06-05 15:02:55,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:02:55,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:55,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:02:55,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:02:55,442 INFO L87 Difference]: Start difference. First operand 2176 states and 5417 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:56,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:56,014 INFO L93 Difference]: Finished difference Result 2430 states and 6032 transitions. [2021-06-05 15:02:56,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:02:56,015 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:02:56,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:56,017 INFO L225 Difference]: With dead ends: 2430 [2021-06-05 15:02:56,017 INFO L226 Difference]: Without dead ends: 2400 [2021-06-05 15:02:56,017 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 890.0ms TimeCoverageRelationStatistics Valid=229, Invalid=1253, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:02:56,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2400 states. [2021-06-05 15:02:56,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2400 to 2192. [2021-06-05 15:02:56,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2192 states, 2191 states have (on average 2.4906435417617527) internal successors, (5457), 2191 states have internal predecessors, (5457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:56,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2192 states to 2192 states and 5457 transitions. [2021-06-05 15:02:56,036 INFO L78 Accepts]: Start accepts. Automaton has 2192 states and 5457 transitions. Word has length 32 [2021-06-05 15:02:56,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:56,037 INFO L482 AbstractCegarLoop]: Abstraction has 2192 states and 5457 transitions. [2021-06-05 15:02:56,037 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:56,037 INFO L276 IsEmpty]: Start isEmpty. Operand 2192 states and 5457 transitions. [2021-06-05 15:02:56,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:02:56,038 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:56,038 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:56,238 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2312 [2021-06-05 15:02:56,239 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:56,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:56,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1947970502, now seen corresponding path program 159 times [2021-06-05 15:02:56,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:56,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053718726] [2021-06-05 15:02:56,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:56,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:56,426 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:56,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:56,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053718726] [2021-06-05 15:02:56,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053718726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:56,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152937472] [2021-06-05 15:02:56,426 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 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 15:02:56,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 15:02:56,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:56,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:02:56,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:56,947 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:56,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152937472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:56,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:56,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:02:56,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289545491] [2021-06-05 15:02:56,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:02:56,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:56,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:02:56,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:02:56,948 INFO L87 Difference]: Start difference. First operand 2192 states and 5457 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:57,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:57,726 INFO L93 Difference]: Finished difference Result 2486 states and 6168 transitions. [2021-06-05 15:02:57,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:02:57,726 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:02:57,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:57,728 INFO L225 Difference]: With dead ends: 2486 [2021-06-05 15:02:57,728 INFO L226 Difference]: Without dead ends: 2448 [2021-06-05 15:02:57,728 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 1151.8ms TimeCoverageRelationStatistics Valid=268, Invalid=1372, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:02:57,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2448 states. [2021-06-05 15:02:57,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2448 to 2216. [2021-06-05 15:02:57,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2216 states, 2215 states have (on average 2.490744920993228) internal successors, (5517), 2215 states have internal predecessors, (5517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:57,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2216 states to 2216 states and 5517 transitions. [2021-06-05 15:02:57,746 INFO L78 Accepts]: Start accepts. Automaton has 2216 states and 5517 transitions. Word has length 32 [2021-06-05 15:02:57,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:57,746 INFO L482 AbstractCegarLoop]: Abstraction has 2216 states and 5517 transitions. [2021-06-05 15:02:57,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:57,746 INFO L276 IsEmpty]: Start isEmpty. Operand 2216 states and 5517 transitions. [2021-06-05 15:02:57,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:02:57,747 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:57,747 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:57,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2330,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:57,948 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:57,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:57,948 INFO L82 PathProgramCache]: Analyzing trace with hash 616227062, now seen corresponding path program 160 times [2021-06-05 15:02:57,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:57,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370106858] [2021-06-05 15:02:57,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:57,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:58,166 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:58,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:58,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370106858] [2021-06-05 15:02:58,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370106858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:58,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547668992] [2021-06-05 15:02:58,166 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 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 15:02:58,189 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:02:58,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:58,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:02:58,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:58,637 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:58,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547668992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:58,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:58,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:02:58,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121398661] [2021-06-05 15:02:58,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:02:58,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:58,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:02:58,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:02:58,638 INFO L87 Difference]: Start difference. First operand 2216 states and 5517 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:59,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:59,308 INFO L93 Difference]: Finished difference Result 2382 states and 5916 transitions. [2021-06-05 15:02:59,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:02:59,308 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:02:59,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:59,310 INFO L225 Difference]: With dead ends: 2382 [2021-06-05 15:02:59,310 INFO L226 Difference]: Without dead ends: 2360 [2021-06-05 15:02:59,310 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 1017.3ms TimeCoverageRelationStatistics Valid=239, Invalid=1401, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:02:59,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2360 states. [2021-06-05 15:02:59,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2360 to 2200. [2021-06-05 15:02:59,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2200 states, 2199 states have (on average 2.490677580718508) internal successors, (5477), 2199 states have internal predecessors, (5477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:59,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2200 states to 2200 states and 5477 transitions. [2021-06-05 15:02:59,330 INFO L78 Accepts]: Start accepts. Automaton has 2200 states and 5477 transitions. Word has length 32 [2021-06-05 15:02:59,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:59,330 INFO L482 AbstractCegarLoop]: Abstraction has 2200 states and 5477 transitions. [2021-06-05 15:02:59,331 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:59,331 INFO L276 IsEmpty]: Start isEmpty. Operand 2200 states and 5477 transitions. [2021-06-05 15:02:59,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:02:59,332 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:59,332 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:59,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2355 [2021-06-05 15:02:59,533 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:59,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:59,533 INFO L82 PathProgramCache]: Analyzing trace with hash 747935042, now seen corresponding path program 161 times [2021-06-05 15:02:59,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:59,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241369211] [2021-06-05 15:02:59,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:59,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:59,770 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:59,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:59,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241369211] [2021-06-05 15:02:59,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241369211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:59,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740093386] [2021-06-05 15:02:59,771 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 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 15:02:59,795 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 15:02:59,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:59,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 15:02:59,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:00,060 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:00,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740093386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:00,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:00,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:03:00,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932806272] [2021-06-05 15:03:00,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:03:00,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:00,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:03:00,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:03:00,061 INFO L87 Difference]: Start difference. First operand 2200 states and 5477 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:00,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:00,630 INFO L93 Difference]: Finished difference Result 2294 states and 5692 transitions. [2021-06-05 15:03:00,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:03:00,630 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:03:00,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:00,632 INFO L225 Difference]: With dead ends: 2294 [2021-06-05 15:03:00,632 INFO L226 Difference]: Without dead ends: 2264 [2021-06-05 15:03:00,632 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 771.0ms TimeCoverageRelationStatistics Valid=404, Invalid=1666, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 15:03:00,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2264 states. [2021-06-05 15:03:00,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2264 to 2200. [2021-06-05 15:03:00,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2200 states, 2199 states have (on average 2.490677580718508) internal successors, (5477), 2199 states have internal predecessors, (5477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:00,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2200 states to 2200 states and 5477 transitions. [2021-06-05 15:03:00,651 INFO L78 Accepts]: Start accepts. Automaton has 2200 states and 5477 transitions. Word has length 32 [2021-06-05 15:03:00,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:00,651 INFO L482 AbstractCegarLoop]: Abstraction has 2200 states and 5477 transitions. [2021-06-05 15:03:00,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:00,651 INFO L276 IsEmpty]: Start isEmpty. Operand 2200 states and 5477 transitions. [2021-06-05 15:03:00,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:03:00,653 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:00,653 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:00,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2374,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:00,853 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:00,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:00,854 INFO L82 PathProgramCache]: Analyzing trace with hash -836348222, now seen corresponding path program 162 times [2021-06-05 15:03:00,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:00,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621294463] [2021-06-05 15:03:00,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:00,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:00,983 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:00,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:00,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621294463] [2021-06-05 15:03:00,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621294463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:00,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475599263] [2021-06-05 15:03:00,983 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 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 15:03:01,011 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 15:03:01,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:01,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:03:01,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:01,366 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:01,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475599263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:01,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:01,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:03:01,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522577438] [2021-06-05 15:03:01,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:03:01,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:01,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:03:01,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=393, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:03:01,367 INFO L87 Difference]: Start difference. First operand 2200 states and 5477 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:02,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:02,052 INFO L93 Difference]: Finished difference Result 2366 states and 5872 transitions. [2021-06-05 15:03:02,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:03:02,053 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:03:02,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:02,055 INFO L225 Difference]: With dead ends: 2366 [2021-06-05 15:03:02,055 INFO L226 Difference]: Without dead ends: 2336 [2021-06-05 15:03:02,055 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 907.0ms TimeCoverageRelationStatistics Valid=357, Invalid=1449, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:03:02,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2336 states. [2021-06-05 15:03:02,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2336 to 2200. [2021-06-05 15:03:02,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2200 states, 2199 states have (on average 2.490677580718508) internal successors, (5477), 2199 states have internal predecessors, (5477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:02,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2200 states to 2200 states and 5477 transitions. [2021-06-05 15:03:02,072 INFO L78 Accepts]: Start accepts. Automaton has 2200 states and 5477 transitions. Word has length 32 [2021-06-05 15:03:02,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:02,072 INFO L482 AbstractCegarLoop]: Abstraction has 2200 states and 5477 transitions. [2021-06-05 15:03:02,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:02,073 INFO L276 IsEmpty]: Start isEmpty. Operand 2200 states and 5477 transitions. [2021-06-05 15:03:02,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:03:02,074 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:02,074 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:02,275 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2384,171 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:02,275 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:02,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:02,275 INFO L82 PathProgramCache]: Analyzing trace with hash 579039674, now seen corresponding path program 163 times [2021-06-05 15:03:02,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:02,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460391891] [2021-06-05 15:03:02,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:02,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:02,508 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:02,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:02,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460391891] [2021-06-05 15:03:02,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460391891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:02,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23120872] [2021-06-05 15:03:02,508 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 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 15:03:02,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:02,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:03:02,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:02,957 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:02,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23120872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:02,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:02,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:03:02,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991869753] [2021-06-05 15:03:02,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:03:02,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:02,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:03:02,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:03:02,958 INFO L87 Difference]: Start difference. First operand 2200 states and 5477 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:03,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:03,570 INFO L93 Difference]: Finished difference Result 2510 states and 6228 transitions. [2021-06-05 15:03:03,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:03:03,571 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:03:03,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:03,573 INFO L225 Difference]: With dead ends: 2510 [2021-06-05 15:03:03,573 INFO L226 Difference]: Without dead ends: 2472 [2021-06-05 15:03:03,573 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 1026.4ms TimeCoverageRelationStatistics Valid=258, Invalid=1302, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:03:03,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2472 states. [2021-06-05 15:03:03,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2472 to 2192. [2021-06-05 15:03:03,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2192 states, 2191 states have (on average 2.4906435417617527) internal successors, (5457), 2191 states have internal predecessors, (5457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:03,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2192 states to 2192 states and 5457 transitions. [2021-06-05 15:03:03,592 INFO L78 Accepts]: Start accepts. Automaton has 2192 states and 5457 transitions. Word has length 32 [2021-06-05 15:03:03,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:03,592 INFO L482 AbstractCegarLoop]: Abstraction has 2192 states and 5457 transitions. [2021-06-05 15:03:03,592 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:03,592 INFO L276 IsEmpty]: Start isEmpty. Operand 2192 states and 5457 transitions. [2021-06-05 15:03:03,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:03:03,594 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:03,594 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:03,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2404,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:03,794 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:03,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:03,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1854182074, now seen corresponding path program 164 times [2021-06-05 15:03:03,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:03,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980615693] [2021-06-05 15:03:03,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:03,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:03,972 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:03,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:03,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980615693] [2021-06-05 15:03:03,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980615693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:03,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007680612] [2021-06-05 15:03:03,972 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 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 15:03:03,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:03:03,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:03,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:03:03,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:04,455 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:04,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007680612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:04,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:04,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:03:04,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093572255] [2021-06-05 15:03:04,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:03:04,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:04,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:03:04,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:03:04,456 INFO L87 Difference]: Start difference. First operand 2192 states and 5457 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:05,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:05,190 INFO L93 Difference]: Finished difference Result 2446 states and 6068 transitions. [2021-06-05 15:03:05,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:03:05,190 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:03:05,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:05,192 INFO L225 Difference]: With dead ends: 2446 [2021-06-05 15:03:05,192 INFO L226 Difference]: Without dead ends: 2408 [2021-06-05 15:03:05,192 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 1098.4ms TimeCoverageRelationStatistics Valid=291, Invalid=1515, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:03:05,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2408 states. [2021-06-05 15:03:05,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2408 to 2208. [2021-06-05 15:03:05,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2208 states, 2207 states have (on average 2.490711372904395) internal successors, (5497), 2207 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 15:03:05,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2208 states to 2208 states and 5497 transitions. [2021-06-05 15:03:05,210 INFO L78 Accepts]: Start accepts. Automaton has 2208 states and 5497 transitions. Word has length 32 [2021-06-05 15:03:05,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:05,210 INFO L482 AbstractCegarLoop]: Abstraction has 2208 states and 5497 transitions. [2021-06-05 15:03:05,211 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:05,211 INFO L276 IsEmpty]: Start isEmpty. Operand 2208 states and 5497 transitions. [2021-06-05 15:03:05,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:03:05,212 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:05,212 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:05,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2419,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:05,413 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:05,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:05,413 INFO L82 PathProgramCache]: Analyzing trace with hash 389105278, now seen corresponding path program 165 times [2021-06-05 15:03:05,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:05,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157976365] [2021-06-05 15:03:05,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:05,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:05,612 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:05,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:05,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157976365] [2021-06-05 15:03:05,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157976365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:05,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898834304] [2021-06-05 15:03:05,612 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 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 15:03:05,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 15:03:05,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:05,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 15:03:05,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:05,956 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:05,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898834304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:05,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:05,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:03:05,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743332387] [2021-06-05 15:03:05,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:03:05,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:05,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:03:05,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:03:05,957 INFO L87 Difference]: Start difference. First operand 2208 states and 5497 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:06,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:06,643 INFO L93 Difference]: Finished difference Result 2534 states and 6288 transitions. [2021-06-05 15:03:06,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:03:06,643 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:03:06,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:06,646 INFO L225 Difference]: With dead ends: 2534 [2021-06-05 15:03:06,646 INFO L226 Difference]: Without dead ends: 2496 [2021-06-05 15:03:06,646 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 932.0ms TimeCoverageRelationStatistics Valid=335, Invalid=1557, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 15:03:06,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2496 states. [2021-06-05 15:03:06,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2496 to 2240. [2021-06-05 15:03:06,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2240 states, 2239 states have (on average 2.4908441268423402) internal successors, (5577), 2239 states have internal predecessors, (5577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:06,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2240 states to 2240 states and 5577 transitions. [2021-06-05 15:03:06,667 INFO L78 Accepts]: Start accepts. Automaton has 2240 states and 5577 transitions. Word has length 32 [2021-06-05 15:03:06,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:06,667 INFO L482 AbstractCegarLoop]: Abstraction has 2240 states and 5577 transitions. [2021-06-05 15:03:06,667 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:06,667 INFO L276 IsEmpty]: Start isEmpty. Operand 2240 states and 5577 transitions. [2021-06-05 15:03:06,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:03:06,669 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:06,669 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:06,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2442 [2021-06-05 15:03:06,870 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:06,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:06,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1648243642, now seen corresponding path program 166 times [2021-06-05 15:03:06,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:06,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093416302] [2021-06-05 15:03:06,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:06,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:07,031 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:07,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:07,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093416302] [2021-06-05 15:03:07,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093416302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:07,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755230128] [2021-06-05 15:03:07,032 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 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 15:03:07,055 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:03:07,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:07,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:03:07,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:07,467 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:07,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755230128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:07,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:07,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:03:07,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57535545] [2021-06-05 15:03:07,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:03:07,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:07,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:03:07,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:03:07,468 INFO L87 Difference]: Start difference. First operand 2240 states and 5577 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:08,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:08,197 INFO L93 Difference]: Finished difference Result 2470 states and 6132 transitions. [2021-06-05 15:03:08,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:03:08,197 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:03:08,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:08,199 INFO L225 Difference]: With dead ends: 2470 [2021-06-05 15:03:08,199 INFO L226 Difference]: Without dead ends: 2440 [2021-06-05 15:03:08,200 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1010.5ms TimeCoverageRelationStatistics Valid=301, Invalid=1421, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 15:03:08,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2440 states. [2021-06-05 15:03:08,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2440 to 2248. [2021-06-05 15:03:08,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2248 states, 2247 states have (on average 2.490876724521584) internal successors, (5597), 2247 states have internal predecessors, (5597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:08,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2248 states to 2248 states and 5597 transitions. [2021-06-05 15:03:08,218 INFO L78 Accepts]: Start accepts. Automaton has 2248 states and 5597 transitions. Word has length 32 [2021-06-05 15:03:08,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:08,218 INFO L482 AbstractCegarLoop]: Abstraction has 2248 states and 5597 transitions. [2021-06-05 15:03:08,218 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:08,218 INFO L276 IsEmpty]: Start isEmpty. Operand 2248 states and 5597 transitions. [2021-06-05 15:03:08,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:03:08,220 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:08,220 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:08,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2457 [2021-06-05 15:03:08,429 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:08,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:08,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1835933942, now seen corresponding path program 167 times [2021-06-05 15:03:08,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:08,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406795002] [2021-06-05 15:03:08,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:08,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:08,595 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:08,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:08,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406795002] [2021-06-05 15:03:08,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406795002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:08,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404977986] [2021-06-05 15:03:08,596 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 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 15:03:08,620 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 15:03:08,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:08,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:03:08,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:09,079 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:09,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404977986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:09,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:09,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:03:09,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39212127] [2021-06-05 15:03:09,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:03:09,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:09,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:03:09,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:03:09,080 INFO L87 Difference]: Start difference. First operand 2248 states and 5597 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:09,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:09,714 INFO L93 Difference]: Finished difference Result 2502 states and 6216 transitions. [2021-06-05 15:03:09,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:03:09,715 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:03:09,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:09,717 INFO L225 Difference]: With dead ends: 2502 [2021-06-05 15:03:09,717 INFO L226 Difference]: Without dead ends: 2472 [2021-06-05 15:03:09,717 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 1006.8ms TimeCoverageRelationStatistics Valid=235, Invalid=1247, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:03:09,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2472 states. [2021-06-05 15:03:09,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2472 to 2224. [2021-06-05 15:03:09,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2224 states, 2223 states have (on average 2.490778227620333) internal successors, (5537), 2223 states have internal predecessors, (5537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:09,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2224 states to 2224 states and 5537 transitions. [2021-06-05 15:03:09,738 INFO L78 Accepts]: Start accepts. Automaton has 2224 states and 5537 transitions. Word has length 32 [2021-06-05 15:03:09,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:09,738 INFO L482 AbstractCegarLoop]: Abstraction has 2224 states and 5537 transitions. [2021-06-05 15:03:09,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:09,738 INFO L276 IsEmpty]: Start isEmpty. Operand 2224 states and 5537 transitions. [2021-06-05 15:03:09,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:03:09,739 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:09,740 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:09,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2471,176 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:09,956 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:09,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:09,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1066601158, now seen corresponding path program 168 times [2021-06-05 15:03:09,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:09,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782211579] [2021-06-05 15:03:09,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:09,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:10,164 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:10,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:10,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782211579] [2021-06-05 15:03:10,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782211579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:10,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131516997] [2021-06-05 15:03:10,164 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 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 15:03:10,189 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 15:03:10,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:10,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:03:10,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:10,673 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:10,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131516997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:10,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:10,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:03:10,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134611841] [2021-06-05 15:03:10,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:03:10,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:10,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:03:10,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:03:10,674 INFO L87 Difference]: Start difference. First operand 2224 states and 5537 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:11,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:11,390 INFO L93 Difference]: Finished difference Result 2478 states and 6156 transitions. [2021-06-05 15:03:11,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:03:11,390 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:03:11,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:11,393 INFO L225 Difference]: With dead ends: 2478 [2021-06-05 15:03:11,393 INFO L226 Difference]: Without dead ends: 2456 [2021-06-05 15:03:11,393 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 1125.6ms TimeCoverageRelationStatistics Valid=288, Invalid=1434, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 15:03:11,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2456 states. [2021-06-05 15:03:11,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2456 to 2232. [2021-06-05 15:03:11,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2232 states, 2231 states have (on average 2.4908112953832364) internal successors, (5557), 2231 states have internal predecessors, (5557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:11,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2232 states to 2232 states and 5557 transitions. [2021-06-05 15:03:11,414 INFO L78 Accepts]: Start accepts. Automaton has 2232 states and 5557 transitions. Word has length 32 [2021-06-05 15:03:11,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:11,414 INFO L482 AbstractCegarLoop]: Abstraction has 2232 states and 5557 transitions. [2021-06-05 15:03:11,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:11,414 INFO L276 IsEmpty]: Start isEmpty. Operand 2232 states and 5557 transitions. [2021-06-05 15:03:11,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:03:11,416 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:11,416 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:11,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2487 [2021-06-05 15:03:11,616 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:11,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:11,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1497596406, now seen corresponding path program 169 times [2021-06-05 15:03:11,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:11,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349009351] [2021-06-05 15:03:11,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:11,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:11,781 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:11,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:11,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349009351] [2021-06-05 15:03:11,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349009351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:11,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65164548] [2021-06-05 15:03:11,782 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 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 15:03:11,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:11,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:03:11,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:12,259 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:12,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65164548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:12,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:12,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:03:12,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274023687] [2021-06-05 15:03:12,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:03:12,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:12,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:03:12,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:03:12,260 INFO L87 Difference]: Start difference. First operand 2232 states and 5557 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:12,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:12,889 INFO L93 Difference]: Finished difference Result 2406 states and 5976 transitions. [2021-06-05 15:03:12,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:03:12,889 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:03:12,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:12,891 INFO L225 Difference]: With dead ends: 2406 [2021-06-05 15:03:12,891 INFO L226 Difference]: Without dead ends: 2384 [2021-06-05 15:03:12,891 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 989.1ms TimeCoverageRelationStatistics Valid=231, Invalid=1329, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:03:12,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2384 states. [2021-06-05 15:03:12,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2384 to 2224. [2021-06-05 15:03:12,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2224 states, 2223 states have (on average 2.490778227620333) internal successors, (5537), 2223 states have internal predecessors, (5537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:12,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2224 states to 2224 states and 5537 transitions. [2021-06-05 15:03:12,909 INFO L78 Accepts]: Start accepts. Automaton has 2224 states and 5537 transitions. Word has length 32 [2021-06-05 15:03:12,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:12,909 INFO L482 AbstractCegarLoop]: Abstraction has 2224 states and 5537 transitions. [2021-06-05 15:03:12,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:12,909 INFO L276 IsEmpty]: Start isEmpty. Operand 2224 states and 5537 transitions. [2021-06-05 15:03:12,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:03:12,911 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:12,911 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:13,111 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2511 [2021-06-05 15:03:13,111 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:13,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:13,112 INFO L82 PathProgramCache]: Analyzing trace with hash 617903418, now seen corresponding path program 170 times [2021-06-05 15:03:13,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:13,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629140460] [2021-06-05 15:03:13,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:13,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:13,301 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:13,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:13,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629140460] [2021-06-05 15:03:13,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629140460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:13,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605630604] [2021-06-05 15:03:13,301 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 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 15:03:13,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:03:13,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:13,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:03:13,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:13,745 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:13,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605630604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:13,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:13,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:03:13,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904999649] [2021-06-05 15:03:13,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:03:13,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:13,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:03:13,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:03:13,746 INFO L87 Difference]: Start difference. First operand 2224 states and 5537 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:14,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:14,439 INFO L93 Difference]: Finished difference Result 2366 states and 5868 transitions. [2021-06-05 15:03:14,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:03:14,440 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:03:14,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:14,442 INFO L225 Difference]: With dead ends: 2366 [2021-06-05 15:03:14,442 INFO L226 Difference]: Without dead ends: 2328 [2021-06-05 15:03:14,442 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 925.6ms TimeCoverageRelationStatistics Valid=266, Invalid=1294, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:03:14,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-06-05 15:03:14,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 2232. [2021-06-05 15:03:14,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2232 states, 2231 states have (on average 2.4908112953832364) internal successors, (5557), 2231 states have internal predecessors, (5557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:14,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2232 states to 2232 states and 5557 transitions. [2021-06-05 15:03:14,464 INFO L78 Accepts]: Start accepts. Automaton has 2232 states and 5557 transitions. Word has length 32 [2021-06-05 15:03:14,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:14,464 INFO L482 AbstractCegarLoop]: Abstraction has 2232 states and 5557 transitions. [2021-06-05 15:03:14,464 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:14,464 INFO L276 IsEmpty]: Start isEmpty. Operand 2232 states and 5557 transitions. [2021-06-05 15:03:14,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:03:14,466 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:14,466 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:14,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2529,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:14,682 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:14,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:14,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1638894150, now seen corresponding path program 171 times [2021-06-05 15:03:14,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:14,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366007165] [2021-06-05 15:03:14,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:14,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:14,923 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:14,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:14,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366007165] [2021-06-05 15:03:14,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366007165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:14,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721065647] [2021-06-05 15:03:14,923 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 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 15:03:14,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 15:03:14,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:14,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:03:14,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:15,270 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:15,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721065647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:15,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:15,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:03:15,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191806202] [2021-06-05 15:03:15,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:03:15,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:15,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:03:15,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:03:15,271 INFO L87 Difference]: Start difference. First operand 2232 states and 5557 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:15,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:15,995 INFO L93 Difference]: Finished difference Result 2422 states and 6016 transitions. [2021-06-05 15:03:15,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:03:15,995 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:03:15,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:15,997 INFO L225 Difference]: With dead ends: 2422 [2021-06-05 15:03:15,997 INFO L226 Difference]: Without dead ends: 2392 [2021-06-05 15:03:15,998 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 953.4ms TimeCoverageRelationStatistics Valid=373, Invalid=1697, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 15:03:15,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2392 states. [2021-06-05 15:03:16,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2392 to 2232. [2021-06-05 15:03:16,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2232 states, 2231 states have (on average 2.4908112953832364) internal successors, (5557), 2231 states have internal predecessors, (5557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:16,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2232 states to 2232 states and 5557 transitions. [2021-06-05 15:03:16,015 INFO L78 Accepts]: Start accepts. Automaton has 2232 states and 5557 transitions. Word has length 32 [2021-06-05 15:03:16,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:16,015 INFO L482 AbstractCegarLoop]: Abstraction has 2232 states and 5557 transitions. [2021-06-05 15:03:16,015 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:16,015 INFO L276 IsEmpty]: Start isEmpty. Operand 2232 states and 5557 transitions. [2021-06-05 15:03:16,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:03:16,017 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:16,017 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:16,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2551 [2021-06-05 15:03:16,217 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:16,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:16,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1657142282, now seen corresponding path program 172 times [2021-06-05 15:03:16,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:16,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874983378] [2021-06-05 15:03:16,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:16,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:16,393 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:16,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:16,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874983378] [2021-06-05 15:03:16,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874983378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:16,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894286046] [2021-06-05 15:03:16,393 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 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 15:03:16,418 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:03:16,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:16,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:03:16,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:16,787 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:16,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894286046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:16,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:16,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:03:16,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652937396] [2021-06-05 15:03:16,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:03:16,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:16,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:03:16,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:03:16,788 INFO L87 Difference]: Start difference. First operand 2232 states and 5557 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:17,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:17,262 INFO L93 Difference]: Finished difference Result 2430 states and 6032 transitions. [2021-06-05 15:03:17,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:03:17,262 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:03:17,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:17,264 INFO L225 Difference]: With dead ends: 2430 [2021-06-05 15:03:17,264 INFO L226 Difference]: Without dead ends: 2400 [2021-06-05 15:03:17,264 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 777.8ms TimeCoverageRelationStatistics Valid=210, Invalid=1196, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:03:17,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2400 states. [2021-06-05 15:03:17,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2400 to 2240. [2021-06-05 15:03:17,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2240 states, 2239 states have (on average 2.4908441268423402) internal successors, (5577), 2239 states have internal predecessors, (5577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:17,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2240 states to 2240 states and 5577 transitions. [2021-06-05 15:03:17,282 INFO L78 Accepts]: Start accepts. Automaton has 2240 states and 5577 transitions. Word has length 32 [2021-06-05 15:03:17,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:17,283 INFO L482 AbstractCegarLoop]: Abstraction has 2240 states and 5577 transitions. [2021-06-05 15:03:17,283 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:17,283 INFO L276 IsEmpty]: Start isEmpty. Operand 2240 states and 5577 transitions. [2021-06-05 15:03:17,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:03:17,284 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:17,284 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:17,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2566 [2021-06-05 15:03:17,485 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:17,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:17,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1948035014, now seen corresponding path program 173 times [2021-06-05 15:03:17,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:17,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680639494] [2021-06-05 15:03:17,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:17,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:17,710 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:17,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:17,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680639494] [2021-06-05 15:03:17,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680639494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:17,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476386358] [2021-06-05 15:03:17,710 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 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 15:03:17,734 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 15:03:17,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:17,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 15:03:17,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:18,021 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:18,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476386358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:18,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:18,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:03:18,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109116616] [2021-06-05 15:03:18,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:03:18,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:18,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:03:18,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:03:18,022 INFO L87 Difference]: Start difference. First operand 2240 states and 5577 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:18,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:18,411 INFO L93 Difference]: Finished difference Result 2334 states and 5792 transitions. [2021-06-05 15:03:18,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:03:18,411 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:03:18,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:18,413 INFO L225 Difference]: With dead ends: 2334 [2021-06-05 15:03:18,413 INFO L226 Difference]: Without dead ends: 2304 [2021-06-05 15:03:18,414 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 683.6ms TimeCoverageRelationStatistics Valid=287, Invalid=1119, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:03:18,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2304 states. [2021-06-05 15:03:18,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2304 to 2240. [2021-06-05 15:03:18,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2240 states, 2239 states have (on average 2.4908441268423402) internal successors, (5577), 2239 states have internal predecessors, (5577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:18,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2240 states to 2240 states and 5577 transitions. [2021-06-05 15:03:18,432 INFO L78 Accepts]: Start accepts. Automaton has 2240 states and 5577 transitions. Word has length 32 [2021-06-05 15:03:18,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:18,432 INFO L482 AbstractCegarLoop]: Abstraction has 2240 states and 5577 transitions. [2021-06-05 15:03:18,433 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:18,433 INFO L276 IsEmpty]: Start isEmpty. Operand 2240 states and 5577 transitions. [2021-06-05 15:03:18,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:03:18,434 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:18,434 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:18,634 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2582,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:18,635 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:18,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:18,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1198122614, now seen corresponding path program 174 times [2021-06-05 15:03:18,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:18,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451528378] [2021-06-05 15:03:18,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:18,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:18,805 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:18,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:18,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451528378] [2021-06-05 15:03:18,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451528378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:18,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373957005] [2021-06-05 15:03:18,805 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 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 15:03:18,830 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 15:03:18,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:18,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:03:18,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:19,149 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:19,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373957005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:19,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:19,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:03:19,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230524381] [2021-06-05 15:03:19,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:03:19,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:19,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:03:19,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:03:19,150 INFO L87 Difference]: Start difference. First operand 2240 states and 5577 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:19,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:19,638 INFO L93 Difference]: Finished difference Result 2334 states and 5792 transitions. [2021-06-05 15:03:19,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:03:19,638 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:03:19,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:19,641 INFO L225 Difference]: With dead ends: 2334 [2021-06-05 15:03:19,641 INFO L226 Difference]: Without dead ends: 2304 [2021-06-05 15:03:19,641 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 679.4ms TimeCoverageRelationStatistics Valid=226, Invalid=1256, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:03:19,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2304 states. [2021-06-05 15:03:19,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2304 to 2248. [2021-06-05 15:03:19,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2248 states, 2247 states have (on average 2.490876724521584) internal successors, (5597), 2247 states have internal predecessors, (5597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:19,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2248 states to 2248 states and 5597 transitions. [2021-06-05 15:03:19,659 INFO L78 Accepts]: Start accepts. Automaton has 2248 states and 5597 transitions. Word has length 32 [2021-06-05 15:03:19,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:19,659 INFO L482 AbstractCegarLoop]: Abstraction has 2248 states and 5597 transitions. [2021-06-05 15:03:19,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:19,659 INFO L276 IsEmpty]: Start isEmpty. Operand 2248 states and 5597 transitions. [2021-06-05 15:03:19,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:03:19,661 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:19,661 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:19,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2590 [2021-06-05 15:03:19,862 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:19,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:19,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1997723914, now seen corresponding path program 175 times [2021-06-05 15:03:19,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:19,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102092718] [2021-06-05 15:03:19,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:19,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:20,046 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:20,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:20,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102092718] [2021-06-05 15:03:20,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102092718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:20,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235150838] [2021-06-05 15:03:20,046 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 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 15:03:20,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:20,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:03:20,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:20,375 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:20,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235150838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:20,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:20,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:03:20,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048042454] [2021-06-05 15:03:20,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:03:20,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:20,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:03:20,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:03:20,376 INFO L87 Difference]: Start difference. First operand 2248 states and 5597 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:20,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:20,848 INFO L93 Difference]: Finished difference Result 2358 states and 5852 transitions. [2021-06-05 15:03:20,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:03:20,849 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:03:20,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:20,851 INFO L225 Difference]: With dead ends: 2358 [2021-06-05 15:03:20,851 INFO L226 Difference]: Without dead ends: 2328 [2021-06-05 15:03:20,851 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 742.8ms TimeCoverageRelationStatistics Valid=317, Invalid=1243, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:03:20,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-06-05 15:03:20,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 2240. [2021-06-05 15:03:20,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2240 states, 2239 states have (on average 2.4908441268423402) internal successors, (5577), 2239 states have internal predecessors, (5577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:20,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2240 states to 2240 states and 5577 transitions. [2021-06-05 15:03:20,868 INFO L78 Accepts]: Start accepts. Automaton has 2240 states and 5577 transitions. Word has length 32 [2021-06-05 15:03:20,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:20,869 INFO L482 AbstractCegarLoop]: Abstraction has 2240 states and 5577 transitions. [2021-06-05 15:03:20,869 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:20,869 INFO L276 IsEmpty]: Start isEmpty. Operand 2240 states and 5577 transitions. [2021-06-05 15:03:20,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:03:20,870 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:20,870 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:21,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2614,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:21,071 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:21,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:21,071 INFO L82 PathProgramCache]: Analyzing trace with hash 142122878, now seen corresponding path program 176 times [2021-06-05 15:03:21,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:21,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721710411] [2021-06-05 15:03:21,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:21,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:21,371 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 15 [2021-06-05 15:03:21,528 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:21,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:21,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721710411] [2021-06-05 15:03:21,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721710411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:21,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128084585] [2021-06-05 15:03:21,528 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 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 15:03:21,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:03:21,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:21,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:03:21,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:21,874 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:21,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128084585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:21,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:21,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:03:21,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140225526] [2021-06-05 15:03:21,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:03:21,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:21,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:03:21,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:03:21,875 INFO L87 Difference]: Start difference. First operand 2240 states and 5577 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:22,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:22,414 INFO L93 Difference]: Finished difference Result 2350 states and 5836 transitions. [2021-06-05 15:03:22,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:03:22,415 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:03:22,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:22,417 INFO L225 Difference]: With dead ends: 2350 [2021-06-05 15:03:22,417 INFO L226 Difference]: Without dead ends: 2328 [2021-06-05 15:03:22,417 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 661.6ms TimeCoverageRelationStatistics Valid=226, Invalid=1256, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:03:22,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-06-05 15:03:22,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 2256. [2021-06-05 15:03:22,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2256 states, 2255 states have (on average 2.4909090909090907) internal successors, (5617), 2255 states have internal predecessors, (5617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:22,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2256 states to 2256 states and 5617 transitions. [2021-06-05 15:03:22,434 INFO L78 Accepts]: Start accepts. Automaton has 2256 states and 5617 transitions. Word has length 32 [2021-06-05 15:03:22,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:22,434 INFO L482 AbstractCegarLoop]: Abstraction has 2256 states and 5617 transitions. [2021-06-05 15:03:22,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:22,435 INFO L276 IsEmpty]: Start isEmpty. Operand 2256 states and 5617 transitions. [2021-06-05 15:03:22,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:03:22,436 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:22,436 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:22,643 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2632 [2021-06-05 15:03:22,644 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:22,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:22,644 INFO L82 PathProgramCache]: Analyzing trace with hash -383904958, now seen corresponding path program 177 times [2021-06-05 15:03:22,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:22,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586671812] [2021-06-05 15:03:22,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:22,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:22,825 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:22,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:22,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586671812] [2021-06-05 15:03:22,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586671812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:22,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344557222] [2021-06-05 15:03:22,826 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 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 15:03:22,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 15:03:22,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:22,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:03:22,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:23,163 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:23,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344557222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:23,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:23,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:03:23,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161687587] [2021-06-05 15:03:23,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:03:23,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:23,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:03:23,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:03:23,164 INFO L87 Difference]: Start difference. First operand 2256 states and 5617 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:23,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:23,725 INFO L93 Difference]: Finished difference Result 2398 states and 5952 transitions. [2021-06-05 15:03:23,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:03:23,725 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:03:23,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:23,727 INFO L225 Difference]: With dead ends: 2398 [2021-06-05 15:03:23,727 INFO L226 Difference]: Without dead ends: 2368 [2021-06-05 15:03:23,727 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 807.5ms TimeCoverageRelationStatistics Valid=306, Invalid=1176, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:03:23,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2368 states. [2021-06-05 15:03:23,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2368 to 2272. [2021-06-05 15:03:23,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2272 states, 2271 states have (on average 2.4909731395860852) internal successors, (5657), 2271 states have internal predecessors, (5657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:23,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2272 states to 2272 states and 5657 transitions. [2021-06-05 15:03:23,748 INFO L78 Accepts]: Start accepts. Automaton has 2272 states and 5657 transitions. Word has length 32 [2021-06-05 15:03:23,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:23,748 INFO L482 AbstractCegarLoop]: Abstraction has 2272 states and 5657 transitions. [2021-06-05 15:03:23,748 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:23,748 INFO L276 IsEmpty]: Start isEmpty. Operand 2272 states and 5657 transitions. [2021-06-05 15:03:23,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:03:23,750 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:23,750 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:23,950 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2646,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:23,950 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:23,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:23,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1534555074, now seen corresponding path program 178 times [2021-06-05 15:03:23,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:23,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103932823] [2021-06-05 15:03:23,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:23,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:24,181 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:24,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:24,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103932823] [2021-06-05 15:03:24,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103932823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:24,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485622025] [2021-06-05 15:03:24,181 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 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 15:03:24,204 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:03:24,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:24,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:03:24,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:24,608 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:24,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485622025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:24,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:24,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:03:24,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929889123] [2021-06-05 15:03:24,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:03:24,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:24,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:03:24,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:03:24,609 INFO L87 Difference]: Start difference. First operand 2272 states and 5657 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:25,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:25,286 INFO L93 Difference]: Finished difference Result 2502 states and 6212 transitions. [2021-06-05 15:03:25,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:03:25,286 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:03:25,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:25,288 INFO L225 Difference]: With dead ends: 2502 [2021-06-05 15:03:25,288 INFO L226 Difference]: Without dead ends: 2472 [2021-06-05 15:03:25,289 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 1029.3ms TimeCoverageRelationStatistics Valid=263, Invalid=1377, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:03:25,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2472 states. [2021-06-05 15:03:25,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2472 to 2280. [2021-06-05 15:03:25,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2280 states, 2279 states have (on average 2.4910048266783678) internal successors, (5677), 2279 states have internal predecessors, (5677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:25,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2280 states to 2280 states and 5677 transitions. [2021-06-05 15:03:25,308 INFO L78 Accepts]: Start accepts. Automaton has 2280 states and 5677 transitions. Word has length 32 [2021-06-05 15:03:25,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:25,308 INFO L482 AbstractCegarLoop]: Abstraction has 2280 states and 5677 transitions. [2021-06-05 15:03:25,308 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:25,308 INFO L276 IsEmpty]: Start isEmpty. Operand 2280 states and 5677 transitions. [2021-06-05 15:03:25,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:03:25,310 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:25,310 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:25,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 187 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2662 [2021-06-05 15:03:25,510 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:25,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:25,510 INFO L82 PathProgramCache]: Analyzing trace with hash -196214658, now seen corresponding path program 179 times [2021-06-05 15:03:25,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:25,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484572454] [2021-06-05 15:03:25,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:25,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:25,733 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:25,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:25,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484572454] [2021-06-05 15:03:25,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484572454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:25,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126267067] [2021-06-05 15:03:25,733 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 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 15:03:25,757 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 15:03:25,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:25,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 15:03:25,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:26,086 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:26,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126267067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:26,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:26,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:03:26,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798750582] [2021-06-05 15:03:26,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:03:26,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:26,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:03:26,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:03:26,087 INFO L87 Difference]: Start difference. First operand 2280 states and 5677 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:26,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:26,621 INFO L93 Difference]: Finished difference Result 2438 states and 6056 transitions. [2021-06-05 15:03:26,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:03:26,622 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:03:26,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:26,624 INFO L225 Difference]: With dead ends: 2438 [2021-06-05 15:03:26,624 INFO L226 Difference]: Without dead ends: 2416 [2021-06-05 15:03:26,624 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 745.0ms TimeCoverageRelationStatistics Valid=252, Invalid=1388, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:03:26,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2416 states. [2021-06-05 15:03:26,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2416 to 2280. [2021-06-05 15:03:26,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2280 states, 2279 states have (on average 2.4910048266783678) internal successors, (5677), 2279 states have internal predecessors, (5677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:26,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2280 states to 2280 states and 5677 transitions. [2021-06-05 15:03:26,644 INFO L78 Accepts]: Start accepts. Automaton has 2280 states and 5677 transitions. Word has length 32 [2021-06-05 15:03:26,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:26,644 INFO L482 AbstractCegarLoop]: Abstraction has 2280 states and 5677 transitions. [2021-06-05 15:03:26,644 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:26,644 INFO L276 IsEmpty]: Start isEmpty. Operand 2280 states and 5677 transitions. [2021-06-05 15:03:26,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:03:26,646 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:26,646 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:26,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2680,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:26,846 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:26,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:26,847 INFO L82 PathProgramCache]: Analyzing trace with hash 872989310, now seen corresponding path program 180 times [2021-06-05 15:03:26,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:26,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223183079] [2021-06-05 15:03:26,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:26,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:26,978 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:26,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:26,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223183079] [2021-06-05 15:03:26,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223183079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:26,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374910977] [2021-06-05 15:03:26,978 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 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 15:03:27,001 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 15:03:27,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:27,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:03:27,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:27,446 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:27,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374910977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:27,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:27,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:03:27,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954112408] [2021-06-05 15:03:27,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:03:27,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:27,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:03:27,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:03:27,447 INFO L87 Difference]: Start difference. First operand 2280 states and 5677 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:28,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:28,019 INFO L93 Difference]: Finished difference Result 2534 states and 6288 transitions. [2021-06-05 15:03:28,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:03:28,019 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:03:28,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:28,021 INFO L225 Difference]: With dead ends: 2534 [2021-06-05 15:03:28,021 INFO L226 Difference]: Without dead ends: 2496 [2021-06-05 15:03:28,022 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 872.4ms TimeCoverageRelationStatistics Valid=227, Invalid=1255, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:03:28,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2496 states. [2021-06-05 15:03:28,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2496 to 2304. [2021-06-05 15:03:28,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2304 states, 2303 states have (on average 2.491098567086409) internal successors, (5737), 2303 states have internal predecessors, (5737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:28,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2304 states to 2304 states and 5737 transitions. [2021-06-05 15:03:28,041 INFO L78 Accepts]: Start accepts. Automaton has 2304 states and 5737 transitions. Word has length 32 [2021-06-05 15:03:28,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:28,041 INFO L482 AbstractCegarLoop]: Abstraction has 2304 states and 5737 transitions. [2021-06-05 15:03:28,041 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:28,042 INFO L276 IsEmpty]: Start isEmpty. Operand 2304 states and 5737 transitions. [2021-06-05 15:03:28,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:03:28,043 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:28,043 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:28,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2693,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:28,253 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:28,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:28,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1060679610, now seen corresponding path program 181 times [2021-06-05 15:03:28,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:28,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275915421] [2021-06-05 15:03:28,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:28,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:28,378 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:28,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:28,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275915421] [2021-06-05 15:03:28,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275915421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:28,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050965323] [2021-06-05 15:03:28,379 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 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 15:03:28,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:28,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:03:28,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:28,924 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:28,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050965323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:28,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:28,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:03:28,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402426756] [2021-06-05 15:03:28,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:03:28,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:28,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:03:28,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:03:28,926 INFO L87 Difference]: Start difference. First operand 2304 states and 5737 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:29,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:29,600 INFO L93 Difference]: Finished difference Result 2598 states and 6448 transitions. [2021-06-05 15:03:29,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:03:29,600 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:03:29,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:29,603 INFO L225 Difference]: With dead ends: 2598 [2021-06-05 15:03:29,603 INFO L226 Difference]: Without dead ends: 2560 [2021-06-05 15:03:29,603 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 1008.7ms TimeCoverageRelationStatistics Valid=277, Invalid=1363, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:03:29,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2560 states. [2021-06-05 15:03:29,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2560 to 2296. [2021-06-05 15:03:29,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2296 states, 2295 states have (on average 2.491067538126362) internal successors, (5717), 2295 states have internal predecessors, (5717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:29,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2296 states to 2296 states and 5717 transitions. [2021-06-05 15:03:29,625 INFO L78 Accepts]: Start accepts. Automaton has 2296 states and 5717 transitions. Word has length 32 [2021-06-05 15:03:29,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:29,625 INFO L482 AbstractCegarLoop]: Abstraction has 2296 states and 5717 transitions. [2021-06-05 15:03:29,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:29,625 INFO L276 IsEmpty]: Start isEmpty. Operand 2296 states and 5717 transitions. [2021-06-05 15:03:29,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:03:29,627 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:29,627 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:29,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2710 [2021-06-05 15:03:29,827 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:29,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:29,828 INFO L82 PathProgramCache]: Analyzing trace with hash 534651774, now seen corresponding path program 182 times [2021-06-05 15:03:29,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:29,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796100507] [2021-06-05 15:03:29,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:29,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:30,013 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:30,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:30,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796100507] [2021-06-05 15:03:30,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796100507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:30,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573851272] [2021-06-05 15:03:30,013 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 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 15:03:30,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:03:30,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:30,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 15:03:30,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:30,317 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:30,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573851272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:30,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:30,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:03:30,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359695856] [2021-06-05 15:03:30,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:03:30,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:30,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:03:30,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:03:30,318 INFO L87 Difference]: Start difference. First operand 2296 states and 5717 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:30,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:30,726 INFO L93 Difference]: Finished difference Result 2446 states and 6068 transitions. [2021-06-05 15:03:30,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:03:30,726 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:03:30,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:30,728 INFO L225 Difference]: With dead ends: 2446 [2021-06-05 15:03:30,728 INFO L226 Difference]: Without dead ends: 2408 [2021-06-05 15:03:30,729 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 612.3ms TimeCoverageRelationStatistics Valid=259, Invalid=1223, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:03:30,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2408 states. [2021-06-05 15:03:30,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2408 to 2312. [2021-06-05 15:03:30,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2312 states, 2311 states have (on average 2.491129381220251) internal successors, (5757), 2311 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 15:03:30,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2312 states to 2312 states and 5757 transitions. [2021-06-05 15:03:30,747 INFO L78 Accepts]: Start accepts. Automaton has 2312 states and 5757 transitions. Word has length 32 [2021-06-05 15:03:30,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:30,747 INFO L482 AbstractCegarLoop]: Abstraction has 2312 states and 5757 transitions. [2021-06-05 15:03:30,747 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:30,747 INFO L276 IsEmpty]: Start isEmpty. Operand 2312 states and 5757 transitions. [2021-06-05 15:03:30,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:03:30,749 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:30,749 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:30,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2739,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:30,949 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:30,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:30,949 INFO L82 PathProgramCache]: Analyzing trace with hash 722342074, now seen corresponding path program 183 times [2021-06-05 15:03:30,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:30,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307369749] [2021-06-05 15:03:30,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:30,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:31,110 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:31,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:31,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307369749] [2021-06-05 15:03:31,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307369749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:31,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311700069] [2021-06-05 15:03:31,110 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 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 15:03:31,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 15:03:31,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:31,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:03:31,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:31,519 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:31,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311700069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:31,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:31,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:03:31,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342592360] [2021-06-05 15:03:31,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:03:31,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:31,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:03:31,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:03:31,520 INFO L87 Difference]: Start difference. First operand 2312 states and 5757 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:32,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:32,039 INFO L93 Difference]: Finished difference Result 2558 states and 6344 transitions. [2021-06-05 15:03:32,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:03:32,039 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:03:32,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:32,041 INFO L225 Difference]: With dead ends: 2558 [2021-06-05 15:03:32,041 INFO L226 Difference]: Without dead ends: 2512 [2021-06-05 15:03:32,041 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 757.5ms TimeCoverageRelationStatistics Valid=274, Invalid=1286, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:03:32,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2512 states. [2021-06-05 15:03:32,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2512 to 2320. [2021-06-05 15:03:32,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2320 states, 2319 states have (on average 2.491159982751186) internal successors, (5777), 2319 states have internal predecessors, (5777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:32,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2320 states to 2320 states and 5777 transitions. [2021-06-05 15:03:32,060 INFO L78 Accepts]: Start accepts. Automaton has 2320 states and 5777 transitions. Word has length 32 [2021-06-05 15:03:32,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:32,060 INFO L482 AbstractCegarLoop]: Abstraction has 2320 states and 5777 transitions. [2021-06-05 15:03:32,060 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:32,060 INFO L276 IsEmpty]: Start isEmpty. Operand 2320 states and 5777 transitions. [2021-06-05 15:03:32,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:03:32,061 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:32,061 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:32,261 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2749,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:32,262 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:32,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:32,262 INFO L82 PathProgramCache]: Analyzing trace with hash -742734722, now seen corresponding path program 184 times [2021-06-05 15:03:32,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:32,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745200595] [2021-06-05 15:03:32,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:32,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:32,396 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:32,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:32,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745200595] [2021-06-05 15:03:32,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745200595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:32,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323005650] [2021-06-05 15:03:32,396 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 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 15:03:32,425 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:03:32,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:32,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:03:32,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:32,799 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:32,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323005650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:32,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:32,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:03:32,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664403799] [2021-06-05 15:03:32,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:03:32,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:32,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:03:32,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:03:32,800 INFO L87 Difference]: Start difference. First operand 2320 states and 5777 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:33,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:33,619 INFO L93 Difference]: Finished difference Result 2502 states and 6212 transitions. [2021-06-05 15:03:33,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:03:33,620 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:03:33,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:33,622 INFO L225 Difference]: With dead ends: 2502 [2021-06-05 15:03:33,622 INFO L226 Difference]: Without dead ends: 2472 [2021-06-05 15:03:33,622 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 981.0ms TimeCoverageRelationStatistics Valid=334, Invalid=1558, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 15:03:33,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2472 states. [2021-06-05 15:03:33,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2472 to 2328. [2021-06-05 15:03:33,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2328 states, 2327 states have (on average 2.4911903738719383) internal successors, (5797), 2327 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 15:03:33,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2328 states to 2328 states and 5797 transitions. [2021-06-05 15:03:33,642 INFO L78 Accepts]: Start accepts. Automaton has 2328 states and 5797 transitions. Word has length 32 [2021-06-05 15:03:33,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:33,642 INFO L482 AbstractCegarLoop]: Abstraction has 2328 states and 5797 transitions. [2021-06-05 15:03:33,642 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:33,642 INFO L276 IsEmpty]: Start isEmpty. Operand 2328 states and 5797 transitions. [2021-06-05 15:03:33,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:03:33,644 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:33,644 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:33,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2774 [2021-06-05 15:03:33,845 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:33,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:33,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1888120646, now seen corresponding path program 185 times [2021-06-05 15:03:33,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:33,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117715935] [2021-06-05 15:03:33,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:33,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:34,084 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:34,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:34,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117715935] [2021-06-05 15:03:34,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117715935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:34,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498565557] [2021-06-05 15:03:34,084 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 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 15:03:34,109 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 15:03:34,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:34,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:03:34,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:34,567 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:34,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498565557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:34,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:34,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:03:34,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723949867] [2021-06-05 15:03:34,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:03:34,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:34,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:03:34,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:03:34,568 INFO L87 Difference]: Start difference. First operand 2328 states and 5797 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:35,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:35,412 INFO L93 Difference]: Finished difference Result 2686 states and 6664 transitions. [2021-06-05 15:03:35,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:03:35,412 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:03:35,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:35,415 INFO L225 Difference]: With dead ends: 2686 [2021-06-05 15:03:35,415 INFO L226 Difference]: Without dead ends: 2640 [2021-06-05 15:03:35,415 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1222.9ms TimeCoverageRelationStatistics Valid=286, Invalid=1436, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 15:03:35,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2640 states. [2021-06-05 15:03:35,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2640 to 2336. [2021-06-05 15:03:35,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2336 states, 2335 states have (on average 2.491220556745182) internal successors, (5817), 2335 states have internal predecessors, (5817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:35,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2336 states to 2336 states and 5817 transitions. [2021-06-05 15:03:35,438 INFO L78 Accepts]: Start accepts. Automaton has 2336 states and 5817 transitions. Word has length 32 [2021-06-05 15:03:35,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:35,438 INFO L482 AbstractCegarLoop]: Abstraction has 2336 states and 5817 transitions. [2021-06-05 15:03:35,438 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:35,438 INFO L276 IsEmpty]: Start isEmpty. Operand 2336 states and 5817 transitions. [2021-06-05 15:03:35,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:03:35,440 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:35,440 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:35,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2789,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:35,640 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:35,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:35,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1880818814, now seen corresponding path program 186 times [2021-06-05 15:03:35,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:35,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808340923] [2021-06-05 15:03:35,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:35,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:35,841 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:35,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:35,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808340923] [2021-06-05 15:03:35,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808340923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:35,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596144521] [2021-06-05 15:03:35,842 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 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 15:03:35,864 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 15:03:35,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:35,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:03:35,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:36,188 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:36,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596144521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:36,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:36,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:03:36,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340055165] [2021-06-05 15:03:36,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:03:36,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:36,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:03:36,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:03:36,188 INFO L87 Difference]: Start difference. First operand 2336 states and 5817 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:36,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:36,644 INFO L93 Difference]: Finished difference Result 2526 states and 6268 transitions. [2021-06-05 15:03:36,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:03:36,645 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:03:36,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:36,647 INFO L225 Difference]: With dead ends: 2526 [2021-06-05 15:03:36,647 INFO L226 Difference]: Without dead ends: 2488 [2021-06-05 15:03:36,647 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 741.0ms TimeCoverageRelationStatistics Valid=216, Invalid=1116, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:03:36,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2488 states. [2021-06-05 15:03:36,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2488 to 2352. [2021-06-05 15:03:36,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2352 states, 2351 states have (on average 2.4912803062526585) internal successors, (5857), 2351 states have internal predecessors, (5857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:36,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2352 states to 2352 states and 5857 transitions. [2021-06-05 15:03:36,667 INFO L78 Accepts]: Start accepts. Automaton has 2352 states and 5857 transitions. Word has length 32 [2021-06-05 15:03:36,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:36,667 INFO L482 AbstractCegarLoop]: Abstraction has 2352 states and 5857 transitions. [2021-06-05 15:03:36,667 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:36,667 INFO L276 IsEmpty]: Start isEmpty. Operand 2352 states and 5857 transitions. [2021-06-05 15:03:36,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:03:36,669 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:36,669 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:36,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2807,195 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:36,869 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:36,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:36,871 INFO L82 PathProgramCache]: Analyzing trace with hash 2068509114, now seen corresponding path program 187 times [2021-06-05 15:03:36,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:36,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674504451] [2021-06-05 15:03:36,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:36,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:37,088 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:37,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:37,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674504451] [2021-06-05 15:03:37,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674504451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:37,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758598956] [2021-06-05 15:03:37,088 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 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 15:03:37,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:37,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:03:37,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:37,584 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:37,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758598956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:37,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:37,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:03:37,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797139414] [2021-06-05 15:03:37,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:03:37,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:37,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:03:37,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:03:37,585 INFO L87 Difference]: Start difference. First operand 2352 states and 5857 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:38,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:38,186 INFO L93 Difference]: Finished difference Result 2718 states and 6744 transitions. [2021-06-05 15:03:38,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:03:38,186 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:03:38,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:38,188 INFO L225 Difference]: With dead ends: 2718 [2021-06-05 15:03:38,188 INFO L226 Difference]: Without dead ends: 2672 [2021-06-05 15:03:38,188 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 1046.6ms TimeCoverageRelationStatistics Valid=270, Invalid=1290, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:03:38,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2672 states. [2021-06-05 15:03:38,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2672 to 2360. [2021-06-05 15:03:38,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2360 states, 2359 states have (on average 2.491309877066554) internal successors, (5877), 2359 states have internal predecessors, (5877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:38,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2360 states to 2360 states and 5877 transitions. [2021-06-05 15:03:38,208 INFO L78 Accepts]: Start accepts. Automaton has 2360 states and 5877 transitions. Word has length 32 [2021-06-05 15:03:38,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:38,208 INFO L482 AbstractCegarLoop]: Abstraction has 2360 states and 5877 transitions. [2021-06-05 15:03:38,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:38,208 INFO L276 IsEmpty]: Start isEmpty. Operand 2360 states and 5877 transitions. [2021-06-05 15:03:38,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:03:38,209 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:38,209 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:38,410 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2823,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:38,410 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:38,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:38,410 INFO L82 PathProgramCache]: Analyzing trace with hash 603432318, now seen corresponding path program 188 times [2021-06-05 15:03:38,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:38,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611676778] [2021-06-05 15:03:38,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:38,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:38,574 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:38,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:38,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611676778] [2021-06-05 15:03:38,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611676778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:38,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034952972] [2021-06-05 15:03:38,575 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 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 15:03:38,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:03:38,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:38,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:03:38,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:38,980 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:38,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034952972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:38,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:38,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:03:38,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581100063] [2021-06-05 15:03:38,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:03:38,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:38,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:03:38,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:03:38,981 INFO L87 Difference]: Start difference. First operand 2360 states and 5877 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:39,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:39,614 INFO L93 Difference]: Finished difference Result 2702 states and 6712 transitions. [2021-06-05 15:03:39,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:03:39,615 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:03:39,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:39,617 INFO L225 Difference]: With dead ends: 2702 [2021-06-05 15:03:39,617 INFO L226 Difference]: Without dead ends: 2672 [2021-06-05 15:03:39,617 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 902.3ms TimeCoverageRelationStatistics Valid=296, Invalid=1426, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 15:03:39,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2672 states. [2021-06-05 15:03:39,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2672 to 2360. [2021-06-05 15:03:39,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2360 states, 2359 states have (on average 2.491309877066554) internal successors, (5877), 2359 states have internal predecessors, (5877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:39,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2360 states to 2360 states and 5877 transitions. [2021-06-05 15:03:39,640 INFO L78 Accepts]: Start accepts. Automaton has 2360 states and 5877 transitions. Word has length 32 [2021-06-05 15:03:39,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:39,640 INFO L482 AbstractCegarLoop]: Abstraction has 2360 states and 5877 transitions. [2021-06-05 15:03:39,640 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:39,640 INFO L276 IsEmpty]: Start isEmpty. Operand 2360 states and 5877 transitions. [2021-06-05 15:03:39,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:03:39,642 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:39,642 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:39,842 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2848 [2021-06-05 15:03:39,842 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:39,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:39,843 INFO L82 PathProgramCache]: Analyzing trace with hash -951315782, now seen corresponding path program 189 times [2021-06-05 15:03:39,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:39,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752669043] [2021-06-05 15:03:39,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:39,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:40,071 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:40,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:40,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752669043] [2021-06-05 15:03:40,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752669043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:40,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101931756] [2021-06-05 15:03:40,072 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 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 15:03:40,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 15:03:40,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:40,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:03:40,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:40,546 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:40,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101931756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:40,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:40,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:03:40,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499689641] [2021-06-05 15:03:40,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:03:40,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:40,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:03:40,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:03:40,547 INFO L87 Difference]: Start difference. First operand 2360 states and 5877 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:41,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:41,143 INFO L93 Difference]: Finished difference Result 2510 states and 6232 transitions. [2021-06-05 15:03:41,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:03:41,143 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:03:41,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:41,145 INFO L225 Difference]: With dead ends: 2510 [2021-06-05 15:03:41,145 INFO L226 Difference]: Without dead ends: 2480 [2021-06-05 15:03:41,145 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 1028.1ms TimeCoverageRelationStatistics Valid=270, Invalid=1212, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:03:41,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2480 states. [2021-06-05 15:03:41,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2480 to 2392. [2021-06-05 15:03:41,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2392 states, 2391 states have (on average 2.491426181514011) internal successors, (5957), 2391 states have internal predecessors, (5957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:41,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2392 states to 2392 states and 5957 transitions. [2021-06-05 15:03:41,164 INFO L78 Accepts]: Start accepts. Automaton has 2392 states and 5957 transitions. Word has length 32 [2021-06-05 15:03:41,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:41,164 INFO L482 AbstractCegarLoop]: Abstraction has 2392 states and 5957 transitions. [2021-06-05 15:03:41,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:41,165 INFO L276 IsEmpty]: Start isEmpty. Operand 2392 states and 5957 transitions. [2021-06-05 15:03:41,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:03:41,166 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:41,166 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:41,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2867 [2021-06-05 15:03:41,367 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:41,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:41,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1878574718, now seen corresponding path program 190 times [2021-06-05 15:03:41,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:41,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865766393] [2021-06-05 15:03:41,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:41,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:41,581 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:41,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:41,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865766393] [2021-06-05 15:03:41,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865766393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:41,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6902306] [2021-06-05 15:03:41,582 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 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 15:03:41,604 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:03:41,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:41,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:03:41,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:41,990 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:41,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6902306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:41,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:41,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:03:41,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438906662] [2021-06-05 15:03:41,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:03:41,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:41,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:03:41,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:03:41,991 INFO L87 Difference]: Start difference. First operand 2392 states and 5957 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:42,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:42,764 INFO L93 Difference]: Finished difference Result 2622 states and 6512 transitions. [2021-06-05 15:03:42,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:03:42,764 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:03:42,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:42,767 INFO L225 Difference]: With dead ends: 2622 [2021-06-05 15:03:42,767 INFO L226 Difference]: Without dead ends: 2592 [2021-06-05 15:03:42,767 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 1092.7ms TimeCoverageRelationStatistics Valid=302, Invalid=1420, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 15:03:42,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2592 states. [2021-06-05 15:03:42,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2592 to 2392. [2021-06-05 15:03:42,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2392 states, 2391 states have (on average 2.491426181514011) internal successors, (5957), 2391 states have internal predecessors, (5957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:42,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2392 states to 2392 states and 5957 transitions. [2021-06-05 15:03:42,787 INFO L78 Accepts]: Start accepts. Automaton has 2392 states and 5957 transitions. Word has length 32 [2021-06-05 15:03:42,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:42,787 INFO L482 AbstractCegarLoop]: Abstraction has 2392 states and 5957 transitions. [2021-06-05 15:03:42,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:42,788 INFO L276 IsEmpty]: Start isEmpty. Operand 2392 states and 5957 transitions. [2021-06-05 15:03:42,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:03:42,789 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:42,789 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:42,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2887,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:42,990 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:42,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:42,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1157254214, now seen corresponding path program 191 times [2021-06-05 15:03:42,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:42,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781209433] [2021-06-05 15:03:42,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:42,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:43,201 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:43,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:43,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781209433] [2021-06-05 15:03:43,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781209433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:43,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922570064] [2021-06-05 15:03:43,202 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 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 15:03:43,224 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 15:03:43,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:43,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:03:43,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:43,602 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:43,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922570064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:43,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:43,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:03:43,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96228513] [2021-06-05 15:03:43,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:03:43,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:43,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:03:43,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:03:43,603 INFO L87 Difference]: Start difference. First operand 2392 states and 5957 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:44,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:44,297 INFO L93 Difference]: Finished difference Result 2710 states and 6692 transitions. [2021-06-05 15:03:44,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:03:44,297 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:03:44,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:44,300 INFO L225 Difference]: With dead ends: 2710 [2021-06-05 15:03:44,300 INFO L226 Difference]: Without dead ends: 2680 [2021-06-05 15:03:44,300 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 1011.7ms TimeCoverageRelationStatistics Valid=332, Invalid=1474, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:03:44,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2680 states. [2021-06-05 15:03:44,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2680 to 2408. [2021-06-05 15:03:44,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2408 states, 2407 states have (on average 2.493144993768176) internal successors, (6001), 2407 states have internal predecessors, (6001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:44,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2408 states to 2408 states and 6001 transitions. [2021-06-05 15:03:44,323 INFO L78 Accepts]: Start accepts. Automaton has 2408 states and 6001 transitions. Word has length 32 [2021-06-05 15:03:44,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:44,323 INFO L482 AbstractCegarLoop]: Abstraction has 2408 states and 6001 transitions. [2021-06-05 15:03:44,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:44,323 INFO L276 IsEmpty]: Start isEmpty. Operand 2408 states and 6001 transitions. [2021-06-05 15:03:44,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:03:44,325 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:44,325 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:44,526 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2907,200 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:44,526 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:44,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:44,526 INFO L82 PathProgramCache]: Analyzing trace with hash -969563914, now seen corresponding path program 192 times [2021-06-05 15:03:44,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:44,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728895331] [2021-06-05 15:03:44,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:44,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:44,663 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:44,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:44,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728895331] [2021-06-05 15:03:44,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728895331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:44,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234377204] [2021-06-05 15:03:44,663 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 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 15:03:44,686 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 15:03:44,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:44,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:03:44,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:45,097 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:45,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234377204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:45,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:45,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:03:45,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515344835] [2021-06-05 15:03:45,097 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:03:45,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:45,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:03:45,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:03:45,097 INFO L87 Difference]: Start difference. First operand 2408 states and 6001 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:45,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:45,649 INFO L93 Difference]: Finished difference Result 2614 states and 6496 transitions. [2021-06-05 15:03:45,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:03:45,650 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:03:45,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:45,652 INFO L225 Difference]: With dead ends: 2614 [2021-06-05 15:03:45,652 INFO L226 Difference]: Without dead ends: 2584 [2021-06-05 15:03:45,652 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 840.4ms TimeCoverageRelationStatistics Valid=233, Invalid=1249, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:03:45,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2584 states. [2021-06-05 15:03:45,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2584 to 2400. [2021-06-05 15:03:45,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2400 states, 2399 states have (on average 2.4931221342225927) internal successors, (5981), 2399 states have internal predecessors, (5981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:45,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2400 states to 2400 states and 5981 transitions. [2021-06-05 15:03:45,671 INFO L78 Accepts]: Start accepts. Automaton has 2400 states and 5981 transitions. Word has length 32 [2021-06-05 15:03:45,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:45,672 INFO L482 AbstractCegarLoop]: Abstraction has 2400 states and 5981 transitions. [2021-06-05 15:03:45,672 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:45,672 INFO L276 IsEmpty]: Start isEmpty. Operand 2400 states and 5981 transitions. [2021-06-05 15:03:45,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:03:45,673 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:45,673 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:45,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2930,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:45,874 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:45,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:45,874 INFO L82 PathProgramCache]: Analyzing trace with hash 422868282, now seen corresponding path program 193 times [2021-06-05 15:03:45,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:45,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453782807] [2021-06-05 15:03:45,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:45,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:46,073 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:46,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:46,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453782807] [2021-06-05 15:03:46,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453782807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:46,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201048834] [2021-06-05 15:03:46,074 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 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 15:03:46,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:46,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:03:46,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:46,565 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:46,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201048834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:46,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:46,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:03:46,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283146001] [2021-06-05 15:03:46,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:03:46,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:46,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:03:46,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:03:46,566 INFO L87 Difference]: Start difference. First operand 2400 states and 5981 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:47,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:47,273 INFO L93 Difference]: Finished difference Result 2670 states and 6632 transitions. [2021-06-05 15:03:47,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:03:47,274 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:03:47,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:47,276 INFO L225 Difference]: With dead ends: 2670 [2021-06-05 15:03:47,276 INFO L226 Difference]: Without dead ends: 2632 [2021-06-05 15:03:47,276 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 1110.6ms TimeCoverageRelationStatistics Valid=267, Invalid=1373, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:03:47,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2632 states. [2021-06-05 15:03:47,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2632 to 2400. [2021-06-05 15:03:47,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2400 states, 2399 states have (on average 2.491454772822009) internal successors, (5977), 2399 states have internal predecessors, (5977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:47,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2400 states to 2400 states and 5977 transitions. [2021-06-05 15:03:47,296 INFO L78 Accepts]: Start accepts. Automaton has 2400 states and 5977 transitions. Word has length 32 [2021-06-05 15:03:47,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:47,296 INFO L482 AbstractCegarLoop]: Abstraction has 2400 states and 5977 transitions. [2021-06-05 15:03:47,296 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:47,296 INFO L276 IsEmpty]: Start isEmpty. Operand 2400 states and 5977 transitions. [2021-06-05 15:03:47,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:03:47,298 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:47,298 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:47,498 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2950 [2021-06-05 15:03:47,498 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:47,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:47,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1307901450, now seen corresponding path program 194 times [2021-06-05 15:03:47,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:47,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638853842] [2021-06-05 15:03:47,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:47,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:47,714 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:47,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:47,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638853842] [2021-06-05 15:03:47,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638853842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:47,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744705514] [2021-06-05 15:03:47,714 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 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 15:03:47,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:03:47,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:47,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:03:47,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:48,181 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:48,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744705514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:48,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:48,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:03:48,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156289994] [2021-06-05 15:03:48,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:03:48,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:48,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:03:48,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:03:48,181 INFO L87 Difference]: Start difference. First operand 2400 states and 5977 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:48,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:48,938 INFO L93 Difference]: Finished difference Result 2566 states and 6376 transitions. [2021-06-05 15:03:48,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:03:48,939 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:03:48,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:48,941 INFO L225 Difference]: With dead ends: 2566 [2021-06-05 15:03:48,941 INFO L226 Difference]: Without dead ends: 2544 [2021-06-05 15:03:48,941 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 1087.5ms TimeCoverageRelationStatistics Valid=235, Invalid=1405, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:03:48,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2544 states. [2021-06-05 15:03:48,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2544 to 2392. [2021-06-05 15:03:48,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2392 states, 2391 states have (on average 2.491426181514011) internal successors, (5957), 2391 states have internal predecessors, (5957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:48,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2392 states to 2392 states and 5957 transitions. [2021-06-05 15:03:48,962 INFO L78 Accepts]: Start accepts. Automaton has 2392 states and 5957 transitions. Word has length 32 [2021-06-05 15:03:48,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:48,962 INFO L482 AbstractCegarLoop]: Abstraction has 2392 states and 5957 transitions. [2021-06-05 15:03:48,962 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:48,962 INFO L276 IsEmpty]: Start isEmpty. Operand 2392 states and 5957 transitions. [2021-06-05 15:03:48,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:03:48,964 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:48,964 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:49,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2974,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:49,180 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:49,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:49,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1176193470, now seen corresponding path program 195 times [2021-06-05 15:03:49,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:49,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826894760] [2021-06-05 15:03:49,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:49,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:49,347 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:49,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:49,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826894760] [2021-06-05 15:03:49,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826894760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:49,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261168716] [2021-06-05 15:03:49,348 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 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 15:03:49,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 15:03:49,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:49,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:03:49,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:49,732 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:49,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261168716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:49,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:49,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:03:49,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719191413] [2021-06-05 15:03:49,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:03:49,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:49,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:03:49,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:03:49,733 INFO L87 Difference]: Start difference. First operand 2392 states and 5957 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:50,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:50,695 INFO L93 Difference]: Finished difference Result 2526 states and 6272 transitions. [2021-06-05 15:03:50,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:03:50,695 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:03:50,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:50,697 INFO L225 Difference]: With dead ends: 2526 [2021-06-05 15:03:50,697 INFO L226 Difference]: Without dead ends: 2496 [2021-06-05 15:03:50,698 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 1216.2ms TimeCoverageRelationStatistics Valid=377, Invalid=1603, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 15:03:50,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2496 states. [2021-06-05 15:03:50,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2496 to 2400. [2021-06-05 15:03:50,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2400 states, 2399 states have (on average 2.491454772822009) internal successors, (5977), 2399 states have internal predecessors, (5977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:50,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2400 states to 2400 states and 5977 transitions. [2021-06-05 15:03:50,717 INFO L78 Accepts]: Start accepts. Automaton has 2400 states and 5977 transitions. Word has length 32 [2021-06-05 15:03:50,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:50,717 INFO L482 AbstractCegarLoop]: Abstraction has 2400 states and 5977 transitions. [2021-06-05 15:03:50,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:50,717 INFO L276 IsEmpty]: Start isEmpty. Operand 2400 states and 5977 transitions. [2021-06-05 15:03:50,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:03:50,719 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:50,719 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:50,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2994 [2021-06-05 15:03:50,934 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:50,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:50,935 INFO L82 PathProgramCache]: Analyzing trace with hash -988503170, now seen corresponding path program 196 times [2021-06-05 15:03:50,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:50,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458180024] [2021-06-05 15:03:50,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:50,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:51,193 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:51,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:51,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458180024] [2021-06-05 15:03:51,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458180024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:51,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138388240] [2021-06-05 15:03:51,193 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 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 15:03:51,216 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:03:51,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:51,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:03:51,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:51,647 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:51,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138388240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:51,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:51,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:03:51,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311391535] [2021-06-05 15:03:51,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:03:51,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:51,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:03:51,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:03:51,648 INFO L87 Difference]: Start difference. First operand 2400 states and 5977 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:52,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:52,380 INFO L93 Difference]: Finished difference Result 2534 states and 6292 transitions. [2021-06-05 15:03:52,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:03:52,380 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:03:52,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:52,383 INFO L225 Difference]: With dead ends: 2534 [2021-06-05 15:03:52,383 INFO L226 Difference]: Without dead ends: 2504 [2021-06-05 15:03:52,383 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 1095.9ms TimeCoverageRelationStatistics Valid=265, Invalid=1541, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:03:52,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2504 states. [2021-06-05 15:03:52,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2504 to 2392. [2021-06-05 15:03:52,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2392 states, 2391 states have (on average 2.491426181514011) internal successors, (5957), 2391 states have internal predecessors, (5957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:52,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2392 states to 2392 states and 5957 transitions. [2021-06-05 15:03:52,403 INFO L78 Accepts]: Start accepts. Automaton has 2392 states and 5957 transitions. Word has length 32 [2021-06-05 15:03:52,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:52,403 INFO L482 AbstractCegarLoop]: Abstraction has 2392 states and 5957 transitions. [2021-06-05 15:03:52,403 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:52,403 INFO L276 IsEmpty]: Start isEmpty. Operand 2392 states and 5957 transitions. [2021-06-05 15:03:52,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:03:52,405 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:52,405 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:52,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3007,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:52,605 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:52,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:52,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1534490562, now seen corresponding path program 197 times [2021-06-05 15:03:52,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:52,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009278343] [2021-06-05 15:03:52,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:52,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:52,873 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:52,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:52,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009278343] [2021-06-05 15:03:52,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009278343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:52,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336036445] [2021-06-05 15:03:52,873 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 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 15:03:52,897 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 15:03:52,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:52,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:03:52,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:53,239 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:53,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336036445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:53,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:53,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:03:53,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218156604] [2021-06-05 15:03:53,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:03:53,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:53,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:03:53,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:03:53,240 INFO L87 Difference]: Start difference. First operand 2392 states and 5957 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:54,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:54,010 INFO L93 Difference]: Finished difference Result 2646 states and 6572 transitions. [2021-06-05 15:03:54,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:03:54,010 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:03:54,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:54,012 INFO L225 Difference]: With dead ends: 2646 [2021-06-05 15:03:54,012 INFO L226 Difference]: Without dead ends: 2616 [2021-06-05 15:03:54,013 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 983.5ms TimeCoverageRelationStatistics Valid=380, Invalid=1600, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 15:03:54,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2616 states. [2021-06-05 15:03:54,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2616 to 2408. [2021-06-05 15:03:54,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2408 states, 2407 states have (on average 2.4914831740756127) internal successors, (5997), 2407 states have internal predecessors, (5997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:54,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2408 states to 2408 states and 5997 transitions. [2021-06-05 15:03:54,033 INFO L78 Accepts]: Start accepts. Automaton has 2408 states and 5997 transitions. Word has length 32 [2021-06-05 15:03:54,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:54,033 INFO L482 AbstractCegarLoop]: Abstraction has 2408 states and 5997 transitions. [2021-06-05 15:03:54,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:54,033 INFO L276 IsEmpty]: Start isEmpty. Operand 2408 states and 5997 transitions. [2021-06-05 15:03:54,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:03:54,035 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:54,035 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:54,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3024,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:54,235 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:54,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:54,235 INFO L82 PathProgramCache]: Analyzing trace with hash -1532779138, now seen corresponding path program 198 times [2021-06-05 15:03:54,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:54,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457435978] [2021-06-05 15:03:54,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:54,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:54,409 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:54,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:54,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457435978] [2021-06-05 15:03:54,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457435978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:54,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775747214] [2021-06-05 15:03:54,409 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 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 15:03:54,432 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:03:54,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:54,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:03:54,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:54,772 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:54,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775747214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:54,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:54,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:03:54,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468644039] [2021-06-05 15:03:54,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:03:54,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:54,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:03:54,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:03:54,773 INFO L87 Difference]: Start difference. First operand 2408 states and 5997 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:55,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:55,200 INFO L93 Difference]: Finished difference Result 2590 states and 6428 transitions. [2021-06-05 15:03:55,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 15:03:55,200 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:03:55,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:55,203 INFO L225 Difference]: With dead ends: 2590 [2021-06-05 15:03:55,203 INFO L226 Difference]: Without dead ends: 2552 [2021-06-05 15:03:55,203 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 688.0ms TimeCoverageRelationStatistics Valid=197, Invalid=1063, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:03:55,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2552 states. [2021-06-05 15:03:55,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2552 to 2416. [2021-06-05 15:03:55,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2416 states, 2415 states have (on average 2.4915113871635612) internal successors, (6017), 2415 states have internal predecessors, (6017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:55,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2416 states to 2416 states and 6017 transitions. [2021-06-05 15:03:55,222 INFO L78 Accepts]: Start accepts. Automaton has 2416 states and 6017 transitions. Word has length 32 [2021-06-05 15:03:55,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:55,222 INFO L482 AbstractCegarLoop]: Abstraction has 2416 states and 6017 transitions. [2021-06-05 15:03:55,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:55,223 INFO L276 IsEmpty]: Start isEmpty. Operand 2416 states and 6017 transitions. [2021-06-05 15:03:55,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:03:55,224 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:55,224 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:55,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3044 [2021-06-05 15:03:55,425 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:55,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:55,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1345088838, now seen corresponding path program 199 times [2021-06-05 15:03:55,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:55,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551468426] [2021-06-05 15:03:55,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:55,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:55,643 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:55,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:55,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551468426] [2021-06-05 15:03:55,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551468426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:55,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132047329] [2021-06-05 15:03:55,643 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 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 15:03:55,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:55,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:03:55,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:56,091 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:56,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132047329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:56,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:56,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:03:56,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945034910] [2021-06-05 15:03:56,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:03:56,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:56,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:03:56,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:03:56,091 INFO L87 Difference]: Start difference. First operand 2416 states and 6017 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:56,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:56,752 INFO L93 Difference]: Finished difference Result 2774 states and 6892 transitions. [2021-06-05 15:03:56,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:03:56,753 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:03:56,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:56,755 INFO L225 Difference]: With dead ends: 2774 [2021-06-05 15:03:56,755 INFO L226 Difference]: Without dead ends: 2736 [2021-06-05 15:03:56,755 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 1028.2ms TimeCoverageRelationStatistics Valid=255, Invalid=1305, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:03:56,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2736 states. [2021-06-05 15:03:56,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2736 to 2416. [2021-06-05 15:03:56,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2416 states, 2415 states have (on average 2.4915113871635612) internal successors, (6017), 2415 states have internal predecessors, (6017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:56,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2416 states to 2416 states and 6017 transitions. [2021-06-05 15:03:56,778 INFO L78 Accepts]: Start accepts. Automaton has 2416 states and 6017 transitions. Word has length 32 [2021-06-05 15:03:56,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:56,778 INFO L482 AbstractCegarLoop]: Abstraction has 2416 states and 6017 transitions. [2021-06-05 15:03:56,778 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:56,779 INFO L276 IsEmpty]: Start isEmpty. Operand 2416 states and 6017 transitions. [2021-06-05 15:03:56,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:03:56,780 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:56,780 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:56,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3058,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:56,981 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:56,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:56,981 INFO L82 PathProgramCache]: Analyzing trace with hash -69946438, now seen corresponding path program 200 times [2021-06-05 15:03:56,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:56,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333549328] [2021-06-05 15:03:56,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:56,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:57,169 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:57,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:57,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333549328] [2021-06-05 15:03:57,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333549328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:57,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75097957] [2021-06-05 15:03:57,170 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 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 15:03:57,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:03:57,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:57,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:03:57,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:57,652 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:57,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75097957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:57,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:57,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:03:57,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42493078] [2021-06-05 15:03:57,652 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:03:57,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:57,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:03:57,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:03:57,653 INFO L87 Difference]: Start difference. First operand 2416 states and 6017 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:58,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:58,440 INFO L93 Difference]: Finished difference Result 2622 states and 6516 transitions. [2021-06-05 15:03:58,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:03:58,440 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:03:58,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:58,442 INFO L225 Difference]: With dead ends: 2622 [2021-06-05 15:03:58,442 INFO L226 Difference]: Without dead ends: 2600 [2021-06-05 15:03:58,442 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 1154.1ms TimeCoverageRelationStatistics Valid=302, Invalid=1504, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:03:58,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2600 states. [2021-06-05 15:03:58,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2600 to 2440. [2021-06-05 15:03:58,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2440 states, 2439 states have (on average 2.4915949159491593) internal successors, (6077), 2439 states have internal predecessors, (6077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:58,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2440 states to 2440 states and 6077 transitions. [2021-06-05 15:03:58,462 INFO L78 Accepts]: Start accepts. Automaton has 2440 states and 6077 transitions. Word has length 32 [2021-06-05 15:03:58,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:58,462 INFO L482 AbstractCegarLoop]: Abstraction has 2440 states and 6077 transitions. [2021-06-05 15:03:58,462 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:58,462 INFO L276 IsEmpty]: Start isEmpty. Operand 2440 states and 6077 transitions. [2021-06-05 15:03:58,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:03:58,464 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:58,464 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:58,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3073 [2021-06-05 15:03:58,664 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:58,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:58,664 INFO L82 PathProgramCache]: Analyzing trace with hash -1535023234, now seen corresponding path program 201 times [2021-06-05 15:03:58,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:58,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325143424] [2021-06-05 15:03:58,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:58,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:58,881 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:58,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:58,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325143424] [2021-06-05 15:03:58,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325143424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:58,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588583717] [2021-06-05 15:03:58,882 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 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 15:03:58,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 15:03:58,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:58,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:03:58,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:59,296 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:59,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588583717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:59,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:59,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:03:59,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156395067] [2021-06-05 15:03:59,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:03:59,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:59,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:03:59,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:03:59,297 INFO L87 Difference]: Start difference. First operand 2440 states and 6077 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:00,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:00,125 INFO L93 Difference]: Finished difference Result 2718 states and 6752 transitions. [2021-06-05 15:04:00,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:04:00,126 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:04:00,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:00,128 INFO L225 Difference]: With dead ends: 2718 [2021-06-05 15:04:00,128 INFO L226 Difference]: Without dead ends: 2688 [2021-06-05 15:04:00,128 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 1145.8ms TimeCoverageRelationStatistics Valid=325, Invalid=1567, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 15:04:00,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2688 states. [2021-06-05 15:04:00,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2688 to 2448. [2021-06-05 15:04:00,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2448 states, 2447 states have (on average 2.491622394769105) internal successors, (6097), 2447 states have internal predecessors, (6097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:00,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2448 states to 2448 states and 6097 transitions. [2021-06-05 15:04:00,149 INFO L78 Accepts]: Start accepts. Automaton has 2448 states and 6097 transitions. Word has length 32 [2021-06-05 15:04:00,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:00,149 INFO L482 AbstractCegarLoop]: Abstraction has 2448 states and 6097 transitions. [2021-06-05 15:04:00,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:00,149 INFO L276 IsEmpty]: Start isEmpty. Operand 2448 states and 6097 transitions. [2021-06-05 15:04:00,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:04:00,150 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:00,151 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:00,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3096 [2021-06-05 15:04:00,351 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:00,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:00,351 INFO L82 PathProgramCache]: Analyzing trace with hash -275884870, now seen corresponding path program 202 times [2021-06-05 15:04:00,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:00,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872687649] [2021-06-05 15:04:00,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:00,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:00,579 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:00,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:00,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872687649] [2021-06-05 15:04:00,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872687649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:00,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711021433] [2021-06-05 15:04:00,580 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 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 15:04:00,603 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:04:00,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:00,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:04:00,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:00,975 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:00,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711021433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:00,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:00,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:04:00,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217757334] [2021-06-05 15:04:00,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:04:00,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:00,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:04:00,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:04:00,976 INFO L87 Difference]: Start difference. First operand 2448 states and 6097 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:01,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:01,621 INFO L93 Difference]: Finished difference Result 2742 states and 6812 transitions. [2021-06-05 15:04:01,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:04:01,621 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:04:01,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:01,623 INFO L225 Difference]: With dead ends: 2742 [2021-06-05 15:04:01,623 INFO L226 Difference]: Without dead ends: 2712 [2021-06-05 15:04:01,623 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 971.7ms TimeCoverageRelationStatistics Valid=304, Invalid=1418, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 15:04:01,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2712 states. [2021-06-05 15:04:01,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2712 to 2456. [2021-06-05 15:04:01,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2456 states, 2455 states have (on average 2.4916496945010183) internal successors, (6117), 2455 states have internal predecessors, (6117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:01,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2456 states to 2456 states and 6117 transitions. [2021-06-05 15:04:01,643 INFO L78 Accepts]: Start accepts. Automaton has 2456 states and 6117 transitions. Word has length 32 [2021-06-05 15:04:01,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:01,643 INFO L482 AbstractCegarLoop]: Abstraction has 2456 states and 6117 transitions. [2021-06-05 15:04:01,643 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:01,643 INFO L276 IsEmpty]: Start isEmpty. Operand 2456 states and 6117 transitions. [2021-06-05 15:04:01,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:04:01,644 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:01,644 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:01,845 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 211 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3111 [2021-06-05 15:04:01,845 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:01,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:01,845 INFO L82 PathProgramCache]: Analyzing trace with hash -88194570, now seen corresponding path program 203 times [2021-06-05 15:04:01,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:01,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437954942] [2021-06-05 15:04:01,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:01,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:01,998 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:01,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:01,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437954942] [2021-06-05 15:04:01,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437954942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:01,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312647364] [2021-06-05 15:04:01,998 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 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 15:04:02,021 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 15:04:02,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:02,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 15:04:02,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:02,335 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:02,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312647364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:02,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:02,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:04:02,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937125454] [2021-06-05 15:04:02,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:04:02,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:02,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:04:02,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:04:02,336 INFO L87 Difference]: Start difference. First operand 2456 states and 6117 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:02,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:02,778 INFO L93 Difference]: Finished difference Result 2710 states and 6732 transitions. [2021-06-05 15:04:02,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:04:02,778 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:04:02,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:02,780 INFO L225 Difference]: With dead ends: 2710 [2021-06-05 15:04:02,780 INFO L226 Difference]: Without dead ends: 2680 [2021-06-05 15:04:02,781 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 670.0ms TimeCoverageRelationStatistics Valid=234, Invalid=1248, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:04:02,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2680 states. [2021-06-05 15:04:02,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2680 to 2424. [2021-06-05 15:04:02,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2424 states, 2423 states have (on average 2.491539413949649) internal successors, (6037), 2423 states have internal predecessors, (6037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:02,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2424 states to 2424 states and 6037 transitions. [2021-06-05 15:04:02,804 INFO L78 Accepts]: Start accepts. Automaton has 2424 states and 6037 transitions. Word has length 32 [2021-06-05 15:04:02,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:02,804 INFO L482 AbstractCegarLoop]: Abstraction has 2424 states and 6037 transitions. [2021-06-05 15:04:02,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:02,804 INFO L276 IsEmpty]: Start isEmpty. Operand 2424 states and 6037 transitions. [2021-06-05 15:04:02,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:04:02,806 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:02,806 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:03,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3128,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:03,006 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:03,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:03,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1304237626, now seen corresponding path program 204 times [2021-06-05 15:04:03,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:03,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330407228] [2021-06-05 15:04:03,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:03,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:03,202 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:03,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:03,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330407228] [2021-06-05 15:04:03,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330407228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:03,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196743289] [2021-06-05 15:04:03,202 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 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 15:04:03,225 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 15:04:03,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:03,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:04:03,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:03,714 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:03,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196743289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:03,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:03,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:04:03,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397381254] [2021-06-05 15:04:03,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:04:03,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:03,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:04:03,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:04:03,715 INFO L87 Difference]: Start difference. First operand 2424 states and 6037 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:04,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:04,497 INFO L93 Difference]: Finished difference Result 2798 states and 6948 transitions. [2021-06-05 15:04:04,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:04:04,497 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:04:04,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:04,500 INFO L225 Difference]: With dead ends: 2798 [2021-06-05 15:04:04,500 INFO L226 Difference]: Without dead ends: 2760 [2021-06-05 15:04:04,500 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 1191.7ms TimeCoverageRelationStatistics Valid=295, Invalid=1511, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:04:04,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2760 states. [2021-06-05 15:04:04,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2760 to 2432. [2021-06-05 15:04:04,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2432 states, 2431 states have (on average 2.4915672562731386) internal successors, (6057), 2431 states have internal predecessors, (6057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:04,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2432 states to 2432 states and 6057 transitions. [2021-06-05 15:04:04,523 INFO L78 Accepts]: Start accepts. Automaton has 2432 states and 6057 transitions. Word has length 32 [2021-06-05 15:04:04,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:04,523 INFO L482 AbstractCegarLoop]: Abstraction has 2432 states and 6057 transitions. [2021-06-05 15:04:04,523 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:04,523 INFO L276 IsEmpty]: Start isEmpty. Operand 2432 states and 6057 transitions. [2021-06-05 15:04:04,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:04:04,525 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:04,525 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:04,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3143,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:04,733 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:04,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:04,733 INFO L82 PathProgramCache]: Analyzing trace with hash -426532106, now seen corresponding path program 205 times [2021-06-05 15:04:04,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:04,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426129342] [2021-06-05 15:04:04,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:04,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:04,951 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:04,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:04,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426129342] [2021-06-05 15:04:04,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426129342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:04,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890957340] [2021-06-05 15:04:04,951 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 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 15:04:04,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:04,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:04:04,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:05,420 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:05,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890957340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:05,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:05,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:04:05,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557799059] [2021-06-05 15:04:05,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:04:05,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:05,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:04:05,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:04:05,421 INFO L87 Difference]: Start difference. First operand 2432 states and 6057 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:06,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:06,123 INFO L93 Difference]: Finished difference Result 2662 states and 6616 transitions. [2021-06-05 15:04:06,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:04:06,124 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:04:06,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:06,126 INFO L225 Difference]: With dead ends: 2662 [2021-06-05 15:04:06,126 INFO L226 Difference]: Without dead ends: 2640 [2021-06-05 15:04:06,127 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 1089.8ms TimeCoverageRelationStatistics Valid=246, Invalid=1476, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 15:04:06,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2640 states. [2021-06-05 15:04:06,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2640 to 2424. [2021-06-05 15:04:06,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2424 states, 2423 states have (on average 2.491539413949649) internal successors, (6037), 2423 states have internal predecessors, (6037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:06,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2424 states to 2424 states and 6037 transitions. [2021-06-05 15:04:06,147 INFO L78 Accepts]: Start accepts. Automaton has 2424 states and 6037 transitions. Word has length 32 [2021-06-05 15:04:06,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:06,147 INFO L482 AbstractCegarLoop]: Abstraction has 2424 states and 6037 transitions. [2021-06-05 15:04:06,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:06,148 INFO L276 IsEmpty]: Start isEmpty. Operand 2424 states and 6037 transitions. [2021-06-05 15:04:06,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:04:06,149 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:06,149 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:06,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3161 [2021-06-05 15:04:06,350 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:06,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:06,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1644562630, now seen corresponding path program 206 times [2021-06-05 15:04:06,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:06,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144593043] [2021-06-05 15:04:06,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:06,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:06,751 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 17 [2021-06-05 15:04:07,001 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 10 [2021-06-05 15:04:07,059 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:07,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:07,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144593043] [2021-06-05 15:04:07,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144593043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:07,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026264453] [2021-06-05 15:04:07,059 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 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 15:04:07,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:04:07,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:07,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:04:07,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:07,519 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:07,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026264453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:07,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:07,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:04:07,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107553805] [2021-06-05 15:04:07,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:04:07,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:07,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:04:07,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:04:07,520 INFO L87 Difference]: Start difference. First operand 2424 states and 6037 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:08,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:08,175 INFO L93 Difference]: Finished difference Result 2742 states and 6808 transitions. [2021-06-05 15:04:08,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:04:08,175 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:04:08,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:08,177 INFO L225 Difference]: With dead ends: 2742 [2021-06-05 15:04:08,177 INFO L226 Difference]: Without dead ends: 2704 [2021-06-05 15:04:08,177 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 952.8ms TimeCoverageRelationStatistics Valid=284, Invalid=1438, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 15:04:08,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2704 states. [2021-06-05 15:04:08,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2704 to 2424. [2021-06-05 15:04:08,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2424 states, 2423 states have (on average 2.491539413949649) internal successors, (6037), 2423 states have internal predecessors, (6037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:08,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2424 states to 2424 states and 6037 transitions. [2021-06-05 15:04:08,199 INFO L78 Accepts]: Start accepts. Automaton has 2424 states and 6037 transitions. Word has length 32 [2021-06-05 15:04:08,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:08,199 INFO L482 AbstractCegarLoop]: Abstraction has 2424 states and 6037 transitions. [2021-06-05 15:04:08,199 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:08,200 INFO L276 IsEmpty]: Start isEmpty. Operand 2424 states and 6037 transitions. [2021-06-05 15:04:08,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:04:08,201 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:08,201 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:08,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3179,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:08,402 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:08,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:08,402 INFO L82 PathProgramCache]: Analyzing trace with hash -369420230, now seen corresponding path program 207 times [2021-06-05 15:04:08,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:08,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574871164] [2021-06-05 15:04:08,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:08,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:08,538 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:08,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:08,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574871164] [2021-06-05 15:04:08,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574871164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:08,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014665346] [2021-06-05 15:04:08,538 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 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 15:04:08,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 15:04:08,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:08,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:04:08,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:08,924 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:08,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014665346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:08,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:08,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:04:08,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962142216] [2021-06-05 15:04:08,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:04:08,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:08,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:04:08,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:04:08,925 INFO L87 Difference]: Start difference. First operand 2424 states and 6037 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:09,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:09,513 INFO L93 Difference]: Finished difference Result 2678 states and 6644 transitions. [2021-06-05 15:04:09,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:04:09,513 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:04:09,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:09,516 INFO L225 Difference]: With dead ends: 2678 [2021-06-05 15:04:09,516 INFO L226 Difference]: Without dead ends: 2632 [2021-06-05 15:04:09,516 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 839.2ms TimeCoverageRelationStatistics Valid=295, Invalid=1427, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 15:04:09,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2632 states. [2021-06-05 15:04:09,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2632 to 2456. [2021-06-05 15:04:09,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2456 states, 2455 states have (on average 2.4916496945010183) internal successors, (6117), 2455 states have internal predecessors, (6117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:09,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2456 states to 2456 states and 6117 transitions. [2021-06-05 15:04:09,537 INFO L78 Accepts]: Start accepts. Automaton has 2456 states and 6117 transitions. Word has length 32 [2021-06-05 15:04:09,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:09,537 INFO L482 AbstractCegarLoop]: Abstraction has 2456 states and 6117 transitions. [2021-06-05 15:04:09,537 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:09,537 INFO L276 IsEmpty]: Start isEmpty. Operand 2456 states and 6117 transitions. [2021-06-05 15:04:09,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:04:09,539 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:09,539 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:09,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3198 [2021-06-05 15:04:09,739 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:09,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:09,740 INFO L82 PathProgramCache]: Analyzing trace with hash -2100189962, now seen corresponding path program 208 times [2021-06-05 15:04:09,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:09,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087283865] [2021-06-05 15:04:09,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:09,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:09,885 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:09,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:09,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087283865] [2021-06-05 15:04:09,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087283865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:09,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126326441] [2021-06-05 15:04:09,885 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 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 15:04:09,907 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:04:09,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:09,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:04:09,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:10,273 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:10,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126326441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:10,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:10,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:04:10,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820627513] [2021-06-05 15:04:10,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:04:10,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:10,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:04:10,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:04:10,274 INFO L87 Difference]: Start difference. First operand 2456 states and 6117 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:10,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:10,776 INFO L93 Difference]: Finished difference Result 2646 states and 6576 transitions. [2021-06-05 15:04:10,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:04:10,776 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:04:10,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:10,778 INFO L225 Difference]: With dead ends: 2646 [2021-06-05 15:04:10,778 INFO L226 Difference]: Without dead ends: 2624 [2021-06-05 15:04:10,779 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 772.9ms TimeCoverageRelationStatistics Valid=245, Invalid=1395, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:04:10,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2624 states. [2021-06-05 15:04:10,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2624 to 2448. [2021-06-05 15:04:10,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2448 states, 2447 states have (on average 2.491622394769105) internal successors, (6097), 2447 states have internal predecessors, (6097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:10,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2448 states to 2448 states and 6097 transitions. [2021-06-05 15:04:10,799 INFO L78 Accepts]: Start accepts. Automaton has 2448 states and 6097 transitions. Word has length 32 [2021-06-05 15:04:10,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:10,799 INFO L482 AbstractCegarLoop]: Abstraction has 2448 states and 6097 transitions. [2021-06-05 15:04:10,799 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:10,799 INFO L276 IsEmpty]: Start isEmpty. Operand 2448 states and 6097 transitions. [2021-06-05 15:04:10,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:04:10,800 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:10,801 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:11,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3211,217 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:11,001 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:11,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:11,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1988838902, now seen corresponding path program 209 times [2021-06-05 15:04:11,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:11,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803348998] [2021-06-05 15:04:11,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:11,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:11,159 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:11,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:11,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803348998] [2021-06-05 15:04:11,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803348998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:11,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378273485] [2021-06-05 15:04:11,159 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 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 15:04:11,183 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 15:04:11,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:11,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:04:11,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:11,501 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:11,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378273485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:11,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:11,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:04:11,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816145608] [2021-06-05 15:04:11,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:04:11,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:11,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:04:11,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:04:11,502 INFO L87 Difference]: Start difference. First operand 2448 states and 6097 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:11,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:11,975 INFO L93 Difference]: Finished difference Result 2702 states and 6708 transitions. [2021-06-05 15:04:11,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:04:11,976 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:04:11,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:11,978 INFO L225 Difference]: With dead ends: 2702 [2021-06-05 15:04:11,978 INFO L226 Difference]: Without dead ends: 2664 [2021-06-05 15:04:11,979 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 695.1ms TimeCoverageRelationStatistics Valid=238, Invalid=1402, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:04:11,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2664 states. [2021-06-05 15:04:11,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2664 to 2456. [2021-06-05 15:04:11,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2456 states, 2455 states have (on average 2.4916496945010183) internal successors, (6117), 2455 states have internal predecessors, (6117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:11,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2456 states to 2456 states and 6117 transitions. [2021-06-05 15:04:11,999 INFO L78 Accepts]: Start accepts. Automaton has 2456 states and 6117 transitions. Word has length 32 [2021-06-05 15:04:11,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:11,999 INFO L482 AbstractCegarLoop]: Abstraction has 2456 states and 6117 transitions. [2021-06-05 15:04:11,999 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:11,999 INFO L276 IsEmpty]: Start isEmpty. Operand 2456 states and 6117 transitions. [2021-06-05 15:04:12,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:04:12,000 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:12,001 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:12,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3227,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:12,201 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:12,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:12,201 INFO L82 PathProgramCache]: Analyzing trace with hash -2118438094, now seen corresponding path program 210 times [2021-06-05 15:04:12,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:12,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516575191] [2021-06-05 15:04:12,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:12,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:12,408 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:12,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:12,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516575191] [2021-06-05 15:04:12,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516575191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:12,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101535355] [2021-06-05 15:04:12,408 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 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 15:04:12,432 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 15:04:12,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:12,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:04:12,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:12,813 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:12,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101535355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:12,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:12,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:04:12,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676835140] [2021-06-05 15:04:12,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:04:12,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:12,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:04:12,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:04:12,814 INFO L87 Difference]: Start difference. First operand 2456 states and 6117 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:13,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:13,419 INFO L93 Difference]: Finished difference Result 2718 states and 6744 transitions. [2021-06-05 15:04:13,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:04:13,420 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:04:13,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:13,422 INFO L225 Difference]: With dead ends: 2718 [2021-06-05 15:04:13,422 INFO L226 Difference]: Without dead ends: 2672 [2021-06-05 15:04:13,423 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 941.5ms TimeCoverageRelationStatistics Valid=268, Invalid=1372, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:04:13,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2672 states. [2021-06-05 15:04:13,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2672 to 2448. [2021-06-05 15:04:13,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2448 states, 2447 states have (on average 2.491622394769105) internal successors, (6097), 2447 states have internal predecessors, (6097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:13,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2448 states to 2448 states and 6097 transitions. [2021-06-05 15:04:13,459 INFO L78 Accepts]: Start accepts. Automaton has 2448 states and 6097 transitions. Word has length 32 [2021-06-05 15:04:13,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:13,459 INFO L482 AbstractCegarLoop]: Abstraction has 2448 states and 6097 transitions. [2021-06-05 15:04:13,459 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:13,459 INFO L276 IsEmpty]: Start isEmpty. Operand 2448 states and 6097 transitions. [2021-06-05 15:04:13,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:04:13,461 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:13,461 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:13,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3246 [2021-06-05 15:04:13,661 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:13,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:13,662 INFO L82 PathProgramCache]: Analyzing trace with hash 373114870, now seen corresponding path program 211 times [2021-06-05 15:04:13,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:13,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30903638] [2021-06-05 15:04:13,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:13,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:13,791 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:13,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:13,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30903638] [2021-06-05 15:04:13,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30903638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:13,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050368479] [2021-06-05 15:04:13,792 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 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 15:04:13,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:13,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:04:13,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:14,117 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:14,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050368479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:14,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:14,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:04:14,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173279549] [2021-06-05 15:04:14,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:04:14,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:14,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:04:14,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:04:14,118 INFO L87 Difference]: Start difference. First operand 2448 states and 6097 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:14,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:14,634 INFO L93 Difference]: Finished difference Result 2606 states and 6468 transitions. [2021-06-05 15:04:14,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:04:14,634 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:04:14,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:14,636 INFO L225 Difference]: With dead ends: 2606 [2021-06-05 15:04:14,636 INFO L226 Difference]: Without dead ends: 2568 [2021-06-05 15:04:14,637 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 720.5ms TimeCoverageRelationStatistics Valid=304, Invalid=1256, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:04:14,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2568 states. [2021-06-05 15:04:14,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2568 to 2448. [2021-06-05 15:04:14,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2448 states, 2447 states have (on average 2.491622394769105) internal successors, (6097), 2447 states have internal predecessors, (6097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:14,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2448 states to 2448 states and 6097 transitions. [2021-06-05 15:04:14,659 INFO L78 Accepts]: Start accepts. Automaton has 2448 states and 6097 transitions. Word has length 32 [2021-06-05 15:04:14,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:14,659 INFO L482 AbstractCegarLoop]: Abstraction has 2448 states and 6097 transitions. [2021-06-05 15:04:14,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:14,659 INFO L276 IsEmpty]: Start isEmpty. Operand 2448 states and 6097 transitions. [2021-06-05 15:04:14,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:04:14,661 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:14,661 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:14,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3264 [2021-06-05 15:04:14,861 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:14,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:14,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1629648834, now seen corresponding path program 212 times [2021-06-05 15:04:14,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:14,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376337447] [2021-06-05 15:04:14,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:14,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:15,438 WARN L205 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 17 [2021-06-05 15:04:15,638 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 19 [2021-06-05 15:04:15,681 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:15,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:15,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376337447] [2021-06-05 15:04:15,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376337447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:15,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061854859] [2021-06-05 15:04:15,682 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 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 15:04:15,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:04:15,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:15,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:04:15,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:16,138 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:16,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061854859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:16,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:16,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:04:16,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068981427] [2021-06-05 15:04:16,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:04:16,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:16,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:04:16,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:04:16,139 INFO L87 Difference]: Start difference. First operand 2448 states and 6097 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:16,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:16,905 INFO L93 Difference]: Finished difference Result 2598 states and 6448 transitions. [2021-06-05 15:04:16,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:04:16,905 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:04:16,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:16,907 INFO L225 Difference]: With dead ends: 2598 [2021-06-05 15:04:16,907 INFO L226 Difference]: Without dead ends: 2560 [2021-06-05 15:04:16,907 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 1107.1ms TimeCoverageRelationStatistics Valid=299, Invalid=1341, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:04:16,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2560 states. [2021-06-05 15:04:16,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2560 to 2456. [2021-06-05 15:04:16,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2456 states, 2455 states have (on average 2.4916496945010183) internal successors, (6117), 2455 states have internal predecessors, (6117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:16,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2456 states to 2456 states and 6117 transitions. [2021-06-05 15:04:16,928 INFO L78 Accepts]: Start accepts. Automaton has 2456 states and 6117 transitions. Word has length 32 [2021-06-05 15:04:16,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:16,928 INFO L482 AbstractCegarLoop]: Abstraction has 2456 states and 6117 transitions. [2021-06-05 15:04:16,928 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:16,928 INFO L276 IsEmpty]: Start isEmpty. Operand 2456 states and 6117 transitions. [2021-06-05 15:04:16,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:04:16,929 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:16,929 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:17,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3280,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:17,130 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:17,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:17,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1611400702, now seen corresponding path program 213 times [2021-06-05 15:04:17,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:17,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872513963] [2021-06-05 15:04:17,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:17,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:18,113 WARN L205 SmtUtils]: Spent 830.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 16 [2021-06-05 15:04:18,596 WARN L205 SmtUtils]: Spent 465.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 10 [2021-06-05 15:04:18,648 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:18,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:18,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872513963] [2021-06-05 15:04:18,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872513963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:18,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400408875] [2021-06-05 15:04:18,648 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 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 15:04:18,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 15:04:18,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:18,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:04:18,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:19,110 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:19,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400408875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:19,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:19,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:04:19,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925276703] [2021-06-05 15:04:19,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:04:19,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:19,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:04:19,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:04:19,111 INFO L87 Difference]: Start difference. First operand 2456 states and 6117 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:19,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:19,725 INFO L93 Difference]: Finished difference Result 2694 states and 6688 transitions. [2021-06-05 15:04:19,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:04:19,725 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:04:19,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:19,727 INFO L225 Difference]: With dead ends: 2694 [2021-06-05 15:04:19,727 INFO L226 Difference]: Without dead ends: 2656 [2021-06-05 15:04:19,728 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 936.8ms TimeCoverageRelationStatistics Valid=213, Invalid=1193, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:04:19,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2656 states. [2021-06-05 15:04:19,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2656 to 2480. [2021-06-05 15:04:19,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2480 states, 2479 states have (on average 2.491730536506656) internal successors, (6177), 2479 states have internal predecessors, (6177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:19,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2480 states to 2480 states and 6177 transitions. [2021-06-05 15:04:19,751 INFO L78 Accepts]: Start accepts. Automaton has 2480 states and 6177 transitions. Word has length 32 [2021-06-05 15:04:19,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:19,751 INFO L482 AbstractCegarLoop]: Abstraction has 2480 states and 6177 transitions. [2021-06-05 15:04:19,751 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:19,751 INFO L276 IsEmpty]: Start isEmpty. Operand 2480 states and 6177 transitions. [2021-06-05 15:04:19,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:04:19,753 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:19,753 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:19,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3300,222 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:19,954 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:19,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:19,954 INFO L82 PathProgramCache]: Analyzing trace with hash -645396866, now seen corresponding path program 214 times [2021-06-05 15:04:19,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:19,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786811466] [2021-06-05 15:04:19,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:19,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:20,209 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:20,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:20,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786811466] [2021-06-05 15:04:20,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786811466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:20,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909389283] [2021-06-05 15:04:20,210 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 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 15:04:20,232 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:04:20,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:20,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:04:20,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:20,589 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:20,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909389283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:20,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:20,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:04:20,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504366453] [2021-06-05 15:04:20,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:04:20,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:20,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:04:20,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:04:20,590 INFO L87 Difference]: Start difference. First operand 2480 states and 6177 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:21,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:21,076 INFO L93 Difference]: Finished difference Result 2622 states and 6508 transitions. [2021-06-05 15:04:21,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:04:21,077 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:04:21,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:21,079 INFO L225 Difference]: With dead ends: 2622 [2021-06-05 15:04:21,079 INFO L226 Difference]: Without dead ends: 2584 [2021-06-05 15:04:21,079 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 761.4ms TimeCoverageRelationStatistics Valid=203, Invalid=1129, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:04:21,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2584 states. [2021-06-05 15:04:21,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2584 to 2488. [2021-06-05 15:04:21,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2488 states, 2487 states have (on average 2.4917571371129874) internal successors, (6197), 2487 states have internal predecessors, (6197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:21,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2488 states to 2488 states and 6197 transitions. [2021-06-05 15:04:21,099 INFO L78 Accepts]: Start accepts. Automaton has 2488 states and 6197 transitions. Word has length 32 [2021-06-05 15:04:21,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:21,099 INFO L482 AbstractCegarLoop]: Abstraction has 2488 states and 6197 transitions. [2021-06-05 15:04:21,099 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:21,099 INFO L276 IsEmpty]: Start isEmpty. Operand 2488 states and 6197 transitions. [2021-06-05 15:04:21,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:04:21,100 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:21,100 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:21,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3317,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:21,301 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:21,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:21,301 INFO L82 PathProgramCache]: Analyzing trace with hash -457706566, now seen corresponding path program 215 times [2021-06-05 15:04:21,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:21,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046543905] [2021-06-05 15:04:21,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:21,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:21,489 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:21,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:21,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046543905] [2021-06-05 15:04:21,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046543905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:21,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527140604] [2021-06-05 15:04:21,489 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 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 15:04:21,512 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 15:04:21,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:21,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:04:21,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:21,957 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:21,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527140604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:21,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:21,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:04:21,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499980400] [2021-06-05 15:04:21,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:04:21,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:21,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:04:21,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:04:21,973 INFO L87 Difference]: Start difference. First operand 2488 states and 6197 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:22,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:22,608 INFO L93 Difference]: Finished difference Result 2758 states and 6852 transitions. [2021-06-05 15:04:22,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:04:22,608 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:04:22,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:22,611 INFO L225 Difference]: With dead ends: 2758 [2021-06-05 15:04:22,611 INFO L226 Difference]: Without dead ends: 2728 [2021-06-05 15:04:22,611 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 1012.4ms TimeCoverageRelationStatistics Valid=257, Invalid=1303, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:04:22,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2728 states. [2021-06-05 15:04:22,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2728 to 2488. [2021-06-05 15:04:22,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2488 states, 2487 states have (on average 2.4917571371129874) internal successors, (6197), 2487 states have internal predecessors, (6197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:22,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2488 states to 2488 states and 6197 transitions. [2021-06-05 15:04:22,632 INFO L78 Accepts]: Start accepts. Automaton has 2488 states and 6197 transitions. Word has length 32 [2021-06-05 15:04:22,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:22,632 INFO L482 AbstractCegarLoop]: Abstraction has 2488 states and 6197 transitions. [2021-06-05 15:04:22,632 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:22,632 INFO L276 IsEmpty]: Start isEmpty. Operand 2488 states and 6197 transitions. [2021-06-05 15:04:22,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:04:22,633 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:22,633 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:22,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3333,224 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:22,834 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:22,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:22,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1254815034, now seen corresponding path program 216 times [2021-06-05 15:04:22,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:22,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968137121] [2021-06-05 15:04:22,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:22,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:22,967 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:22,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:22,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968137121] [2021-06-05 15:04:22,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968137121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:22,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492216715] [2021-06-05 15:04:22,968 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 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 15:04:22,991 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 15:04:22,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:22,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:04:22,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:23,426 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:23,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492216715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:23,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:23,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:04:23,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758231357] [2021-06-05 15:04:23,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:04:23,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:23,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:04:23,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:04:23,427 INFO L87 Difference]: Start difference. First operand 2488 states and 6197 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:24,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:24,144 INFO L93 Difference]: Finished difference Result 2710 states and 6728 transitions. [2021-06-05 15:04:24,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:04:24,144 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:04:24,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:24,147 INFO L225 Difference]: With dead ends: 2710 [2021-06-05 15:04:24,147 INFO L226 Difference]: Without dead ends: 2672 [2021-06-05 15:04:24,147 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 1009.3ms TimeCoverageRelationStatistics Valid=317, Invalid=1575, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 15:04:24,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2672 states. [2021-06-05 15:04:24,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2672 to 2504. [2021-06-05 15:04:24,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2504 states, 2503 states have (on average 2.4918098282061525) internal successors, (6237), 2503 states have internal predecessors, (6237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:24,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2504 states to 2504 states and 6237 transitions. [2021-06-05 15:04:24,168 INFO L78 Accepts]: Start accepts. Automaton has 2504 states and 6237 transitions. Word has length 32 [2021-06-05 15:04:24,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:24,169 INFO L482 AbstractCegarLoop]: Abstraction has 2504 states and 6237 transitions. [2021-06-05 15:04:24,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:24,169 INFO L276 IsEmpty]: Start isEmpty. Operand 2504 states and 6237 transitions. [2021-06-05 15:04:24,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:04:24,170 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:24,170 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:24,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 225 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3352 [2021-06-05 15:04:24,371 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:24,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:24,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1746761730, now seen corresponding path program 217 times [2021-06-05 15:04:24,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:24,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756944565] [2021-06-05 15:04:24,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:24,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:25,099 WARN L205 SmtUtils]: Spent 535.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 17 [2021-06-05 15:04:31,444 WARN L205 SmtUtils]: Spent 6.33 s on a formula simplification. DAG size of input: 83 DAG size of output: 36 [2021-06-05 15:04:33,540 WARN L205 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 70 DAG size of output: 17 [2021-06-05 15:04:33,641 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:33,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:33,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756944565] [2021-06-05 15:04:33,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756944565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:33,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935638181] [2021-06-05 15:04:33,641 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 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 15:04:33,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:33,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:04:33,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:34,090 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:34,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935638181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:34,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:34,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:04:34,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720372894] [2021-06-05 15:04:34,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:04:34,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:34,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:04:34,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:04:34,090 INFO L87 Difference]: Start difference. First operand 2504 states and 6237 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:34,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:34,667 INFO L93 Difference]: Finished difference Result 2734 states and 6792 transitions. [2021-06-05 15:04:34,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:04:34,668 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:04:34,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:34,670 INFO L225 Difference]: With dead ends: 2734 [2021-06-05 15:04:34,670 INFO L226 Difference]: Without dead ends: 2704 [2021-06-05 15:04:34,670 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 898.2ms TimeCoverageRelationStatistics Valid=233, Invalid=1327, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:04:34,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2704 states. [2021-06-05 15:04:34,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2704 to 2520. [2021-06-05 15:04:34,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2520 states, 2519 states have (on average 2.4918618499404523) internal successors, (6277), 2519 states have internal predecessors, (6277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:34,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2520 states to 2520 states and 6277 transitions. [2021-06-05 15:04:34,695 INFO L78 Accepts]: Start accepts. Automaton has 2520 states and 6277 transitions. Word has length 32 [2021-06-05 15:04:34,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:34,695 INFO L482 AbstractCegarLoop]: Abstraction has 2520 states and 6277 transitions. [2021-06-05 15:04:34,695 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:34,695 INFO L276 IsEmpty]: Start isEmpty. Operand 2520 states and 6277 transitions. [2021-06-05 15:04:34,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:04:34,697 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:34,697 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:34,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3371 [2021-06-05 15:04:34,897 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:34,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:34,897 INFO L82 PathProgramCache]: Analyzing trace with hash 817435834, now seen corresponding path program 218 times [2021-06-05 15:04:34,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:34,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920911979] [2021-06-05 15:04:34,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:34,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:35,256 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:35,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:35,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920911979] [2021-06-05 15:04:35,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920911979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:35,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370859042] [2021-06-05 15:04:35,257 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 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 15:04:35,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:04:35,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:35,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:04:35,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:35,744 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:35,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370859042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:35,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:35,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:04:35,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566821658] [2021-06-05 15:04:35,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:04:35,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:35,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:04:35,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:04:35,745 INFO L87 Difference]: Start difference. First operand 2520 states and 6277 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:36,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:36,486 INFO L93 Difference]: Finished difference Result 2750 states and 6832 transitions. [2021-06-05 15:04:36,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:04:36,486 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:04:36,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:36,489 INFO L225 Difference]: With dead ends: 2750 [2021-06-05 15:04:36,489 INFO L226 Difference]: Without dead ends: 2720 [2021-06-05 15:04:36,489 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 1120.7ms TimeCoverageRelationStatistics Valid=309, Invalid=1497, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:04:36,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2720 states. [2021-06-05 15:04:36,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2720 to 2520. [2021-06-05 15:04:36,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2520 states, 2519 states have (on average 2.4918618499404523) internal successors, (6277), 2519 states have internal predecessors, (6277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:36,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2520 states to 2520 states and 6277 transitions. [2021-06-05 15:04:36,514 INFO L78 Accepts]: Start accepts. Automaton has 2520 states and 6277 transitions. Word has length 32 [2021-06-05 15:04:36,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:36,514 INFO L482 AbstractCegarLoop]: Abstraction has 2520 states and 6277 transitions. [2021-06-05 15:04:36,514 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:36,514 INFO L276 IsEmpty]: Start isEmpty. Operand 2520 states and 6277 transitions. [2021-06-05 15:04:36,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:04:36,516 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:36,516 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:36,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3387,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:36,716 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:36,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:36,717 INFO L82 PathProgramCache]: Analyzing trace with hash -647640962, now seen corresponding path program 219 times [2021-06-05 15:04:36,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:36,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343117232] [2021-06-05 15:04:36,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:36,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:36,877 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:36,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:36,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343117232] [2021-06-05 15:04:36,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343117232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:36,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809789659] [2021-06-05 15:04:36,877 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 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 15:04:36,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 15:04:36,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:36,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 15:04:36,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:37,275 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:37,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809789659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:37,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:37,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:04:37,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731927872] [2021-06-05 15:04:37,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:04:37,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:37,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:04:37,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:04:37,276 INFO L87 Difference]: Start difference. First operand 2520 states and 6277 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:37,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:37,857 INFO L93 Difference]: Finished difference Result 2734 states and 6792 transitions. [2021-06-05 15:04:37,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:04:37,858 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:04:37,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:37,860 INFO L225 Difference]: With dead ends: 2734 [2021-06-05 15:04:37,860 INFO L226 Difference]: Without dead ends: 2704 [2021-06-05 15:04:37,860 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 876.8ms TimeCoverageRelationStatistics Valid=258, Invalid=1224, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:04:37,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2704 states. [2021-06-05 15:04:37,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2704 to 2528. [2021-06-05 15:04:37,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2528 states, 2527 states have (on average 2.4918876137712704) internal successors, (6297), 2527 states have internal predecessors, (6297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:37,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2528 states to 2528 states and 6297 transitions. [2021-06-05 15:04:37,882 INFO L78 Accepts]: Start accepts. Automaton has 2528 states and 6297 transitions. Word has length 32 [2021-06-05 15:04:37,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:37,882 INFO L482 AbstractCegarLoop]: Abstraction has 2528 states and 6297 transitions. [2021-06-05 15:04:37,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:37,883 INFO L276 IsEmpty]: Start isEmpty. Operand 2528 states and 6297 transitions. [2021-06-05 15:04:37,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:04:37,884 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:37,884 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:38,085 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3412,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:38,085 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:38,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:38,085 INFO L82 PathProgramCache]: Analyzing trace with hash 611497402, now seen corresponding path program 220 times [2021-06-05 15:04:38,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:38,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741720076] [2021-06-05 15:04:38,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:38,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:38,349 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:38,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:38,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741720076] [2021-06-05 15:04:38,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741720076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:38,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120536612] [2021-06-05 15:04:38,349 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 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 15:04:38,372 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:04:38,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:38,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:04:38,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:38,758 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:38,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120536612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:38,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:38,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:04:38,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431708015] [2021-06-05 15:04:38,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:04:38,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:38,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:04:38,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:04:38,759 INFO L87 Difference]: Start difference. First operand 2528 states and 6297 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:39,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:39,432 INFO L93 Difference]: Finished difference Result 2814 states and 6992 transitions. [2021-06-05 15:04:39,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:04:39,433 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:04:39,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:39,435 INFO L225 Difference]: With dead ends: 2814 [2021-06-05 15:04:39,435 INFO L226 Difference]: Without dead ends: 2784 [2021-06-05 15:04:39,436 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 933.2ms TimeCoverageRelationStatistics Valid=304, Invalid=1418, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 15:04:39,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2784 states. [2021-06-05 15:04:39,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2784 to 2544. [2021-06-05 15:04:39,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2544 states, 2543 states have (on average 2.491938655131734) internal successors, (6337), 2543 states have internal predecessors, (6337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:39,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2544 states to 2544 states and 6337 transitions. [2021-06-05 15:04:39,459 INFO L78 Accepts]: Start accepts. Automaton has 2544 states and 6337 transitions. Word has length 32 [2021-06-05 15:04:39,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:39,459 INFO L482 AbstractCegarLoop]: Abstraction has 2544 states and 6337 transitions. [2021-06-05 15:04:39,459 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:39,459 INFO L276 IsEmpty]: Start isEmpty. Operand 2544 states and 6337 transitions. [2021-06-05 15:04:39,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:04:39,461 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:39,461 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:39,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3427 [2021-06-05 15:04:39,662 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:39,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:39,662 INFO L82 PathProgramCache]: Analyzing trace with hash 799187702, now seen corresponding path program 221 times [2021-06-05 15:04:39,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:39,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086739093] [2021-06-05 15:04:39,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:39,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:39,819 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:39,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:39,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086739093] [2021-06-05 15:04:39,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086739093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:39,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894929164] [2021-06-05 15:04:39,820 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 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 15:04:39,843 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 15:04:39,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:39,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:04:39,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:40,299 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:40,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894929164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:40,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:40,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:04:40,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201940585] [2021-06-05 15:04:40,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:04:40,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:40,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:04:40,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:04:40,300 INFO L87 Difference]: Start difference. First operand 2544 states and 6337 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:40,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:40,947 INFO L93 Difference]: Finished difference Result 2718 states and 6752 transitions. [2021-06-05 15:04:40,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:04:40,948 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:04:40,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:40,950 INFO L225 Difference]: With dead ends: 2718 [2021-06-05 15:04:40,950 INFO L226 Difference]: Without dead ends: 2688 [2021-06-05 15:04:40,950 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 1001.2ms TimeCoverageRelationStatistics Valid=229, Invalid=1331, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:04:40,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2688 states. [2021-06-05 15:04:40,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2688 to 2552. [2021-06-05 15:04:40,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2552 states, 2551 states have (on average 2.491963935711486) internal successors, (6357), 2551 states have internal predecessors, (6357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:40,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2552 states to 2552 states and 6357 transitions. [2021-06-05 15:04:40,971 INFO L78 Accepts]: Start accepts. Automaton has 2552 states and 6357 transitions. Word has length 32 [2021-06-05 15:04:40,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:40,971 INFO L482 AbstractCegarLoop]: Abstraction has 2552 states and 6357 transitions. [2021-06-05 15:04:40,971 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:40,971 INFO L276 IsEmpty]: Start isEmpty. Operand 2552 states and 6357 transitions. [2021-06-05 15:04:40,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:04:40,973 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:40,973 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:41,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3443,230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:41,173 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:41,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:41,174 INFO L82 PathProgramCache]: Analyzing trace with hash -2103347398, now seen corresponding path program 222 times [2021-06-05 15:04:41,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:41,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247476978] [2021-06-05 15:04:41,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:41,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:41,345 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:41,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:41,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247476978] [2021-06-05 15:04:41,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247476978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:41,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257368860] [2021-06-05 15:04:41,345 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 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 15:04:41,369 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 15:04:41,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:41,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:04:41,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:41,826 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:41,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257368860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:41,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:41,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:04:41,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502726518] [2021-06-05 15:04:41,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:04:41,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:41,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:04:41,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:04:41,827 INFO L87 Difference]: Start difference. First operand 2552 states and 6357 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:42,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:42,628 INFO L93 Difference]: Finished difference Result 2814 states and 6992 transitions. [2021-06-05 15:04:42,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:04:42,628 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:04:42,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:42,631 INFO L225 Difference]: With dead ends: 2814 [2021-06-05 15:04:42,631 INFO L226 Difference]: Without dead ends: 2784 [2021-06-05 15:04:42,631 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 1158.5ms TimeCoverageRelationStatistics Valid=277, Invalid=1363, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:04:42,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2784 states. [2021-06-05 15:04:42,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2784 to 2568. [2021-06-05 15:04:42,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2568 states, 2567 states have (on average 2.4920140241527076) internal successors, (6397), 2567 states have internal predecessors, (6397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:42,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2568 states to 2568 states and 6397 transitions. [2021-06-05 15:04:42,653 INFO L78 Accepts]: Start accepts. Automaton has 2568 states and 6397 transitions. Word has length 32 [2021-06-05 15:04:42,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:42,653 INFO L482 AbstractCegarLoop]: Abstraction has 2568 states and 6397 transitions. [2021-06-05 15:04:42,653 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:42,654 INFO L276 IsEmpty]: Start isEmpty. Operand 2568 states and 6397 transitions. [2021-06-05 15:04:42,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:04:42,655 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:42,655 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:42,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3457 [2021-06-05 15:04:42,856 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:42,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:42,856 INFO L82 PathProgramCache]: Analyzing trace with hash 460850166, now seen corresponding path program 223 times [2021-06-05 15:04:42,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:42,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565066132] [2021-06-05 15:04:42,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:42,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:43,002 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:43,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:43,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565066132] [2021-06-05 15:04:43,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565066132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:43,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771620946] [2021-06-05 15:04:43,002 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 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 15:04:43,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:43,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:04:43,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:43,512 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:43,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771620946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:43,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:43,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:04:43,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727540540] [2021-06-05 15:04:43,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:04:43,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:43,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:04:43,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:04:43,513 INFO L87 Difference]: Start difference. First operand 2568 states and 6397 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:44,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:44,150 INFO L93 Difference]: Finished difference Result 2798 states and 6956 transitions. [2021-06-05 15:04:44,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:04:44,151 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:04:44,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:44,153 INFO L225 Difference]: With dead ends: 2798 [2021-06-05 15:04:44,153 INFO L226 Difference]: Without dead ends: 2776 [2021-06-05 15:04:44,154 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 984.2ms TimeCoverageRelationStatistics Valid=213, Invalid=1193, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:04:44,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2776 states. [2021-06-05 15:04:44,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2776 to 2552. [2021-06-05 15:04:44,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2552 states, 2551 states have (on average 2.491963935711486) internal successors, (6357), 2551 states have internal predecessors, (6357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:44,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2552 states to 2552 states and 6357 transitions. [2021-06-05 15:04:44,179 INFO L78 Accepts]: Start accepts. Automaton has 2552 states and 6357 transitions. Word has length 32 [2021-06-05 15:04:44,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:44,179 INFO L482 AbstractCegarLoop]: Abstraction has 2552 states and 6357 transitions. [2021-06-05 15:04:44,179 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:44,179 INFO L276 IsEmpty]: Start isEmpty. Operand 2552 states and 6357 transitions. [2021-06-05 15:04:44,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:04:44,181 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:44,181 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:44,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3479,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:44,381 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:44,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:44,381 INFO L82 PathProgramCache]: Analyzing trace with hash 698526078, now seen corresponding path program 224 times [2021-06-05 15:04:44,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:44,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874650346] [2021-06-05 15:04:44,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:44,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:44,571 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:44,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:44,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874650346] [2021-06-05 15:04:44,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874650346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:44,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838520459] [2021-06-05 15:04:44,571 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 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 15:04:44,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:04:44,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:44,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:04:44,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:44,961 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:44,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838520459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:44,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:44,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:04:44,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852010269] [2021-06-05 15:04:44,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:04:44,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:44,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:04:44,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:04:44,962 INFO L87 Difference]: Start difference. First operand 2552 states and 6357 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:45,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:45,534 INFO L93 Difference]: Finished difference Result 2798 states and 6948 transitions. [2021-06-05 15:04:45,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:04:45,534 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:04:45,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:45,536 INFO L225 Difference]: With dead ends: 2798 [2021-06-05 15:04:45,536 INFO L226 Difference]: Without dead ends: 2760 [2021-06-05 15:04:45,537 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 775.4ms TimeCoverageRelationStatistics Valid=278, Invalid=1282, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:04:45,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2760 states. [2021-06-05 15:04:45,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2760 to 2576. [2021-06-05 15:04:45,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2576 states, 2575 states have (on average 2.4920388349514564) internal successors, (6417), 2575 states have internal predecessors, (6417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:45,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2576 states to 2576 states and 6417 transitions. [2021-06-05 15:04:45,558 INFO L78 Accepts]: Start accepts. Automaton has 2576 states and 6417 transitions. Word has length 32 [2021-06-05 15:04:45,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:45,558 INFO L482 AbstractCegarLoop]: Abstraction has 2576 states and 6417 transitions. [2021-06-05 15:04:45,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:45,558 INFO L276 IsEmpty]: Start isEmpty. Operand 2576 states and 6417 transitions. [2021-06-05 15:04:45,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:04:45,559 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:45,559 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:45,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3499,233 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:45,760 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:45,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:45,760 INFO L82 PathProgramCache]: Analyzing trace with hash 2145354742, now seen corresponding path program 225 times [2021-06-05 15:04:45,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:45,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753378400] [2021-06-05 15:04:45,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:45,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:45,901 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:45,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:45,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753378400] [2021-06-05 15:04:45,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753378400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:45,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652509739] [2021-06-05 15:04:45,902 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 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 15:04:45,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 15:04:45,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:45,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:04:45,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:46,339 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:46,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652509739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:46,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:46,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:04:46,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675157781] [2021-06-05 15:04:46,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:04:46,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:46,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:04:46,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:04:46,340 INFO L87 Difference]: Start difference. First operand 2576 states and 6417 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:46,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:46,888 INFO L93 Difference]: Finished difference Result 2742 states and 6812 transitions. [2021-06-05 15:04:46,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:04:46,888 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:04:46,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:46,891 INFO L225 Difference]: With dead ends: 2742 [2021-06-05 15:04:46,891 INFO L226 Difference]: Without dead ends: 2712 [2021-06-05 15:04:46,891 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 812.5ms TimeCoverageRelationStatistics Valid=217, Invalid=1265, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:04:46,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2712 states. [2021-06-05 15:04:46,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2712 to 2568. [2021-06-05 15:04:46,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2568 states, 2567 states have (on average 2.4920140241527076) internal successors, (6397), 2567 states have internal predecessors, (6397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:46,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2568 states to 2568 states and 6397 transitions. [2021-06-05 15:04:46,914 INFO L78 Accepts]: Start accepts. Automaton has 2568 states and 6397 transitions. Word has length 32 [2021-06-05 15:04:46,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:46,914 INFO L482 AbstractCegarLoop]: Abstraction has 2568 states and 6397 transitions. [2021-06-05 15:04:46,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:46,914 INFO L276 IsEmpty]: Start isEmpty. Operand 2568 states and 6397 transitions. [2021-06-05 15:04:46,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:04:46,916 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:46,916 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:47,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3520,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:47,117 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:47,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:47,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1619326906, now seen corresponding path program 226 times [2021-06-05 15:04:47,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:47,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369894198] [2021-06-05 15:04:47,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:47,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:47,314 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:47,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:47,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369894198] [2021-06-05 15:04:47,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369894198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:47,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380931920] [2021-06-05 15:04:47,315 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 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 15:04:47,340 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:04:47,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:47,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:04:47,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:47,657 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:47,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380931920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:47,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:47,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:04:47,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092118220] [2021-06-05 15:04:47,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:04:47,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:47,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:04:47,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:04:47,658 INFO L87 Difference]: Start difference. First operand 2568 states and 6397 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:48,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:48,510 INFO L93 Difference]: Finished difference Result 2886 states and 7172 transitions. [2021-06-05 15:04:48,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 15:04:48,511 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:04:48,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:48,513 INFO L225 Difference]: With dead ends: 2886 [2021-06-05 15:04:48,513 INFO L226 Difference]: Without dead ends: 2856 [2021-06-05 15:04:48,513 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 976.9ms TimeCoverageRelationStatistics Valid=405, Invalid=1851, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 15:04:48,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2856 states. [2021-06-05 15:04:48,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2856 to 2600. [2021-06-05 15:04:48,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2600 states, 2599 states have (on average 2.492112350904194) internal successors, (6477), 2599 states have internal predecessors, (6477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:48,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2600 states to 2600 states and 6477 transitions. [2021-06-05 15:04:48,538 INFO L78 Accepts]: Start accepts. Automaton has 2600 states and 6477 transitions. Word has length 32 [2021-06-05 15:04:48,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:48,538 INFO L482 AbstractCegarLoop]: Abstraction has 2600 states and 6477 transitions. [2021-06-05 15:04:48,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:48,538 INFO L276 IsEmpty]: Start isEmpty. Operand 2600 states and 6477 transitions. [2021-06-05 15:04:48,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:04:48,540 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:48,540 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:48,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3542,235 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:48,753 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:48,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:48,753 INFO L82 PathProgramCache]: Analyzing trace with hash -757180358, now seen corresponding path program 227 times [2021-06-05 15:04:48,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:48,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012054074] [2021-06-05 15:04:48,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:48,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:48,949 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:48,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:48,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012054074] [2021-06-05 15:04:48,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012054074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:48,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788013270] [2021-06-05 15:04:48,950 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 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 15:04:48,973 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 15:04:48,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:48,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:04:48,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:49,417 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:49,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788013270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:49,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:49,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:04:49,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383471805] [2021-06-05 15:04:49,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:04:49,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:49,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:04:49,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:04:49,418 INFO L87 Difference]: Start difference. First operand 2600 states and 6477 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:50,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:50,105 INFO L93 Difference]: Finished difference Result 2910 states and 7232 transitions. [2021-06-05 15:04:50,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:04:50,105 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:04:50,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:50,108 INFO L225 Difference]: With dead ends: 2910 [2021-06-05 15:04:50,108 INFO L226 Difference]: Without dead ends: 2880 [2021-06-05 15:04:50,108 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 999.4ms TimeCoverageRelationStatistics Valid=269, Invalid=1371, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:04:50,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2880 states. [2021-06-05 15:04:50,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2880 to 2616. [2021-06-05 15:04:50,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2616 states, 2615 states have (on average 2.4921606118546844) internal successors, (6517), 2615 states have internal predecessors, (6517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:50,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2616 states to 2616 states and 6517 transitions. [2021-06-05 15:04:50,130 INFO L78 Accepts]: Start accepts. Automaton has 2616 states and 6517 transitions. Word has length 32 [2021-06-05 15:04:50,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:50,131 INFO L482 AbstractCegarLoop]: Abstraction has 2616 states and 6517 transitions. [2021-06-05 15:04:50,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:50,131 INFO L276 IsEmpty]: Start isEmpty. Operand 2616 states and 6517 transitions. [2021-06-05 15:04:50,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:04:50,132 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:50,132 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:50,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3557,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:50,333 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:50,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:50,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1807017206, now seen corresponding path program 228 times [2021-06-05 15:04:50,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:50,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206084545] [2021-06-05 15:04:50,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:50,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:50,521 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:50,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:50,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206084545] [2021-06-05 15:04:50,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206084545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:50,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75319892] [2021-06-05 15:04:50,522 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 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 15:04:50,545 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 15:04:50,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:50,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:04:50,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:50,979 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:50,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75319892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:50,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:50,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:04:50,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352850658] [2021-06-05 15:04:50,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:04:50,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:50,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:04:50,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:04:50,980 INFO L87 Difference]: Start difference. First operand 2616 states and 6517 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:51,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:51,597 INFO L93 Difference]: Finished difference Result 2894 states and 7196 transitions. [2021-06-05 15:04:51,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:04:51,597 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:04:51,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:51,599 INFO L225 Difference]: With dead ends: 2894 [2021-06-05 15:04:51,600 INFO L226 Difference]: Without dead ends: 2872 [2021-06-05 15:04:51,600 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 936.6ms TimeCoverageRelationStatistics Valid=218, Invalid=1264, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:04:51,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2872 states. [2021-06-05 15:04:51,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2872 to 2600. [2021-06-05 15:04:51,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2600 states, 2599 states have (on average 2.492112350904194) internal successors, (6477), 2599 states have internal predecessors, (6477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:51,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2600 states to 2600 states and 6477 transitions. [2021-06-05 15:04:51,625 INFO L78 Accepts]: Start accepts. Automaton has 2600 states and 6477 transitions. Word has length 32 [2021-06-05 15:04:51,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:51,625 INFO L482 AbstractCegarLoop]: Abstraction has 2600 states and 6477 transitions. [2021-06-05 15:04:51,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:51,625 INFO L276 IsEmpty]: Start isEmpty. Operand 2600 states and 6477 transitions. [2021-06-05 15:04:51,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:04:51,627 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:51,627 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:51,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3585,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:51,827 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:51,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:51,827 INFO L82 PathProgramCache]: Analyzing trace with hash 517962042, now seen corresponding path program 229 times [2021-06-05 15:04:51,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:51,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179081997] [2021-06-05 15:04:51,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:51,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:52,020 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:52,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:52,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179081997] [2021-06-05 15:04:52,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179081997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:52,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25314147] [2021-06-05 15:04:52,020 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 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 15:04:52,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:52,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:04:52,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:52,489 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:52,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25314147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:52,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:52,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:04:52,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359142557] [2021-06-05 15:04:52,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:04:52,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:52,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:04:52,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:04:52,490 INFO L87 Difference]: Start difference. First operand 2600 states and 6477 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:53,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:53,121 INFO L93 Difference]: Finished difference Result 2822 states and 7008 transitions. [2021-06-05 15:04:53,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:04:53,121 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:04:53,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:53,124 INFO L225 Difference]: With dead ends: 2822 [2021-06-05 15:04:53,124 INFO L226 Difference]: Without dead ends: 2784 [2021-06-05 15:04:53,124 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 939.8ms TimeCoverageRelationStatistics Valid=294, Invalid=1428, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 15:04:53,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2784 states. [2021-06-05 15:04:53,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2784 to 2600. [2021-06-05 15:04:53,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2600 states, 2599 states have (on average 2.492112350904194) internal successors, (6477), 2599 states have internal predecessors, (6477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:53,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2600 states to 2600 states and 6477 transitions. [2021-06-05 15:04:53,149 INFO L78 Accepts]: Start accepts. Automaton has 2600 states and 6477 transitions. Word has length 32 [2021-06-05 15:04:53,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:53,149 INFO L482 AbstractCegarLoop]: Abstraction has 2600 states and 6477 transitions. [2021-06-05 15:04:53,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:53,149 INFO L276 IsEmpty]: Start isEmpty. Operand 2600 states and 6477 transitions. [2021-06-05 15:04:53,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:04:53,151 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:53,151 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:53,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3602,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:53,351 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:53,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:53,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1231055822, now seen corresponding path program 230 times [2021-06-05 15:04:53,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:53,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718893668] [2021-06-05 15:04:53,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:53,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:53,551 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:53,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:53,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718893668] [2021-06-05 15:04:53,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718893668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:53,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319000063] [2021-06-05 15:04:53,551 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 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 15:04:53,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:04:53,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:53,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:04:53,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:53,962 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:53,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319000063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:53,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:53,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:04:53,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254933517] [2021-06-05 15:04:53,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:04:53,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:53,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:04:53,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:04:53,963 INFO L87 Difference]: Start difference. First operand 2600 states and 6477 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:54,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:54,611 INFO L93 Difference]: Finished difference Result 2926 states and 7264 transitions. [2021-06-05 15:04:54,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:04:54,612 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:04:54,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:54,614 INFO L225 Difference]: With dead ends: 2926 [2021-06-05 15:04:54,614 INFO L226 Difference]: Without dead ends: 2880 [2021-06-05 15:04:54,615 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 971.7ms TimeCoverageRelationStatistics Valid=270, Invalid=1370, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:04:54,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2880 states. [2021-06-05 15:04:54,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2880 to 2600. [2021-06-05 15:04:54,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2600 states, 2599 states have (on average 2.492112350904194) internal successors, (6477), 2599 states have internal predecessors, (6477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:54,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2600 states to 2600 states and 6477 transitions. [2021-06-05 15:04:54,639 INFO L78 Accepts]: Start accepts. Automaton has 2600 states and 6477 transitions. Word has length 32 [2021-06-05 15:04:54,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:54,639 INFO L482 AbstractCegarLoop]: Abstraction has 2600 states and 6477 transitions. [2021-06-05 15:04:54,639 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:54,639 INFO L276 IsEmpty]: Start isEmpty. Operand 2600 states and 6477 transitions. [2021-06-05 15:04:54,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:04:54,641 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:54,641 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:54,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3630,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:54,842 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:54,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:54,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1260497142, now seen corresponding path program 231 times [2021-06-05 15:04:54,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:54,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368283283] [2021-06-05 15:04:54,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:54,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:55,005 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:55,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:55,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368283283] [2021-06-05 15:04:55,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368283283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:55,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597817658] [2021-06-05 15:04:55,005 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 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 15:04:55,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 15:04:55,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:55,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:04:55,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:55,366 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:55,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597817658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:55,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:55,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:04:55,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675627253] [2021-06-05 15:04:55,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:04:55,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:55,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:04:55,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:04:55,367 INFO L87 Difference]: Start difference. First operand 2600 states and 6477 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:55,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:55,912 INFO L93 Difference]: Finished difference Result 2782 states and 6908 transitions. [2021-06-05 15:04:55,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:04:55,913 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:04:55,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:55,915 INFO L225 Difference]: With dead ends: 2782 [2021-06-05 15:04:55,915 INFO L226 Difference]: Without dead ends: 2744 [2021-06-05 15:04:55,915 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 774.9ms TimeCoverageRelationStatistics Valid=284, Invalid=1276, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:04:55,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2744 states. [2021-06-05 15:04:55,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2744 to 2600. [2021-06-05 15:04:55,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2600 states, 2599 states have (on average 2.492112350904194) internal successors, (6477), 2599 states have internal predecessors, (6477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:55,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2600 states to 2600 states and 6477 transitions. [2021-06-05 15:04:55,937 INFO L78 Accepts]: Start accepts. Automaton has 2600 states and 6477 transitions. Word has length 32 [2021-06-05 15:04:55,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:55,937 INFO L482 AbstractCegarLoop]: Abstraction has 2600 states and 6477 transitions. [2021-06-05 15:04:55,937 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:55,937 INFO L276 IsEmpty]: Start isEmpty. Operand 2600 states and 6477 transitions. [2021-06-05 15:04:55,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:04:55,939 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:55,939 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:56,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3662,240 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:56,153 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:56,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:56,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1455933510, now seen corresponding path program 232 times [2021-06-05 15:04:56,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:56,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434706461] [2021-06-05 15:04:56,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:56,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:56,390 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 10 [2021-06-05 15:04:56,485 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:56,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:56,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434706461] [2021-06-05 15:04:56,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434706461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:56,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706287264] [2021-06-05 15:04:56,485 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 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 15:04:56,508 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:04:56,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:56,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:04:56,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:56,850 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:56,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706287264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:56,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:56,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:04:56,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603186949] [2021-06-05 15:04:56,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:04:56,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:56,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:04:56,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:04:56,851 INFO L87 Difference]: Start difference. First operand 2600 states and 6477 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:57,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:57,520 INFO L93 Difference]: Finished difference Result 2806 states and 6972 transitions. [2021-06-05 15:04:57,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:04:57,521 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:04:57,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:57,523 INFO L225 Difference]: With dead ends: 2806 [2021-06-05 15:04:57,523 INFO L226 Difference]: Without dead ends: 2776 [2021-06-05 15:04:57,523 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 838.9ms TimeCoverageRelationStatistics Valid=358, Invalid=1534, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 15:04:57,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2776 states. [2021-06-05 15:04:57,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2776 to 2624. [2021-06-05 15:04:57,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2624 states, 2623 states have (on average 2.492184521540221) internal successors, (6537), 2623 states have internal predecessors, (6537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:57,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2624 states to 2624 states and 6537 transitions. [2021-06-05 15:04:57,544 INFO L78 Accepts]: Start accepts. Automaton has 2624 states and 6537 transitions. Word has length 32 [2021-06-05 15:04:57,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:57,545 INFO L482 AbstractCegarLoop]: Abstraction has 2624 states and 6537 transitions. [2021-06-05 15:04:57,545 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:57,545 INFO L276 IsEmpty]: Start isEmpty. Operand 2624 states and 6537 transitions. [2021-06-05 15:04:57,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:04:57,546 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:57,546 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:57,747 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3681 [2021-06-05 15:04:57,747 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:57,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:57,747 INFO L82 PathProgramCache]: Analyzing trace with hash 462526522, now seen corresponding path program 233 times [2021-06-05 15:04:57,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:57,747 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459630531] [2021-06-05 15:04:57,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:57,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:57,930 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:57,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:57,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459630531] [2021-06-05 15:04:57,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459630531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:57,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323160682] [2021-06-05 15:04:57,931 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 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 15:04:57,954 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 15:04:57,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:57,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:04:57,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:58,359 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:58,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323160682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:58,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:58,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:04:58,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970266007] [2021-06-05 15:04:58,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:04:58,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:58,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:04:58,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:04:58,360 INFO L87 Difference]: Start difference. First operand 2624 states and 6537 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:58,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:58,937 INFO L93 Difference]: Finished difference Result 2798 states and 6948 transitions. [2021-06-05 15:04:58,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:04:58,938 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:04:58,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:58,940 INFO L225 Difference]: With dead ends: 2798 [2021-06-05 15:04:58,940 INFO L226 Difference]: Without dead ends: 2760 [2021-06-05 15:04:58,940 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 813.1ms TimeCoverageRelationStatistics Valid=253, Invalid=1307, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:04:58,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2760 states. [2021-06-05 15:04:58,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2760 to 2624. [2021-06-05 15:04:58,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2624 states, 2623 states have (on average 2.492184521540221) internal successors, (6537), 2623 states have internal predecessors, (6537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:58,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2624 states to 2624 states and 6537 transitions. [2021-06-05 15:04:58,963 INFO L78 Accepts]: Start accepts. Automaton has 2624 states and 6537 transitions. Word has length 32 [2021-06-05 15:04:58,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:58,963 INFO L482 AbstractCegarLoop]: Abstraction has 2624 states and 6537 transitions. [2021-06-05 15:04:58,963 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:58,963 INFO L276 IsEmpty]: Start isEmpty. Operand 2624 states and 6537 transitions. [2021-06-05 15:04:58,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:04:58,965 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:58,965 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:59,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3697,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:59,166 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:59,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:59,166 INFO L82 PathProgramCache]: Analyzing trace with hash 124188986, now seen corresponding path program 234 times [2021-06-05 15:04:59,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:59,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608300706] [2021-06-05 15:04:59,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:59,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:59,354 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:59,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:59,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608300706] [2021-06-05 15:04:59,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608300706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:59,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940833730] [2021-06-05 15:04:59,354 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 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 15:04:59,380 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 15:04:59,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:59,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:04:59,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:59,806 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:59,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940833730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:59,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:59,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:04:59,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361921697] [2021-06-05 15:04:59,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:04:59,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:59,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:04:59,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:04:59,807 INFO L87 Difference]: Start difference. First operand 2624 states and 6537 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:00,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:00,502 INFO L93 Difference]: Finished difference Result 2894 states and 7192 transitions. [2021-06-05 15:05:00,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:05:00,502 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:05:00,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:00,505 INFO L225 Difference]: With dead ends: 2894 [2021-06-05 15:05:00,505 INFO L226 Difference]: Without dead ends: 2864 [2021-06-05 15:05:00,505 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 1039.1ms TimeCoverageRelationStatistics Valid=268, Invalid=1372, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:05:00,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2864 states. [2021-06-05 15:05:00,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2864 to 2640. [2021-06-05 15:05:00,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2640 states, 2639 states have (on average 2.4922319060250095) internal successors, (6577), 2639 states have internal predecessors, (6577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:00,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2640 states to 2640 states and 6577 transitions. [2021-06-05 15:05:00,528 INFO L78 Accepts]: Start accepts. Automaton has 2640 states and 6577 transitions. Word has length 32 [2021-06-05 15:05:00,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:00,528 INFO L482 AbstractCegarLoop]: Abstraction has 2640 states and 6577 transitions. [2021-06-05 15:05:00,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:00,528 INFO L276 IsEmpty]: Start isEmpty. Operand 2640 states and 6577 transitions. [2021-06-05 15:05:00,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:05:00,529 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:00,530 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:00,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3720 [2021-06-05 15:05:00,730 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:00,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:00,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1606580746, now seen corresponding path program 235 times [2021-06-05 15:05:00,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:00,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250881048] [2021-06-05 15:05:00,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:00,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:00,874 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:00,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:00,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250881048] [2021-06-05 15:05:00,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250881048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:00,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076275126] [2021-06-05 15:05:00,874 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 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 15:05:00,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:00,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:05:00,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:01,314 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:01,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076275126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:01,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:01,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:05:01,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883527096] [2021-06-05 15:05:01,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:05:01,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:01,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:05:01,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:05:01,315 INFO L87 Difference]: Start difference. First operand 2640 states and 6577 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:01,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:01,974 INFO L93 Difference]: Finished difference Result 2878 states and 7156 transitions. [2021-06-05 15:05:01,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:05:01,974 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:05:01,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:01,977 INFO L225 Difference]: With dead ends: 2878 [2021-06-05 15:05:01,977 INFO L226 Difference]: Without dead ends: 2856 [2021-06-05 15:05:01,977 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 916.8ms TimeCoverageRelationStatistics Valid=222, Invalid=1260, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:05:01,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2856 states. [2021-06-05 15:05:01,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2856 to 2616. [2021-06-05 15:05:01,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2616 states, 2615 states have (on average 2.4921606118546844) internal successors, (6517), 2615 states have internal predecessors, (6517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:02,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2616 states to 2616 states and 6517 transitions. [2021-06-05 15:05:02,002 INFO L78 Accepts]: Start accepts. Automaton has 2616 states and 6517 transitions. Word has length 32 [2021-06-05 15:05:02,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:02,002 INFO L482 AbstractCegarLoop]: Abstraction has 2616 states and 6517 transitions. [2021-06-05 15:05:02,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:02,003 INFO L276 IsEmpty]: Start isEmpty. Operand 2616 states and 6517 transitions. [2021-06-05 15:05:02,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:05:02,005 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:02,005 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:02,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3740,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:02,205 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:02,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:02,205 INFO L82 PathProgramCache]: Analyzing trace with hash -2103411910, now seen corresponding path program 236 times [2021-06-05 15:05:02,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:02,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755174073] [2021-06-05 15:05:02,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:02,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:02,434 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:02,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:02,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755174073] [2021-06-05 15:05:02,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755174073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:02,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496183930] [2021-06-05 15:05:02,434 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 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 15:05:02,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:05:02,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:02,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:05:02,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:02,797 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:02,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496183930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:02,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:02,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:05:02,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999412412] [2021-06-05 15:05:02,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:05:02,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:02,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:05:02,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:05:02,798 INFO L87 Difference]: Start difference. First operand 2616 states and 6517 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:03,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:03,412 INFO L93 Difference]: Finished difference Result 2790 states and 6932 transitions. [2021-06-05 15:05:03,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:05:03,412 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:05:03,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:03,415 INFO L225 Difference]: With dead ends: 2790 [2021-06-05 15:05:03,415 INFO L226 Difference]: Without dead ends: 2760 [2021-06-05 15:05:03,415 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 877.6ms TimeCoverageRelationStatistics Valid=268, Invalid=1214, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:05:03,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2760 states. [2021-06-05 15:05:03,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2760 to 2624. [2021-06-05 15:05:03,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2624 states, 2623 states have (on average 2.492184521540221) internal successors, (6537), 2623 states have internal predecessors, (6537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:03,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2624 states to 2624 states and 6537 transitions. [2021-06-05 15:05:03,437 INFO L78 Accepts]: Start accepts. Automaton has 2624 states and 6537 transitions. Word has length 32 [2021-06-05 15:05:03,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:03,437 INFO L482 AbstractCegarLoop]: Abstraction has 2624 states and 6537 transitions. [2021-06-05 15:05:03,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:03,437 INFO L276 IsEmpty]: Start isEmpty. Operand 2624 states and 6537 transitions. [2021-06-05 15:05:03,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:05:03,439 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:03,439 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:03,639 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3762 [2021-06-05 15:05:03,639 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:03,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:03,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1042745718, now seen corresponding path program 237 times [2021-06-05 15:05:03,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:03,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141677822] [2021-06-05 15:05:03,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:03,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:03,810 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:03,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:03,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141677822] [2021-06-05 15:05:03,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141677822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:03,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965391513] [2021-06-05 15:05:03,811 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 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 15:05:03,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 15:05:03,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:03,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:05:03,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:04,182 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:04,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965391513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:04,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:04,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:05:04,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422228091] [2021-06-05 15:05:04,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:05:04,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:04,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:05:04,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:05:04,183 INFO L87 Difference]: Start difference. First operand 2624 states and 6537 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:04,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:04,665 INFO L93 Difference]: Finished difference Result 2774 states and 6892 transitions. [2021-06-05 15:05:04,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:05:04,665 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:05:04,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:04,667 INFO L225 Difference]: With dead ends: 2774 [2021-06-05 15:05:04,668 INFO L226 Difference]: Without dead ends: 2744 [2021-06-05 15:05:04,668 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 734.8ms TimeCoverageRelationStatistics Valid=243, Invalid=1317, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:05:04,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2744 states. [2021-06-05 15:05:04,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2744 to 2632. [2021-06-05 15:05:04,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2632 states, 2631 states have (on average 2.492208285822881) internal successors, (6557), 2631 states have internal predecessors, (6557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:04,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2632 states to 2632 states and 6557 transitions. [2021-06-05 15:05:04,690 INFO L78 Accepts]: Start accepts. Automaton has 2632 states and 6557 transitions. Word has length 32 [2021-06-05 15:05:04,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:04,690 INFO L482 AbstractCegarLoop]: Abstraction has 2632 states and 6557 transitions. [2021-06-05 15:05:04,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:04,691 INFO L276 IsEmpty]: Start isEmpty. Operand 2632 states and 6557 transitions. [2021-06-05 15:05:04,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:05:04,692 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:04,692 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:04,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3777,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:04,905 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:04,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:04,905 INFO L82 PathProgramCache]: Analyzing trace with hash -757244870, now seen corresponding path program 238 times [2021-06-05 15:05:04,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:04,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20881665] [2021-06-05 15:05:04,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:04,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:05,295 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:05,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:05,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20881665] [2021-06-05 15:05:05,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20881665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:05,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137789687] [2021-06-05 15:05:05,296 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 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 15:05:05,319 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:05:05,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:05,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:05:05,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:05,685 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:05,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137789687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:05,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:05,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:05:05,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311596264] [2021-06-05 15:05:05,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:05:05,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:05,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:05:05,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:05:05,686 INFO L87 Difference]: Start difference. First operand 2632 states and 6557 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:06,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:06,450 INFO L93 Difference]: Finished difference Result 2766 states and 6876 transitions. [2021-06-05 15:05:06,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:05:06,450 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:05:06,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:06,453 INFO L225 Difference]: With dead ends: 2766 [2021-06-05 15:05:06,453 INFO L226 Difference]: Without dead ends: 2736 [2021-06-05 15:05:06,461 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 1064.4ms TimeCoverageRelationStatistics Valid=313, Invalid=1409, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 15:05:06,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2736 states. [2021-06-05 15:05:06,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2736 to 2616. [2021-06-05 15:05:06,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2616 states, 2615 states have (on average 2.4921606118546844) internal successors, (6517), 2615 states have internal predecessors, (6517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:06,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2616 states to 2616 states and 6517 transitions. [2021-06-05 15:05:06,486 INFO L78 Accepts]: Start accepts. Automaton has 2616 states and 6517 transitions. Word has length 32 [2021-06-05 15:05:06,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:06,486 INFO L482 AbstractCegarLoop]: Abstraction has 2616 states and 6517 transitions. [2021-06-05 15:05:06,486 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:06,486 INFO L276 IsEmpty]: Start isEmpty. Operand 2616 states and 6517 transitions. [2021-06-05 15:05:06,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:05:06,488 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:06,488 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:06,701 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3800,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:06,701 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:06,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:06,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1906054538, now seen corresponding path program 239 times [2021-06-05 15:05:06,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:06,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869932706] [2021-06-05 15:05:06,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:06,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:07,010 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:07,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:07,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869932706] [2021-06-05 15:05:07,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869932706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:07,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387361517] [2021-06-05 15:05:07,010 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 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 15:05:07,044 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 15:05:07,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:07,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:05:07,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:07,398 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:07,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387361517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:07,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:07,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:05:07,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059243929] [2021-06-05 15:05:07,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:05:07,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:07,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:05:07,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:05:07,398 INFO L87 Difference]: Start difference. First operand 2616 states and 6517 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:07,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:07,957 INFO L93 Difference]: Finished difference Result 2898 states and 7143 transitions. [2021-06-05 15:05:07,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:05:07,957 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:05:07,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:07,960 INFO L225 Difference]: With dead ends: 2898 [2021-06-05 15:05:07,960 INFO L226 Difference]: Without dead ends: 2868 [2021-06-05 15:05:07,960 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 921.9ms TimeCoverageRelationStatistics Valid=242, Invalid=1480, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 15:05:07,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2868 states. [2021-06-05 15:05:07,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2868 to 2656. [2021-06-05 15:05:07,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2656 states, 2655 states have (on average 2.4937853107344634) internal successors, (6621), 2655 states have internal predecessors, (6621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:07,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2656 states to 2656 states and 6621 transitions. [2021-06-05 15:05:07,983 INFO L78 Accepts]: Start accepts. Automaton has 2656 states and 6621 transitions. Word has length 32 [2021-06-05 15:05:07,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:07,983 INFO L482 AbstractCegarLoop]: Abstraction has 2656 states and 6621 transitions. [2021-06-05 15:05:07,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:07,983 INFO L276 IsEmpty]: Start isEmpty. Operand 2656 states and 6621 transitions. [2021-06-05 15:05:07,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:05:07,985 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:07,985 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:08,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3820,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:08,189 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:08,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:08,189 INFO L82 PathProgramCache]: Analyzing trace with hash 639894894, now seen corresponding path program 240 times [2021-06-05 15:05:08,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:08,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612862440] [2021-06-05 15:05:08,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:08,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:08,360 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:08,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:08,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612862440] [2021-06-05 15:05:08,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612862440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:08,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844559518] [2021-06-05 15:05:08,361 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 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 15:05:08,385 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 15:05:08,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:08,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:05:08,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:08,688 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:08,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844559518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:08,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:08,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:05:08,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647439391] [2021-06-05 15:05:08,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:05:08,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:08,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:05:08,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:05:08,689 INFO L87 Difference]: Start difference. First operand 2656 states and 6621 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:09,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:09,124 INFO L93 Difference]: Finished difference Result 2742 states and 6812 transitions. [2021-06-05 15:05:09,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:05:09,135 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:05:09,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:09,137 INFO L225 Difference]: With dead ends: 2742 [2021-06-05 15:05:09,137 INFO L226 Difference]: Without dead ends: 2712 [2021-06-05 15:05:09,137 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 677.9ms TimeCoverageRelationStatistics Valid=205, Invalid=1127, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:05:09,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2712 states. [2021-06-05 15:05:09,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2712 to 2648. [2021-06-05 15:05:09,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2648 states, 2647 states have (on average 2.4922553834529655) internal successors, (6597), 2647 states have internal predecessors, (6597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:09,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2648 states to 2648 states and 6597 transitions. [2021-06-05 15:05:09,162 INFO L78 Accepts]: Start accepts. Automaton has 2648 states and 6597 transitions. Word has length 32 [2021-06-05 15:05:09,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:09,162 INFO L482 AbstractCegarLoop]: Abstraction has 2648 states and 6597 transitions. [2021-06-05 15:05:09,162 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:09,162 INFO L276 IsEmpty]: Start isEmpty. Operand 2648 states and 6597 transitions. [2021-06-05 15:05:09,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:05:09,164 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:09,164 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:09,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3834 [2021-06-05 15:05:09,364 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:09,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:09,365 INFO L82 PathProgramCache]: Analyzing trace with hash 468208630, now seen corresponding path program 241 times [2021-06-05 15:05:09,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:09,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776153185] [2021-06-05 15:05:09,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:09,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:09,751 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 13 [2021-06-05 15:05:09,911 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 10 [2021-06-05 15:05:10,106 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 9 [2021-06-05 15:05:10,185 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:10,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:10,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776153185] [2021-06-05 15:05:10,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776153185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:10,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790134958] [2021-06-05 15:05:10,186 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 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 15:05:10,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:10,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 15:05:10,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:10,486 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:10,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790134958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:10,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:10,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:05:10,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138766838] [2021-06-05 15:05:10,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:05:10,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:10,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:05:10,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:05:10,487 INFO L87 Difference]: Start difference. First operand 2648 states and 6597 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:10,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:10,985 INFO L93 Difference]: Finished difference Result 2814 states and 6984 transitions. [2021-06-05 15:05:10,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:05:10,985 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:05:10,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:10,988 INFO L225 Difference]: With dead ends: 2814 [2021-06-05 15:05:10,988 INFO L226 Difference]: Without dead ends: 2768 [2021-06-05 15:05:10,988 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 706.5ms TimeCoverageRelationStatistics Valid=309, Invalid=1413, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 15:05:10,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2768 states. [2021-06-05 15:05:11,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2768 to 2648. [2021-06-05 15:05:11,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2648 states, 2647 states have (on average 2.4922553834529655) internal successors, (6597), 2647 states have internal predecessors, (6597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:11,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2648 states to 2648 states and 6597 transitions. [2021-06-05 15:05:11,010 INFO L78 Accepts]: Start accepts. Automaton has 2648 states and 6597 transitions. Word has length 32 [2021-06-05 15:05:11,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:11,010 INFO L482 AbstractCegarLoop]: Abstraction has 2648 states and 6597 transitions. [2021-06-05 15:05:11,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:11,010 INFO L276 IsEmpty]: Start isEmpty. Operand 2648 states and 6597 transitions. [2021-06-05 15:05:11,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:05:11,011 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:11,012 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:11,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3848 [2021-06-05 15:05:11,212 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:11,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:11,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1915037294, now seen corresponding path program 242 times [2021-06-05 15:05:11,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:11,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786858583] [2021-06-05 15:05:11,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:11,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:11,621 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 12 [2021-06-05 15:05:11,846 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 10 [2021-06-05 15:05:12,105 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 10 [2021-06-05 15:05:12,183 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:12,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:12,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786858583] [2021-06-05 15:05:12,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786858583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:12,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943636443] [2021-06-05 15:05:12,184 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 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 15:05:12,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:05:12,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:12,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:05:12,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:12,519 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:12,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943636443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:12,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:12,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:05:12,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657282072] [2021-06-05 15:05:12,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:05:12,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:12,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:05:12,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:05:12,520 INFO L87 Difference]: Start difference. First operand 2648 states and 6597 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:13,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:13,022 INFO L93 Difference]: Finished difference Result 2806 states and 6972 transitions. [2021-06-05 15:05:13,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:05:13,023 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:05:13,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:13,025 INFO L225 Difference]: With dead ends: 2806 [2021-06-05 15:05:13,025 INFO L226 Difference]: Without dead ends: 2776 [2021-06-05 15:05:13,025 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 733.0ms TimeCoverageRelationStatistics Valid=232, Invalid=1328, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:05:13,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2776 states. [2021-06-05 15:05:13,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2776 to 2648. [2021-06-05 15:05:13,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2648 states, 2647 states have (on average 2.4922553834529655) internal successors, (6597), 2647 states have internal predecessors, (6597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:13,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2648 states to 2648 states and 6597 transitions. [2021-06-05 15:05:13,048 INFO L78 Accepts]: Start accepts. Automaton has 2648 states and 6597 transitions. Word has length 32 [2021-06-05 15:05:13,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:13,048 INFO L482 AbstractCegarLoop]: Abstraction has 2648 states and 6597 transitions. [2021-06-05 15:05:13,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:13,048 INFO L276 IsEmpty]: Start isEmpty. Operand 2648 states and 6597 transitions. [2021-06-05 15:05:13,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:05:13,050 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:13,050 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:13,250 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3863,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:13,251 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:13,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:13,251 INFO L82 PathProgramCache]: Analyzing trace with hash 1558451626, now seen corresponding path program 243 times [2021-06-05 15:05:13,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:13,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666297473] [2021-06-05 15:05:13,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:13,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:13,575 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:13,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:13,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666297473] [2021-06-05 15:05:13,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666297473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:13,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065418561] [2021-06-05 15:05:13,576 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 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 15:05:13,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 15:05:13,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:13,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:05:13,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:13,952 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:13,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065418561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:13,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:13,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:05:13,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443449570] [2021-06-05 15:05:13,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:05:13,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:13,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:05:13,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:05:13,953 INFO L87 Difference]: Start difference. First operand 2648 states and 6597 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:14,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:14,475 INFO L93 Difference]: Finished difference Result 2718 states and 6756 transitions. [2021-06-05 15:05:14,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:05:14,476 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:05:14,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:14,478 INFO L225 Difference]: With dead ends: 2718 [2021-06-05 15:05:14,478 INFO L226 Difference]: Without dead ends: 2696 [2021-06-05 15:05:14,478 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 867.5ms TimeCoverageRelationStatistics Valid=285, Invalid=1121, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:05:14,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2696 states. [2021-06-05 15:05:14,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2696 to 2656. [2021-06-05 15:05:14,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2656 states, 2655 states have (on average 2.4922787193973637) internal successors, (6617), 2655 states have internal predecessors, (6617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:14,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2656 states to 2656 states and 6617 transitions. [2021-06-05 15:05:14,498 INFO L78 Accepts]: Start accepts. Automaton has 2656 states and 6617 transitions. Word has length 32 [2021-06-05 15:05:14,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:14,498 INFO L482 AbstractCegarLoop]: Abstraction has 2656 states and 6617 transitions. [2021-06-05 15:05:14,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:14,498 INFO L276 IsEmpty]: Start isEmpty. Operand 2656 states and 6617 transitions. [2021-06-05 15:05:14,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 15:05:14,500 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:14,500 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:14,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3877 [2021-06-05 15:05:14,701 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:14,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:14,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1344530956, now seen corresponding path program 6 times [2021-06-05 15:05:14,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:14,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410186101] [2021-06-05 15:05:14,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:14,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:15,815 WARN L205 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 88 DAG size of output: 15 [2021-06-05 15:13:14,691 WARN L205 SmtUtils]: Spent 7.98 m on a formula simplification. DAG size of input: 115 DAG size of output: 13 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown